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* Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-16 04:48 Craig Ringer <[email protected]>
0 siblings, 1 reply; 48+ messages in thread
From: Craig Ringer @ 2016-11-16 04:48 UTC (permalink / raw)
To: pgsql-hackers; Peter Eisentraut <[email protected]>; Michael Paquier <[email protected]>
I found it a real pain to set up Perl 5.8.8 to re-check recent TAP
changes against it. It turns out there's a much easier way than
messing with VMs or manually doing a source install, so I documented
it to save others the future pain.
It'd be nice to commit this at least to 9.6 and v10. Trivial one-file
docs patch. There's no README to patch in 9.4 or 9.5.
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Attachments:
[text/x-patch] 0001-Document-that-perl-5.8.8-is-required.patch (1.1K, ../../CAMsr+YGGWK6dswsXZMoqFs7qy34iZeh7oniAz1m1QQvxXZYcAg@mail.gmail.com/2-0001-Document-that-perl-5.8.8-is-required.patch)
download | inline diff:
From 4ea6e7bff66ac2026bbca130bd036618b4012c35 Mon Sep 17 00:00:00 2001
From: Craig Ringer <[email protected]>
Date: Tue, 15 Nov 2016 15:45:41 +0800
Subject: [PATCH] Document that perl 5.8.8 is required
---
src/test/perl/README | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/src/test/perl/README b/src/test/perl/README
index cfb45a1..f15e4f0 100644
--- a/src/test/perl/README
+++ b/src/test/perl/README
@@ -64,3 +64,20 @@ For available PostgreSQL-specific test methods and some example tests read the
perldoc for the test modules, e.g.:
perldoc src/test/perl/PostgresNode.pm
+
+Required Perl
+-------------
+
+Tests must run on perl 5.8.8 and newer. perlbrew is a good way to obtain
+such a Perl; see https://metacpan.org/pod/distribution/App-perlbrew/bin/perlbrew .
+Just install and
+
+ perlbrew --force install 5.8.8
+ perlbrew use 5.8.8
+ perlbrew install-cpanm
+ cpanm install IPC::Run
+
+then re-run configure to ensure the correct Perl is used when running tests. To verify
+that the right Perl was found:
+
+ grep ^PERL= config.log
--
2.5.5
^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-16 07:32 Noah Misch <[email protected]>
parent: Craig Ringer <[email protected]>
0 siblings, 1 reply; 48+ messages in thread
From: Noah Misch @ 2016-11-16 07:32 UTC (permalink / raw)
To: Craig Ringer <[email protected]>; +Cc: pgsql-hackers; Peter Eisentraut <[email protected]>; Michael Paquier <[email protected]>
On Wed, Nov 16, 2016 at 12:48:03PM +0800, Craig Ringer wrote:
> --- a/src/test/perl/README
> +++ b/src/test/perl/README
> @@ -64,3 +64,20 @@ For available PostgreSQL-specific test methods and some example tests read the
> perldoc for the test modules, e.g.:
>
> perldoc src/test/perl/PostgresNode.pm
> +
> +Required Perl
> +-------------
> +
> +Tests must run on perl 5.8.8 and newer. perlbrew is a good way to obtain
Tests must run on Perl 5.8.0 and newer.
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^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-16 16:01 Michael Paquier <[email protected]>
parent: Noah Misch <[email protected]>
0 siblings, 1 reply; 48+ messages in thread
From: Michael Paquier @ 2016-11-16 16:01 UTC (permalink / raw)
To: Noah Misch <[email protected]>; +Cc: Craig Ringer <[email protected]>; pgsql-hackers; Peter Eisentraut <[email protected]>
On Tue, Nov 15, 2016 at 11:32 PM, Noah Misch <[email protected]> wrote:
> On Wed, Nov 16, 2016 at 12:48:03PM +0800, Craig Ringer wrote:
>> --- a/src/test/perl/README
>> +++ b/src/test/perl/README
>> @@ -64,3 +64,20 @@ For available PostgreSQL-specific test methods and some example tests read the
>> perldoc for the test modules, e.g.:
>>
>> perldoc src/test/perl/PostgresNode.pm
>> +
>> +Required Perl
>> +-------------
>> +
>> +Tests must run on perl 5.8.8 and newer. perlbrew is a good way to obtain
>
> Tests must run on Perl 5.8.0 and newer.
Hm? I thought that 5.8.8 was the minimum supported by recalling the
precious discussions. That's as well the oldest version of perldoc,
which is kind of useful. Anyway it would be nice to mention the
minimum requirements directly in src/test/perl/README?
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^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-17 02:00 Craig Ringer <[email protected]>
parent: Michael Paquier <[email protected]>
0 siblings, 1 reply; 48+ messages in thread
From: Craig Ringer @ 2016-11-17 02:00 UTC (permalink / raw)
To: Michael Paquier <[email protected]>; +Cc: Noah Misch <[email protected]>; pgsql-hackers; Peter Eisentraut <[email protected]>
On 17 November 2016 at 00:01, Michael Paquier <[email protected]> wrote:
> On Tue, Nov 15, 2016 at 11:32 PM, Noah Misch <[email protected]> wrote:
>> On Wed, Nov 16, 2016 at 12:48:03PM +0800, Craig Ringer wrote:
>>> --- a/src/test/perl/README
>>> +++ b/src/test/perl/README
>>> @@ -64,3 +64,20 @@ For available PostgreSQL-specific test methods and some example tests read the
>>> perldoc for the test modules, e.g.:
>>>
>>> perldoc src/test/perl/PostgresNode.pm
>>> +
>>> +Required Perl
>>> +-------------
>>> +
>>> +Tests must run on perl 5.8.8 and newer. perlbrew is a good way to obtain
>>
>> Tests must run on Perl 5.8.0 and newer.
Why? We've always discussed 5.8.8 before. That's already a full 10 years old.
5.8.0 is from *2002*. Are you running any 15-year-old systems you
can't update to a *patch release* of the same perl major?
gendef.pl says it needs 5.8.0 or newer with "use 5.8.0" but that's the
only relevant thing I can find, and it's not relevant to the TAP tests
anyway.
BTW, here's my older approach, with a dockerfile, before I became
aware of perlbrew:
https://www.postgresql.org/message-id/[email protected]...
5.8.8 is in CentOS 5.
Debian Lenny (6) has 5.14.2 Wheezy (5) has 5.10. Etch (4) has 5.8.8.
Etch came out in early 2007. Even Sarge had 5.8.4.
Ubuntu 10.04 Lucid (old-lts) had 5.10.1-8ubuntu2 .
So unless we care about Debian 3 Sarge or source builds done more than
10 years ago, 5.8.8 is more than good enough.
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^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-17 02:31 Kyotaro HORIGUCHI <[email protected]>
parent: Craig Ringer <[email protected]>
0 siblings, 1 reply; 48+ messages in thread
From: Kyotaro HORIGUCHI @ 2016-11-17 02:31 UTC (permalink / raw)
To: [email protected]; +Cc: [email protected]; [email protected]; pgsql-hackers; [email protected]
Hello,
At Thu, 17 Nov 2016 10:00:53 +0800, Craig Ringer <[email protected]> wrote in <CAMsr+YEmmS8XP8Oj6vu2J+TM3SP_AnjCL3k6TsOfk2FxaUXOkg@mail.gmail.com>
> On 17 November 2016 at 00:01, Michael Paquier <[email protected]> wrote:
> > On Tue, Nov 15, 2016 at 11:32 PM, Noah Misch <[email protected]> wrote:
> >> On Wed, Nov 16, 2016 at 12:48:03PM +0800, Craig Ringer wrote:
> >>> --- a/src/test/perl/README
> >>> +++ b/src/test/perl/README
> >>> @@ -64,3 +64,20 @@ For available PostgreSQL-specific test methods and some example tests read the
> >>> perldoc for the test modules, e.g.:
> >>>
> >>> perldoc src/test/perl/PostgresNode.pm
> >>> +
> >>> +Required Perl
> >>> +-------------
> >>> +
> >>> +Tests must run on perl 5.8.8 and newer. perlbrew is a good way to obtain
> >>
> >> Tests must run on Perl 5.8.0 and newer.
