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help / color / mirror / Atom feedFrom: Bruce Momjian <[email protected]>
To: David Rowley <[email protected]>
Cc: Amit Langote <[email protected]>
Cc: PostgreSQL-development <[email protected]>
Subject: Re: PG 18 release notes draft committed
Date: Tue, 6 May 2025 21:17:15 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAApHDvqgK7uqPZAwxsfBiFhvBHHB0txaUxhUrdwG4d5Mik_RnA@mail.gmail.com>
References: <[email protected]>
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<CAApHDvohfoJ0D9eiUuVyHU_kq2Y7A_jAjWVsUt0Fm7Gw1Q=1cQ@mail.gmail.com>
<[email protected]>
<CAApHDvo+BrVTXMBPjNXBTnAovJWN9+-dYc0kN7rSDqdNvpggZQ@mail.gmail.com>
<[email protected]>
<CAApHDvqgK7uqPZAwxsfBiFhvBHHB0txaUxhUrdwG4d5Mik_RnA@mail.gmail.com>
On Wed, May 7, 2025 at 09:27:14AM +1200, David Rowley wrote:
> On Wed, 7 May 2025 at 07:44, Bruce Momjian <[email protected]> wrote:
> > I think what you are saying is that this has to do with partition
> > processing of joins, but not the pruning process. I don't think a
> > non-partition joins are likely to hit 32 EquivalenceClasses.
>
> A query such as: SELECT * FROM table_with_lots_of_partitions ORDER BY
> col; will plan much faster now. No joins there.
Ah, interesting. I am guessing the ORDER BY requires the
EquivalenceClasses items. Applied patch attached. I don't think we can
make more precise wording for this item.
--
Bruce Momjian <[email protected]> https://momjian.us
EDB https://enterprisedb.com
Do not let urgent matters crowd out time for investment in the future.
Attachments:
[text/x-diff] master.diff (600B, ../[email protected]/2-master.diff)
download | inline diff:
diff --git a/doc/src/sgml/release-18.sgml b/doc/src/sgml/release-18.sgml
index 3ff9d9830e9..80cf415bb76 100644
--- a/doc/src/sgml/release-18.sgml
+++ b/doc/src/sgml/release-18.sgml
@@ -397,7 +397,7 @@ Author: David Rowley <[email protected]>
<listitem>
<para>
-Improve the efficiency of joins involving partitions (Ashutosh Bapat, Yuya Watari, David Rowley)
+Improve the efficiency of planning queries accessing many partitions (Ashutosh Bapat, Yuya Watari, David Rowley)
<ulink url="&commit_baseurl;88f55bc97">§</ulink>
<ulink url="&commit_baseurl;d69d45a5a">§</ulink>
</para>
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