>
> Why? We've always discussed 5.8.8 before. That's already a full 10 years old.
>
> 5.8.0 is from *2002*. Are you running any 15-year-old systems you
> can't update to a *patch release* of the same perl major?
>
>
> gendef.pl says it needs 5.8.0 or newer with "use 5.8.0" but that's the
> only relevant thing I can find, and it's not relevant to the TAP tests
> anyway.
>
> BTW, here's my older approach, with a dockerfile, before I became
> aware of perlbrew:
>
> https://www.postgresql.org/message-id/[email protected]...
>
>
> 5.8.8 is in CentOS 5.
>
> Debian Lenny (6) has 5.14.2 Wheezy (5) has 5.10. Etch (4) has 5.8.8.
> Etch came out in early 2007. Even Sarge had 5.8.4.
>
> Ubuntu 10.04 Lucid (old-lts) had 5.10.1-8ubuntu2 .
>
> So unless we care about Debian 3 Sarge or source builds done more than
> 10 years ago, 5.8.8 is more than good enough.
I vote +1 to upgrading perl, but I'm not sure if all supporting
platforms other than linux support the version of perl.
Anyway ./configure is saying as the following.
| *** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
| *** Perl version 5.8 or later is required, but this is $pgac_perl_version." >&5
If TAP test requires 5.8.8, the whole build sequence should
follow that. Or at least ./configure --enable-tap-tests should
check that.
regards,
--
Kyotaro Horiguchi
NTT Open Source Software Center
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^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-17 02:42 Craig Ringer <[email protected]>
parent: Kyotaro HORIGUCHI <[email protected]>
0 siblings, 2 replies; 48+ messages in thread
From: Craig Ringer @ 2016-11-17 02:42 UTC (permalink / raw)
To: Kyotaro HORIGUCHI <[email protected]>; +Cc: Michael Paquier <[email protected]>; Noah Misch <[email protected]>; pgsql-hackers; Peter Eisentraut <[email protected]>
On 17 November 2016 at 10:31, Kyotaro HORIGUCHI
<[email protected]> wrote:
>
> I vote +1 to upgrading perl, but I'm not sure if all supporting
> platforms other than linux support the version of perl.
>
> Anyway ./configure is saying as the following.
>
> | *** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
> | *** Perl version 5.8 or later is required, but this is $pgac_perl_version." >&5
>
> If TAP test requires 5.8.8, the whole build sequence should
> follow that. Or at least ./configure --enable-tap-tests should
> check that.
I wrote 5.8.8 because that's what we've always discussed before and I
could honestly not imagine it mattering whether we require 10-year or
15-year old Perl. Especially for the TAP tests, which are new, and
optional.
I really don't think it matters if the TAP tests use a slightly newer
Perl. They're optional and not enabled by default. Can we just
document this please? I didn't think a four-line docs patch to an
optional, non-default, new test suite would require this kind of
discussion.
But sure, if it's easier, we can have 5.8.0 in the README. What's five
extra years matter anyway? Hey, while we're at it, lets change Pg to
build on Borland C and require K&R style!
--
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^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-17 02:54 Craig Ringer <[email protected]>
parent: Craig Ringer <[email protected]>
1 sibling, 2 replies; 48+ messages in thread
From: Craig Ringer @ 2016-11-17 02:54 UTC (permalink / raw)
To: Kyotaro HORIGUCHI <[email protected]>; +Cc: Michael Paquier <[email protected]>; Noah Misch <[email protected]>; pgsql-hackers; Peter Eisentraut <[email protected]>
On 17 November 2016 at 10:42, Craig Ringer <[email protected]> wrote:
> But sure, if it's easier, we can have 5.8.0 in the README. What's five
> extra years matter anyway? Hey, while we're at it, lets change Pg to
> build on Borland C and require K&R style!
Sorry. That was unnecessary. I should've had the sense to save that as
a draft and come back later.
In all seriousness, though, lets query the buildfarm database for Perl
versions. Let it answer.
--
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^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-17 02:59 Kyotaro HORIGUCHI <[email protected]>
parent: Craig Ringer <[email protected]>
1 sibling, 1 reply; 48+ messages in thread
From: Kyotaro HORIGUCHI @ 2016-11-17 02:59 UTC (permalink / raw)
To: [email protected]; +Cc: [email protected]; [email protected]; pgsql-hackers; [email protected]
At Thu, 17 Nov 2016 10:42:54 +0800, Craig Ringer <[email protected]> wrote in <CAMsr+YG_S+kAvcSoaOKfVeFgG2An_D+NSap7H3HCV+hTRduPWQ@mail.gmail.com>
> On 17 November 2016 at 10:31, Kyotaro HORIGUCHI
> <[email protected]> wrote:
>
> >
> > I vote +1 to upgrading perl, but I'm not sure if all supporting
> > platforms other than linux support the version of perl.
> >
> > Anyway ./configure is saying as the following.
> >
> > | *** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
> > | *** Perl version 5.8 or later is required, but this is $pgac_perl_version." >&5
> >
> > If TAP test requires 5.8.8, the whole build sequence should
> > follow that. Or at least ./configure --enable-tap-tests should
> > check that.
>
> I wrote 5.8.8 because that's what we've always discussed before and I
> could honestly not imagine it mattering whether we require 10-year or
> 15-year old Perl. Especially for the TAP tests, which are new, and
> optional.
>
> I really don't think it matters if the TAP tests use a slightly newer
> Perl. They're optional and not enabled by default. Can we just
If so, why explicitly require 5.8.8? I think it is because the
'slight' difference actually prevent the test from running.
> document this please? I didn't think a four-line docs patch to an
> optional, non-default, new test suite would require this kind of
> discussion.
My only concern is the fact that 'make check-world' runs the TAP
tests as a part if --enable-tap-tests (according to
release-9.4.sgml, but I haven't done by myself.). I completely
agree to you if it didn't run as a part of top-level 'make <some
kind of check>'.
> But sure, if it's easier, we can have 5.8.0 in the README. What's five
> extra years matter anyway? Hey, while we're at it, lets change Pg to
> build on Borland C and require K&R style!
It's seems an extreme story. And I *believe* anywhere written
that Pg requires some version of C standard.
regards,
--
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NTT Open Source Software Center
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^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-17 03:16 Kyotaro HORIGUCHI <[email protected]>
parent: Kyotaro HORIGUCHI <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Kyotaro HORIGUCHI @ 2016-11-17 03:16 UTC (permalink / raw)
To: [email protected]; +Cc: [email protected]; [email protected]; pgsql-hackers; [email protected]
Hello,
At Thu, 17 Nov 2016 11:59:02 +0900 (Tokyo Standard Time), Kyotaro HORIGUCHI <[email protected]> wrote in <[email protected]>
> My only concern is the fact that 'make check-world' runs the TAP
> tests as a part if --enable-tap-tests (according to
> release-9.4.sgml, but I haven't done by myself.). I completely
> agree to you if it didn't run as a part of top-level 'make <some
> kind of check>'.
Hmm. I notice that older perls may reject installation of TAP. If
that's true, no check needed but a description also might be
needed to --enable-tap-tests. Or, might not be needed since
anyway it fails for the older versions.
diff --git a/doc/src/sgml/installation.sgml b/doc/src/sgml/installation.sgml
index 296611d..58459e5 100644
--- a/doc/src/sgml/installation.sgml
+++ b/doc/src/sgml/installation.sgml
@@ -1285,9 +1285,11 @@ su - postgres
<term><option>--enable-tap-tests</option></term>
<listitem>
<para>
- Enable tests using the Perl TAP tools. This requires a Perl
- installation and the Perl module <literal>IPC::Run</literal>.
- <![%standalone-ignore;[See <xref linkend="regress-tap"> for more information.]]>
+ Enable tests using the Perl TAP tools. This requires a Perl (5.8.8
+ or later) installation and the Perl
+ module <literal>IPC::Run</literal>.
+ <![%standalone-ignore;[See <xref linkend="regress-tap"> for more
+ information.]]>
</para>
</listitem>
</varlistentry>
regards,
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^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-17 04:23 Michael Paquier <[email protected]>
parent: Craig Ringer <[email protected]>
1 sibling, 1 reply; 48+ messages in thread
From: Michael Paquier @ 2016-11-17 04:23 UTC (permalink / raw)
To: Craig Ringer <[email protected]>; +Cc: Kyotaro HORIGUCHI <[email protected]>; Noah Misch <[email protected]>; pgsql-hackers; Peter Eisentraut <[email protected]>
On Wed, Nov 16, 2016 at 6:54 PM, Craig Ringer <[email protected]> wrote:
> In all seriousness, though, lets query the buildfarm database for Perl
> versions. Let it answer.
castoroides, Solaris 10 and perl 5.8.4, no?
https://www.postgresql.org/message-id/[email protected]
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^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-17 06:47 Craig Ringer <[email protected]>
parent: Michael Paquier <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Craig Ringer @ 2016-11-17 06:47 UTC (permalink / raw)
To: Michael Paquier <[email protected]>; +Cc: Kyotaro HORIGUCHI <[email protected]>; Noah Misch <[email protected]>; pgsql-hackers; Peter Eisentraut <[email protected]>
On 17 November 2016 at 12:23, Michael Paquier <[email protected]> wrote:
> On Wed, Nov 16, 2016 at 6:54 PM, Craig Ringer <[email protected]> wrote:
>> In all seriousness, though, lets query the buildfarm database for Perl
>> versions. Let it answer.
>
> castoroides, Solaris 10 and perl 5.8.4, no?
> https://www.postgresql.org/message-id/[email protected]
Thanks for checking.
Can we just add the README text with Perl 5.8.4 then? Or 5.8.0 or
3.005 or whatever version is determined to be the oldest needed?
--
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^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-17 21:41 Robert Haas <[email protected]>
parent: Craig Ringer <[email protected]>
1 sibling, 1 reply; 48+ messages in thread
From: Robert Haas @ 2016-11-17 21:41 UTC (permalink / raw)
To: Craig Ringer <[email protected]>; +Cc: Kyotaro HORIGUCHI <[email protected]>; Michael Paquier <[email protected]>; Noah Misch <[email protected]>; pgsql-hackers; Peter Eisentraut <[email protected]>
On Wed, Nov 16, 2016 at 9:54 PM, Craig Ringer <[email protected]> wrote:
> On 17 November 2016 at 10:42, Craig Ringer <[email protected]> wrote:
>> But sure, if it's easier, we can have 5.8.0 in the README. What's five
>> extra years matter anyway? Hey, while we're at it, lets change Pg to
>> build on Borland C and require K&R style!
>
> Sorry. That was unnecessary. I should've had the sense to save that as
> a draft and come back later.
Well, *I* thought it was pretty funny...
I remember K&R style rather fondly. Of course it was inferior
technically, but if you could get things to compile that way you could
feel like a wizard for being able to make the old compiler work.
--
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* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-17 22:39 Craig Ringer <[email protected]>
parent: Robert Haas <[email protected]>
0 siblings, 1 reply; 48+ messages in thread
From: Craig Ringer @ 2016-11-17 22:39 UTC (permalink / raw)
To: Robert Haas <[email protected]>; +Cc: Kyotaro HORIGUCHI <[email protected]>; Michael Paquier <[email protected]>; Noah Misch <[email protected]>; pgsql-hackers; Peter Eisentraut <[email protected]>
On 18 November 2016 at 05:41, Robert Haas <[email protected]> wrote:
> On Wed, Nov 16, 2016 at 9:54 PM, Craig Ringer <[email protected]> wrote:
>> On 17 November 2016 at 10:42, Craig Ringer <[email protected]> wrote:
>>> But sure, if it's easier, we can have 5.8.0 in the README. What's five
>>> extra years matter anyway? Hey, while we're at it, lets change Pg to
>>> build on Borland C and require K&R style!
>>
>> Sorry. That was unnecessary. I should've had the sense to save that as
>> a draft and come back later.
>
> Well, *I* thought it was pretty funny...
>
> I remember K&R style rather fondly. Of course it was inferior
> technically, but if you could get things to compile that way you could
> feel like a wizard for being able to make the old compiler work.
Rather. I remember getting modern software to compile on SCO
OpenServer 5.0.5 that way. *Twich* *twitch*.
Anyway, here's an updated patch with version changed to 5.8.4 since
that's the newest we test on the buildfarm (and it's from 2004).
I wasted a bunch of time getting set up to test for such an ancient
Perl and would love to save the next person along the hassle by
documenting the easy way.
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Attachments:
[text/x-patch] 0001-Document-that-perl-5.8.4-is-required-for-TAP-tests.patch (1.4K, ../../CAMsr+YE6nEOh5BR2Mfbi9HQ4gszJERWOuaLAyz3bY10yex4yuQ@mail.gmail.com/2-0001-Document-that-perl-5.8.4-is-required-for-TAP-tests.patch)
download | inline diff:
From 2a911dda796e88c88703095ad2f34cb73ccf919b Mon Sep 17 00:00:00 2001
From: Craig Ringer <[email protected]>
Date: Tue, 15 Nov 2016 15:45:41 +0800
Subject: [PATCH] Document that perl 5.8.4 is required for TAP tests
We don't test with anything older than Perl 5.8.4 in the buildfarm
and it's from 2004, so document that the TAP tests are expected to
work with Perl 5.8.4 and explain how to get it easily.
This does not affect configure tests; we'll still compile against
an older Perl 5.8.x if there's one in the wild.
---
src/test/perl/README | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/src/test/perl/README b/src/test/perl/README
index cfb45a1..9c8bd05 100644
--- a/src/test/perl/README
+++ b/src/test/perl/README
@@ -64,3 +64,20 @@ For available PostgreSQL-specific test methods and some example tests read the
perldoc for the test modules, e.g.:
perldoc src/test/perl/PostgresNode.pm
+
+Required Perl
+-------------
+
+Tests must run on perl 5.8.4 and newer. perlbrew is a good way to obtain
+such a Perl; see https://metacpan.org/pod/distribution/App-perlbrew/bin/perlbrew .
+Just install and
+
+ perlbrew --force install 5.8.4
+ perlbrew use 5.8.4
+ perlbrew install-cpanm
+ cpanm install IPC::Run
+
+then re-run configure to ensure the correct Perl is used when running tests. To verify
+that the right Perl was found:
+
+ grep ^PERL= config.log
--
2.5.5
^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-17 23:10 Michael Paquier <[email protected]>
parent: Craig Ringer <[email protected]>
0 siblings, 1 reply; 48+ messages in thread
From: Michael Paquier @ 2016-11-17 23:10 UTC (permalink / raw)
To: Craig Ringer <[email protected]>; +Cc: Robert Haas <[email protected]>; Kyotaro HORIGUCHI <[email protected]>; Noah Misch <[email protected]>; pgsql-hackers; Peter Eisentraut <[email protected]>
On Thu, Nov 17, 2016 at 2:39 PM, Craig Ringer <[email protected]> wrote:
> I wasted a bunch of time getting set up to test for such an ancient
> Perl and would love to save the next person along the hassle by
> documenting the easy way.
It looks sensible to mention that in the README, so +1.
By the way, would it matter to mention ways to install perlbrew? For
example, I just bumped into http://install.perlbrew.pl by looking
around, though I don't doubt that most people would just use cpan with
"install App::perlbrew" for example. For OSX users with brew and
without macports that would matter.
--
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^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-18 00:15 Craig Ringer <[email protected]>
parent: Michael Paquier <[email protected]>
0 siblings, 1 reply; 48+ messages in thread
From: Craig Ringer @ 2016-11-18 00:15 UTC (permalink / raw)
To: Michael Paquier <[email protected]>; +Cc: Robert Haas <[email protected]>; Kyotaro HORIGUCHI <[email protected]>; Noah Misch <[email protected]>; pgsql-hackers; Peter Eisentraut <[email protected]>
On 18 November 2016 at 07:10, Michael Paquier <[email protected]> wrote:
> On Thu, Nov 17, 2016 at 2:39 PM, Craig Ringer <[email protected]> wrote:
>> I wasted a bunch of time getting set up to test for such an ancient
>> Perl and would love to save the next person along the hassle by
>> documenting the easy way.
>
> It looks sensible to mention that in the README, so +1.
>
> By the way, would it matter to mention ways to install perlbrew? For
> example, I just bumped into http://install.perlbrew.pl by looking
> around, though I don't doubt that most people would just use cpan with
> "install App::perlbrew" for example. For OSX users with brew and
> without macports that would matter.
The docs linked mention it, so I figured that'd probably do. Though I
notice it's only mentioned in the "configuration" section not under
"installation", so maybe it's worth adding yeah.
--
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^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-21 03:58 Craig Ringer <[email protected]>
parent: Craig Ringer <[email protected]>
0 siblings, 1 reply; 48+ messages in thread
From: Craig Ringer @ 2016-11-21 03:58 UTC (permalink / raw)
To: Michael Paquier <[email protected]>; +Cc: Robert Haas <[email protected]>; Kyotaro HORIGUCHI <[email protected]>; Noah Misch <[email protected]>; pgsql-hackers; Peter Eisentraut <[email protected]>
On 18 November 2016 at 08:15, Craig Ringer <[email protected]> wrote:
> On 18 November 2016 at 07:10, Michael Paquier <[email protected]> wrote:
>> On Thu, Nov 17, 2016 at 2:39 PM, Craig Ringer <[email protected]> wrote:
>>> I wasted a bunch of time getting set up to test for such an ancient
>>> Perl and would love to save the next person along the hassle by
>>> documenting the easy way.
>>
>> It looks sensible to mention that in the README, so +1.
>>
>> By the way, would it matter to mention ways to install perlbrew? For
>> example, I just bumped into http://install.perlbrew.pl by looking
>> around, though I don't doubt that most people would just use cpan with
>> "install App::perlbrew" for example. For OSX users with brew and
>> without macports that would matter.
>
> The docs linked mention it, so I figured that'd probably do. Though I
> notice it's only mentioned in the "configuration" section not under
> "installation", so maybe it's worth adding yeah.
Updated docs patch. Since configure checks for 5.8.0 that's what's
specified. Anyone who wants to argue about the actual version we
_should_ target can do so elsewhere, all I'm interested in is what we
_do_ officially target so I can document this.
--
Craig Ringer http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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Attachments:
[text/x-patch] 0001-Document-that-perl-5.8.0-is-required.patch (1.0K, ../../CAMsr+YHdiEMRB+2yBz=xaxBX5qTeB73nN1QS5dy4BUdT_W3csg@mail.gmail.com/2-0001-Document-that-perl-5.8.0-is-required.patch)
download | inline diff:
From e659e76ed2a1049ce5f7428fb6a8ef9deaef3ca6 Mon Sep 17 00:00:00 2001
From: Craig Ringer <[email protected]>
Date: Tue, 15 Nov 2016 15:45:41 +0800
Subject: [PATCH] Document that perl 5.8.0 is required
---
src/test/perl/README | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/src/test/perl/README b/src/test/perl/README
index cfb45a1..d2550a9 100644
--- a/src/test/perl/README
+++ b/src/test/perl/README
@@ -64,3 +64,21 @@ For available PostgreSQL-specific test methods and some example tests read the
perldoc for the test modules, e.g.:
perldoc src/test/perl/PostgresNode.pm
+
+Required Perl
+-------------
+
+Tests must run on perl 5.8.0 and newer. perlbrew is a good way to obtain
+such a Perl; see http://install.perlbrew.pl .
+
+Just install and
+
+ perlbrew --force install 5.8.0
+ perlbrew use 5.8.0
+ perlbrew install-cpanm
+ cpanm install IPC::Run
+
+then re-run configure to ensure the correct Perl is used when running tests. To verify
+that the right Perl was found:
+
+ grep ^PERL= config.log
--
2.5.5
^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-21 04:23 Kyotaro HORIGUCHI <[email protected]>
parent: Craig Ringer <[email protected]>
0 siblings, 1 reply; 48+ messages in thread
From: Kyotaro HORIGUCHI @ 2016-11-21 04:23 UTC (permalink / raw)
To: [email protected]; +Cc: [email protected]; [email protected]; [email protected]; pgsql-hackers; [email protected]
Hello,
At Mon, 21 Nov 2016 11:58:34 +0800, Craig Ringer <[email protected]> wrote in <CAMsr+YHdiEMRB+2yBz=xaxBX5qTeB73nN1QS5dy4BUdT_W3csg@mail.gmail.com>
> On 18 November 2016 at 08:15, Craig Ringer <[email protected]> wrote:
> > On 18 November 2016 at 07:10, Michael Paquier <[email protected]> wrote:
> >> On Thu, Nov 17, 2016 at 2:39 PM, Craig Ringer <[email protected]> wrote:
> >>> I wasted a bunch of time getting set up to test for such an ancient
> >>> Perl and would love to save the next person along the hassle by
> >>> documenting the easy way.
> >>
> >> It looks sensible to mention that in the README, so +1.
I appreciate the labor. Anyway I don't object for adding that to
the README. +1.
> >> By the way, would it matter to mention ways to install perlbrew? For
> >> example, I just bumped into http://install.perlbrew.pl by looking
> >> around, though I don't doubt that most people would just use cpan with
> >> "install App::perlbrew" for example. For OSX users with brew and
> >> without macports that would matter.
> >
> > The docs linked mention it, so I figured that'd probably do. Though I
> > notice it's only mentioned in the "configuration" section not under
> > "installation", so maybe it's worth adding yeah.
>
> Updated docs patch. Since configure checks for 5.8.0 that's what's
> specified. Anyone who wants to argue about the actual version we
> _should_ target can do so elsewhere, all I'm interested in is what we
> _do_ officially target so I can document this.
I understand you :p By the way, the new doc points to
http://install.perlbrew.pl and it just shows the install
script. It seems more puzzling..
I suppose https://perlbrew.pl/ seems to me the primary site for
perbrew.
| Perlbrew
|
| perlbrew is an admin-free perl installation management tool. The latest version is 0.78, read the release note: Release 0.78.
|
| Install, quickly
|
| Copy & Paste this line into your terminal:
|
| \curl -L https://install.perlbrew.pl | bash
regards,
--
Kyotaro Horiguchi
NTT Open Source Software Center
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^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-21 06:38 Craig Ringer <[email protected]>
parent: Kyotaro HORIGUCHI <[email protected]>
0 siblings, 1 reply; 48+ messages in thread
From: Craig Ringer @ 2016-11-21 06:38 UTC (permalink / raw)
To: Kyotaro HORIGUCHI <[email protected]>; +Cc: Michael Paquier <[email protected]>; Robert Haas <[email protected]>; Noah Misch <[email protected]>; pgsql-hackers; Peter Eisentraut <[email protected]>
On 21 November 2016 at 12:23, Kyotaro HORIGUCHI
<[email protected]> wrote:
> Hello,
>
> At Mon, 21 Nov 2016 11:58:34 +0800, Craig Ringer <[email protected]> wrote in <CAMsr+YHdiEMRB+2yBz=xaxBX5qTeB73nN1QS5dy4BUdT_W3csg@mail.gmail.com>
>> On 18 November 2016 at 08:15, Craig Ringer <[email protected]> wrote:
>> > On 18 November 2016 at 07:10, Michael Paquier <[email protected]> wrote:
>> >> On Thu, Nov 17, 2016 at 2:39 PM, Craig Ringer <[email protected]> wrote:
>> >>> I wasted a bunch of time getting set up to test for such an ancient
>> >>> Perl and would love to save the next person along the hassle by
>> >>> documenting the easy way.
>> >>
>> >> It looks sensible to mention that in the README, so +1.
>
> I appreciate the labor. Anyway I don't object for adding that to
> the README. +1.
Thanks.
> I understand you :p By the way, the new doc points to
> http://install.perlbrew.pl and it just shows the install
> script. It seems more puzzling..
>
> I suppose https://perlbrew.pl/ seems to me the primary site for
> perbrew.
Oops!
Fixed in attached.
--
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[text/x-patch] 0001-Document-that-perl-5.8.0-is-required.patch (1.0K, ../../CAMsr+YFDK5OL7kq+-6nZf14VRT4s-TZptAggocDa8N+esym5RQ@mail.gmail.com/2-0001-Document-that-perl-5.8.0-is-required.patch)
download | inline diff:
From e9a654aebd76abeadd5bc592191f8b01bce3716e Mon Sep 17 00:00:00 2001
From: Craig Ringer <[email protected]>
Date: Tue, 15 Nov 2016 15:45:41 +0800
Subject: [PATCH] Document that perl 5.8.0 is required
---
src/test/perl/README | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/src/test/perl/README b/src/test/perl/README
index cfb45a1..0732cac 100644
--- a/src/test/perl/README
+++ b/src/test/perl/README
@@ -64,3 +64,21 @@ For available PostgreSQL-specific test methods and some example tests read the
perldoc for the test modules, e.g.:
perldoc src/test/perl/PostgresNode.pm
+
+Required Perl
+-------------
+
+Tests must run on perl 5.8.0 and newer. perlbrew is a good way to obtain
+such a Perl; see http://perlbrew.pl .
+
+Just install and
+
+ perlbrew --force install 5.8.0
+ perlbrew use 5.8.0
+ perlbrew install-cpanm
+ cpanm install IPC::Run
+
+then re-run configure to ensure the correct Perl is used when running tests. To verify
+that the right Perl was found:
+
+ grep ^PERL= config.log
--
2.5.5
^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-21 07:45 Michael Paquier <[email protected]>
parent: Craig Ringer <[email protected]>
0 siblings, 1 reply; 48+ messages in thread
From: Michael Paquier @ 2016-11-21 07:45 UTC (permalink / raw)
To: Craig Ringer <[email protected]>; +Cc: Kyotaro HORIGUCHI <[email protected]>; Robert Haas <[email protected]>; Noah Misch <[email protected]>; pgsql-hackers; Peter Eisentraut <[email protected]>
On Mon, Nov 21, 2016 at 3:38 PM, Craig Ringer <[email protected]> wrote:
> On 21 November 2016 at 12:23, Kyotaro HORIGUCHI
> <[email protected]> wrote:
>> I understand you :p By the way, the new doc points to
>> http://install.perlbrew.pl and it just shows the install
>> script. It seems more puzzling..
>>
>> I suppose https://perlbrew.pl/ seems to me the primary site for
>> perbrew.
>
> Oops!
>
> Fixed in attached.
No objections to this version. It's a good idea to document that.
--
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^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-11-21 08:37 Kyotaro HORIGUCHI <[email protected]>
parent: Michael Paquier <[email protected]>
0 siblings, 1 reply; 48+ messages in thread
From: Kyotaro HORIGUCHI @ 2016-11-21 08:37 UTC (permalink / raw)
To: [email protected]; +Cc: [email protected]; [email protected]; [email protected]; pgsql-hackers; [email protected]
At Mon, 21 Nov 2016 16:45:10 +0900, Michael Paquier <[email protected]> wrote in <CAB7nPqTuNtqkxPvk38ZP6HKRX6XdL62SPPfRas5P-S-d_Kt2iA@mail.gmail.com>
> > Fixed in attached.
>
> No objections to this version. It's a good idea to document that.
+1
regards,
--
Kyotaro Horiguchi
NTT Open Source Software Center
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* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-12-04 05:28 Noah Misch <[email protected]>
parent: Kyotaro HORIGUCHI <[email protected]>
0 siblings, 2 replies; 48+ messages in thread
From: Noah Misch @ 2016-12-04 05:28 UTC (permalink / raw)
To: Kyotaro HORIGUCHI <[email protected]>; +Cc: [email protected]; [email protected]; [email protected]; pgsql-hackers; [email protected]
On Mon, Nov 21, 2016 at 11:58:34AM +0800, Craig Ringer wrote:
> Updated docs patch. Since configure checks for 5.8.0 that's what's
> specified. Anyone who wants to argue about the actual version we
> _should_ target can do so elsewhere, all I'm interested in is what we
> _do_ officially target so I can document this.
That's a proper separation of efforts; thanks.
On Mon, Nov 21, 2016 at 05:37:50PM +0900, Kyotaro HORIGUCHI wrote:
> At Mon, 21 Nov 2016 16:45:10 +0900, Michael Paquier <[email protected]> wrote in <CAB7nPqTuNtqkxPvk38ZP6HKRX6XdL62SPPfRas5P-S-d_Kt2iA@mail.gmail.com>
> > No objections to this version. It's a good idea to document that.
>
> +1
Committed after re-filling paragraphs.
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* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-12-05 05:19 Michael Paquier <[email protected]>
parent: Noah Misch <[email protected]>
1 sibling, 0 replies; 48+ messages in thread
From: Michael Paquier @ 2016-12-05 05:19 UTC (permalink / raw)
To: Noah Misch <[email protected]>; +Cc: Kyotaro HORIGUCHI <[email protected]>; [email protected]; Robert Haas <[email protected]>; pgsql-hackers; [email protected]
On Sun, Dec 4, 2016 at 2:28 PM, Noah Misch <[email protected]> wrote:
> Committed after re-filling paragraphs.
Thanks, I have updated the CF entry as well.
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* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-12-05 11:17 Dagfinn Ilmari Mannsåker <[email protected]>
parent: Noah Misch <[email protected]>
1 sibling, 1 reply; 48+ messages in thread
From: Dagfinn Ilmari Mannsåker @ 2016-12-05 11:17 UTC (permalink / raw)
To: Noah Misch <[email protected]>; +Cc: Kyotaro HORIGUCHI <[email protected]>; [email protected]; [email protected]; [email protected]; pgsql-hackers; [email protected]
Noah Misch <[email protected]> writes:
> On Mon, Nov 21, 2016 at 05:37:50PM +0900, Kyotaro HORIGUCHI wrote:
>> At Mon, 21 Nov 2016 16:45:10 +0900, Michael Paquier <[email protected]> wrote in <CAB7nPqTuNtqkxPvk38ZP6HKRX6XdL62SPPfRas5P-S-d_Kt2iA@mail.gmail.com>
>> > No objections to this version. It's a good idea to document that.
>>
>> +1
>
> Committed after re-filling paragraphs.
I just noticed this bit in the committed patch:
+ cpanm install IPC::Run
This is not the correct invocation of cpanm: it just takes a list of
module names. This will pull in the 'install' module, which is
harmless, but unnecessary: https://metacpan.org/pod/install.
--
"I use RMS as a guide in the same way that a boat captain would use
a lighthouse. It's good to know where it is, but you generally
don't want to find yourself in the same spot." - Tollef Fog Heen
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* Re: Document how to set up TAP tests for Perl 5.8.8
@ 2016-12-05 13:15 Craig Ringer <[email protected]>
parent: Dagfinn Ilmari Mannsåker <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Craig Ringer @ 2016-12-05 13:15 UTC (permalink / raw)
To: Dagfinn Ilmari Mannsåker <[email protected]>; +Cc: Noah Misch <[email protected]>; Kyotaro HORIGUCHI <[email protected]>; Michael Paquier <[email protected]>; Robert Haas <[email protected]>; pgsql-hackers; Peter Eisentraut <[email protected]>
On 5 December 2016 at 19:17, Dagfinn Ilmari Mannsåker <[email protected]> wrote:
> This is not the correct invocation of cpanm: it just takes a list of
> module names. This will pull in the 'install' module, which is
> harmless, but unnecessary: https://metacpan.org/pod/install.
Ha. Good catch. Since, as you noted, it's harmless I didn't realise
it'd happened.
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* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
--------------FA974B75A0C3E9CA18CE7207
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
--------------FA974B75A0C3E9CA18CE7207
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
--------------FA974B75A0C3E9CA18CE7207
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
--------------FA974B75A0C3E9CA18CE7207
Content-Type: application/x-shellscript;
name="brin.sh"
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
filename="brin.sh"
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
--------------FA974B75A0C3E9CA18CE7207
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
--------------FA974B75A0C3E9CA18CE7207
Content-Type: application/x-shellscript;
name="brin.sh"
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
filename="brin.sh"
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
--------------FA974B75A0C3E9CA18CE7207
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
--------------FA974B75A0C3E9CA18CE7207
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
--------------FA974B75A0C3E9CA18CE7207
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* [PATCH 8/8] batch build
@ 2021-01-22 00:11 Tomas Vondra <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Tomas Vondra @ 2021-01-22 00:11 UTC (permalink / raw)
---
src/backend/access/brin/brin_minmax_multi.c | 204 ++++++++++++++++++--
src/backend/access/brin/brin_tuple.c | 1 +
src/include/access/brin_tuple.h | 2 +-
3 files changed, 186 insertions(+), 21 deletions(-)
diff --git a/src/backend/access/brin/brin_minmax_multi.c b/src/backend/access/brin/brin_minmax_multi.c
index 094ecd2be9..72cca6f26b 100644
--- a/src/backend/access/brin/brin_minmax_multi.c
+++ b/src/backend/access/brin/brin_minmax_multi.c
@@ -57,6 +57,7 @@
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
+#include "access/hash.h" /* XXX strange that it fails because of BRIN_AM_OID without this */
#include "access/reloptions.h"
#include "access/stratnum.h"
#include "access/htup_details.h"
@@ -150,12 +151,23 @@ typedef struct MinMaxOptions
typedef struct Ranges
{
Oid typid;
+ Oid colloid;
+ AttrNumber attno;
/* (2*nranges + nvalues) <= maxvalues */
int nranges; /* number of ranges in the array (stored) */
int nvalues; /* number of values in the data array (all) */
int maxvalues; /* maximum number of values (reloption) */
+ /*
+ * Batch mode means we're simply appending values into new range,
+ * without any expensive steps (sorting, deduplication, ...). The
+ * buffer is sized to be much larger, but we keep the actual target
+ * size so that when serializing values we can do the right thing.
+ */
+ bool batch_mode;
+ int target_maxvalues;
+
/* values stored for this range - either raw values, or ranges */
Datum values[FLEXIBLE_ARRAY_MEMBER];
} Ranges;
@@ -375,6 +387,7 @@ range_deserialize(SerializedRanges *serialized)
range->nvalues = serialized->nvalues;
range->maxvalues = serialized->maxvalues;
range->typid = serialized->typid;
+ range->batch_mode = false;
typbyval = get_typbyval(serialized->typid);
typlen = get_typlen(serialized->typid);
@@ -844,11 +857,14 @@ fill_combine_ranges(CombineRange *cranges, int ncranges, Ranges *ranges)
/*
* Sort combine ranges using qsort (with BTLessStrategyNumber function).
*/
-static void
+static int
sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
- CombineRange *cranges, int ncranges)
+ CombineRange *cranges, int ncranges,
+ bool deduplicate)
{
- compare_context cxt;
+ int n;
+ int i;
+ compare_context cxt;
/* sort the values */
cxt.colloid = colloid;
@@ -856,6 +872,24 @@ sort_combine_ranges(FmgrInfo *cmp, Oid colloid,
qsort_arg(cranges, ncranges, sizeof(CombineRange),
compare_combine_ranges, (void *) &cxt);
+
+ if (!deduplicate)
+ return ncranges;
+
+ /* optionally deduplicate the ranges */
+ n = 1;
+ for (i = 1; i < ncranges; i++)
+ {
+ if (compare_combine_ranges(&cranges[i-1], &cranges[i], (void *) &cxt))
+ {
+ if (i != n)
+ memcpy(&cranges[n], &cranges[i], sizeof(CombineRange));
+
+ n++;
+ }
+ }
+
+ return n;
}
/*
@@ -1026,26 +1060,40 @@ build_distances(FmgrInfo *distanceFn, Oid colloid,
*/
static CombineRange *
build_combine_ranges(FmgrInfo *cmp, Oid colloid, Ranges *ranges,
- Datum newvalue, int *nranges)
+ bool addvalue, Datum newvalue, int *nranges,
+ bool deduplicate)
{
int ncranges;
CombineRange *cranges;
/* now do the actual merge sort */
- ncranges = ranges->nranges + ranges->nvalues + 1;
+ ncranges = ranges->nranges + ranges->nvalues;
+
+ /* should we add an extra value? */
+ if (addvalue)
+ ncranges += 1;
+
cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
- *nranges = ncranges;
/* put the new value at the beginning */
- cranges[0].minval = newvalue;
- cranges[0].maxval = newvalue;
- cranges[0].collapsed = true;
+ if (addvalue)
+ {
+ cranges[0].minval = newvalue;
+ cranges[0].maxval = newvalue;
+ cranges[0].collapsed = true;
- /* then the regular and collapsed ranges */
- fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ /* then the regular and collapsed ranges */
+ fill_combine_ranges(&cranges[1], ncranges-1, ranges);
+ }
+ else
+ fill_combine_ranges(cranges, ncranges, ranges);
/* and sort the ranges */
- sort_combine_ranges(cmp, colloid, cranges, ncranges);
+ ncranges = sort_combine_ranges(cmp, colloid, cranges, ncranges,
+ deduplicate);
+
+ /* remember how many cranges we built */
+ *nranges = ncranges;
return cranges;
}
@@ -1074,6 +1122,7 @@ count_values(CombineRange *cranges, int ncranges)
}
#endif
+
/*
* reduce_combine_ranges
* reduce the ranges until the number of values is low enough
@@ -1250,6 +1299,25 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
Assert(2*ranges->nranges + ranges->nvalues <= ranges->maxvalues);
+ Assert((ranges->nranges >= 0) && (ranges->nvalues >= 0) && (ranges->maxvalues >= 0));
+
+ /*
+ * When batch-building, there should be no ranges. So either the
+ * number of ranges is 0 or we're not in batching mode.
+ */
+ Assert(!ranges->batch_mode || (ranges->nranges == 0));
+
+ /* When batch-building, just add it and we're done. */
+ if (ranges->batch_mode)
+ {
+ /* there has to be free space, if we've sized the struct */
+ Assert(ranges->nvalues < ranges->maxvalues);
+
+ ranges->values[ranges->nvalues++] = newval;
+
+ return true;
+ }
+
/*
* Bail out if the value already is covered by the range.
*
@@ -1322,7 +1390,9 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
ranges->nvalues);
/* OK build the combine ranges */
- cranges = build_combine_ranges(cmpFn, colloid, ranges, newval, &ncranges);
+ cranges = build_combine_ranges(cmpFn, colloid, ranges,
+ true, newval, &ncranges,
+ false);
/* Reduce the ranges if needed */
if (ncranges > ranges->maxvalues)
@@ -1382,6 +1452,81 @@ range_add_value(BrinDesc *bdesc, Oid colloid,
return true;
}
+/*
+ * Generate range representation of data collected during "batch mode".
+ * This is similar to reduce_combine_ranges, except that we can't assume
+ * the values are sorted and there may be duplicate values.
+ */
+static void
+compactify_ranges(BrinDesc *bdesc, Ranges *ranges, int max_values)
+{
+ FmgrInfo *cmpFn,
+ *distanceFn;
+
+ /* combine ranges */
+ CombineRange *cranges;
+ int ncranges;
+ DistanceValue *distances;
+
+ MemoryContext ctx;
+ MemoryContext oldctx;
+
+ /*
+ * This should only be used in batch mode, and there should be no
+ * ranges, just individual values.
+ */
+ Assert((ranges->batch_mode) && (ranges->nranges == 0));
+
+ /* we'll certainly need the comparator, so just look it up now */
+ cmpFn = minmax_multi_get_strategy_procinfo(bdesc, ranges->attno, ranges->typid,
+ BTLessStrategyNumber);
+
+ /* and we'll also need the 'distance' procedure */
+ distanceFn = minmax_multi_get_procinfo(bdesc, ranges->attno, PROCNUM_DISTANCE);
+
+ /*
+ * The distanceFn calls (which may internally call e.g. numeric_le) may
+ * allocate quite a bit of memory, and we must not leak it. Otherwise
+ * we'd have problems e.g. when building indexes. So we create a local
+ * memory context and make sure we free the memory before leaving this
+ * function (not after every call).
+ */
+ ctx = AllocSetContextCreate(CurrentMemoryContext,
+ "minmax-multi context",
+ ALLOCSET_DEFAULT_SIZES);
+
+ oldctx = MemoryContextSwitchTo(ctx);
+
+ /* OK build the combine ranges */
+ cranges = build_combine_ranges(cmpFn, ranges->colloid, ranges,
+ false, (Datum) 0, &ncranges,
+ true); /* deduplicate */
+
+ /* build array of gap distances and sort them in ascending order */
+ distances = build_distances(distanceFn, ranges->colloid, cranges, ncranges);
+
+ /*
+ * Combine ranges until we get below max_values. We don't use any scale
+ * factor, because this is used at the very end of "batch mode" and we
+ * don't expect more tuples to be inserted soon.
+ */
+ ncranges = reduce_combine_ranges(cranges, ncranges, distances,
+ max_values, cmpFn, ranges->colloid);
+
+ Assert(count_values(cranges, ncranges) <= max_values);
+
+ /* decompose the combine ranges into regular ranges and single values */
+ store_combine_ranges(ranges, cranges, ncranges);
+
+ MemoryContextSwitchTo(oldctx);
+ MemoryContextDelete(ctx);
+
+ /* Check the ordering invariants are not violated (for both parts). */
+ AssertArrayOrder(cmpFn, ranges->colloid, ranges->values, ranges->nranges*2);
+ AssertArrayOrder(cmpFn, ranges->colloid, &ranges->values[ranges->nranges*2],
+ ranges->nvalues);
+}
+
Datum
brin_minmax_multi_opcinfo(PG_FUNCTION_ARGS)
{
@@ -1799,10 +1944,16 @@ brin_minmax_multi_distance_inet(PG_FUNCTION_ARGS)
}
static void
-brin_minmax_multi_serialize(Datum src, Datum *dst)
+brin_minmax_multi_serialize(BrinDesc *bdesc, Datum src, Datum *dst)
{
Ranges *ranges = (Ranges *) DatumGetPointer(src);
- SerializedRanges *s = range_serialize(ranges);
+ SerializedRanges *s;
+
+ /* In batch mode, we need to compress the accumulated values. */
+ if (ranges->batch_mode)
+ compactify_ranges(bdesc, ranges, ranges->target_maxvalues);
+
+ s = range_serialize(ranges);
dst[0] = PointerGetDatum(s);
}
@@ -1845,15 +1996,28 @@ brin_minmax_multi_add_value(PG_FUNCTION_ARGS)
/*
* If this is the first non-null value, we need to initialize the range
* list. Otherwise just extract the existing range list from BrinValues.
+ *
+ * When starting with an empty range, we assume this is a batch mode,
+ * i.e. we size the buffer for the maximum possible number of items in
+ * the range (based on range size and max number of items on a page).
+ *
+ * XXX This may require quite a bit of memory, so maybe we should use
+ * some value in between. OTOH most tables will have much wider rows,
+ * so the number of rows per page is much lower.
*/
if (column->bv_allnulls)
{
MemoryContext oldctx;
- oldctx = MemoryContextSwitchTo(column->bv_context);
+ BlockNumber pagesPerRange = BrinGetPagesPerRange(bdesc->bd_index);
- ranges = minmax_multi_init(brin_minmax_multi_get_values(bdesc, opts));
+ oldctx = MemoryContextSwitchTo(column->bv_context);
+ ranges = minmax_multi_init(MaxHeapTuplesPerPage * pagesPerRange);
+ ranges->attno = attno;
+ ranges->colloid = colloid;
ranges->typid = attr->atttypid;
+ ranges->batch_mode = true;
+ ranges->target_maxvalues = brin_minmax_multi_get_values(bdesc, opts);
MemoryContextSwitchTo(oldctx);
@@ -2125,7 +2289,7 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
oldctx = MemoryContextSwitchTo(ctx);
/* allocate and fill */
- cranges = (CombineRange *)palloc0(ncranges * sizeof(CombineRange));
+ cranges = (CombineRange *) palloc0(ncranges * sizeof(CombineRange));
/* fill the combine ranges with entries for the first range */
fill_combine_ranges(cranges, ranges_a->nranges + ranges_a->nvalues,
@@ -2139,8 +2303,8 @@ brin_minmax_multi_union(PG_FUNCTION_ARGS)
cmpFn = minmax_multi_get_strategy_procinfo(bdesc, attno, attr->atttypid,
BTLessStrategyNumber);
- /* sort the combine ranges */
- sort_combine_ranges(cmpFn, colloid, cranges, ncranges);
+ /* sort the combine ranges (don't deduplicate) */
+ sort_combine_ranges(cmpFn, colloid, cranges, ncranges, false);
/*
* We've merged two different lists of ranges, so some of them may be
diff --git a/src/backend/access/brin/brin_tuple.c b/src/backend/access/brin/brin_tuple.c
index df820db029..bf8635d788 100644
--- a/src/backend/access/brin/brin_tuple.c
+++ b/src/backend/access/brin/brin_tuple.c
@@ -163,6 +163,7 @@ brin_form_tuple(BrinDesc *brdesc, BlockNumber blkno, BrinMemTuple *tuple,
if (tuple->bt_columns[keyno].bv_serialize)
{
tuple->bt_columns[keyno].bv_serialize(
+ brdesc,
tuple->bt_columns[keyno].bv_mem_value,
tuple->bt_columns[keyno].bv_values);
}
diff --git a/src/include/access/brin_tuple.h b/src/include/access/brin_tuple.h
index 66a6c3c792..e08998b71a 100644
--- a/src/include/access/brin_tuple.h
+++ b/src/include/access/brin_tuple.h
@@ -14,7 +14,7 @@
#include "access/brin_internal.h"
#include "access/tupdesc.h"
-typedef void (*brin_serialize_callback_type) (Datum src, Datum * dst);
+typedef void (*brin_serialize_callback_type) (BrinDesc *bdesc, Datum src, Datum * dst);
/*
* A BRIN index stores one index tuple per page range. Each index tuple
--
2.26.2
--------------FA974B75A0C3E9CA18CE7207
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name="brin.sh"
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
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--------------FA974B75A0C3E9CA18CE7207--
^ permalink raw reply [nested|flat] 48+ messages in thread
* Fix grammar oddities in comments
@ 2024-06-01 22:08 James Coleman <[email protected]>
0 siblings, 1 reply; 48+ messages in thread
From: James Coleman @ 2024-06-01 22:08 UTC (permalink / raw)
To: pgsql-hackers
Hi,
See attached for a small patch fixing some typos and grammatical
errors in a couple of comments.
Side note: It's not clear to me what "Vars of higher levels don't
matter here" means in this context (or how that claim is justified),
but I haven't changed that part of the comment opting to simply
resolve the clear mistakes in the wording here.
Regards,
James Coleman
Attachments:
[application/octet-stream] v1-0001-Fix-comment-grammar-oddities.patch (1.4K, ../../CAAaqYe9ZQ_1+QiF_Nv7b37opicBu+35ZQK1CetQ54r5UdrF1eg@mail.gmail.com/2-v1-0001-Fix-comment-grammar-oddities.patch)
download | inline diff:
From f4b53414b9ff3ba854c06a5813bb38a10e4f2f26 Mon Sep 17 00:00:00 2001
From: jcoleman <[email protected]>
Date: Sat, 1 Jun 2024 11:22:27 -0700
Subject: [PATCH v1] Fix comment grammar oddities
---
src/backend/optimizer/plan/subselect.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/src/backend/optimizer/plan/subselect.c b/src/backend/optimizer/plan/subselect.c
index e35ebea8b4..846081dc73 100644
--- a/src/backend/optimizer/plan/subselect.c
+++ b/src/backend/optimizer/plan/subselect.c
@@ -1271,15 +1271,15 @@ convert_ANY_sublink_to_join(PlannerInfo *root, SubLink *sublink,
Assert(sublink->subLinkType == ANY_SUBLINK);
/*
- * If the sub-select refers to any Vars of the parent query, we so let's
- * considering it as LATERAL. (Vars of higher levels don't matter here.)
+ * If the sub-select refers to any Vars of the parent query, we treat it
+ * as LATERAL. (Vars of higher levels don't matter here.)
*/
sub_ref_outer_relids = pull_varnos_of_level(NULL, (Node *) subselect, 1);
use_lateral = !bms_is_empty(sub_ref_outer_relids);
/*
- * Check that sub-select refers nothing outside of available_rels of the
- * parent query.
+ * The sub-select can't refer to any rels beyond what the parent query
+ * makes available.
*/
if (!bms_is_subset(sub_ref_outer_relids, available_rels))
return NULL;
--
2.39.3 (Apple Git-146)
^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Fix grammar oddities in comments
@ 2024-06-05 09:34 David Rowley <[email protected]>
parent: James Coleman <[email protected]>
0 siblings, 1 reply; 48+ messages in thread
From: David Rowley @ 2024-06-05 09:34 UTC (permalink / raw)
To: James Coleman <[email protected]>; +Cc: pgsql-hackers
On Sun, 2 Jun 2024 at 10:08, James Coleman <[email protected]> wrote:
> See attached for a small patch fixing some typos and grammatical
> errors in a couple of comments.
Thanks. I pushed this after messing with the comments a bit more.
> Side note: It's not clear to me what "Vars of higher levels don't
> matter here" means in this context (or how that claim is justified),
> but I haven't changed that part of the comment opting to simply
> resolve the clear mistakes in the wording here.
It just means Vars with varlevelsup >= 2 don't matter. It only cares
about Vars with varlevelsup==1, i.e. Vars of the sub-query's direct
parent.
David
^ permalink raw reply [nested|flat] 48+ messages in thread
* Re: Fix grammar oddities in comments
@ 2024-06-08 22:04 Aaron Altman <[email protected]>
parent: David Rowley <[email protected]>
0 siblings, 0 replies; 48+ messages in thread
From: Aaron Altman @ 2024-06-08 22:04 UTC (permalink / raw)
To: [email protected]; +Cc: James Coleman <[email protected]>
The following review has been posted through the commitfest application:
make installcheck-world: not tested
Implements feature: not tested
Spec compliant: not tested
Documentation: not tested
Confirming linguistic correctness of changes, and lack of anything changed outside of comments that would otherwise affect readiness to commit.
The new status of this patch is: Ready for Committer
^ permalink raw reply [nested|flat] 48+ messages in thread
end of thread, other threads:[~2024-06-08 22:04 UTC | newest]
Thread overview: 48+ messages (download: mbox mbox.gz follow: Atom feed)
-- links below jump to the message on this page --
2016-11-16 04:48 Document how to set up TAP tests for Perl 5.8.8 Craig Ringer <[email protected]>
2016-11-16 07:32 ` Noah Misch <[email protected]>
2016-11-16 16:01 ` Michael Paquier <[email protected]>
2016-11-17 02:00 ` Craig Ringer <[email protected]>
2016-11-17 02:31 ` Kyotaro HORIGUCHI <[email protected]>
2016-11-17 02:42 ` Craig Ringer <[email protected]>
2016-11-17 02:54 ` Craig Ringer <[email protected]>
2016-11-17 04:23 ` Michael Paquier <[email protected]>
2016-11-17 06:47 ` Craig Ringer <[email protected]>
2016-11-17 21:41 ` Robert Haas <[email protected]>
2016-11-17 22:39 ` Craig Ringer <[email protected]>
2016-11-17 23:10 ` Michael Paquier <[email protected]>
2016-11-18 00:15 ` Craig Ringer <[email protected]>
2016-11-21 03:58 ` Craig Ringer <[email protected]>
2016-11-21 04:23 ` Kyotaro HORIGUCHI <[email protected]>
2016-11-21 06:38 ` Craig Ringer <[email protected]>
2016-11-21 07:45 ` Michael Paquier <[email protected]>
2016-11-21 08:37 ` Kyotaro HORIGUCHI <[email protected]>
2016-12-04 05:28 ` Noah Misch <[email protected]>
2016-12-05 05:19 ` Michael Paquier <[email protected]>
2016-12-05 11:17 ` Dagfinn Ilmari Mannsåker <[email protected]>
2016-12-05 13:15 ` Craig Ringer <[email protected]>
2016-11-17 02:59 ` Kyotaro HORIGUCHI <[email protected]>
2016-11-17 03:16 ` Kyotaro HORIGUCHI <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2021-01-22 00:11 [PATCH 8/8] batch build Tomas Vondra <[email protected]>
2024-06-01 22:08 Fix grammar oddities in comments James Coleman <[email protected]>
2024-06-05 09:34 ` Re: Fix grammar oddities in comments David Rowley <[email protected]>
2024-06-08 22:04 ` Re: Fix grammar oddities in comments Aaron Altman <[email protected]>
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