pg.ddx.io  pgsql-hackers@postgresql.org mailing list archive  

help / color / mirror / Atom feed
From: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
To: Jesper Pedersen <jesper.pedersen@redhat.com>
To: Michael Paquier <michael.paquier@gmail.com>
Cc: Ashutosh Sharma <ashu.coek88@gmail.com>
Cc: Jeff Janes <jeff.janes@gmail.com>
Cc: Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Subject: Re: pageinspect: Hash index support
Date: Fri, 23 Sep 2016 00:10:12 -0400
Message-ID: <80a00b5c-56d3-dffb-8dba-edf5d2167b12@2ndquadrant.com> (raw)
In-Reply-To: <d235dcd6-146a-1269-73a0-da9a55bfeddc@redhat.com>
References: <e2ac6c58-b93f-9dd9-f4e6-d6d30add7fdf@redhat.com>
	<20160830170633.GA508711@alvherre.pgsql>
	<CAMkU=1wghadVOxkphJTQUqukgNkE7ETPci0g55Y+fqXO4Q43PQ@mail.gmail.com>
	<0f99b6b0-0e54-0f6e-9502-f8cb6f194c17@redhat.com>
	<CAB7nPqSLVbe-wXCd77CMx6vHKfRd6thUwv7nzP54Lv9k4Q6hww@mail.gmail.com>
	<3493caf5-6d50-8915-7612-bd830972f513@redhat.com>
	<CAMkU=1weMVE+Re7NQyAtXT5g6E5Fziw9PVU9UDapb0AG5MH=YQ@mail.gmail.com>
	<CAE9k0Pk4dC9VrzV7Vm6em7JFzRMGfzx2=eYu0Yb_Psga-W47Ww@mail.gmail.com>
	<e1bda3f7-dc99-c610-4d48-58815f5b7515@redhat.com>
	<CAE9k0P=OQSEj0x9z91tvE9P1f-Ht7x7z8X+eDWQGTJNSFbn9yg@mail.gmail.com>
	<5d64a536-cc90-ce96-b68f-5b6bd3206476@redhat.com>
	<CAB7nPqTT3ZEm8QKsYYxfUnWL+P3p2mAbud7AFiZpK_JKx3eADA@mail.gmail.com>
	<d235dcd6-146a-1269-73a0-da9a55bfeddc@redhat.com>
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-hackers>

On 9/21/16 9:30 AM, Jesper Pedersen wrote:
> Attached is v5, which add basic page verification.

There are still some things that I found that appear to follow the old
style (btree) conventions instead the new style (brin, gin) conventions.

- Rename hash_metap to hash_metapage_info.

- Don't use BuildTupleFromCStrings().  (There is nothing inherently
wrong with it, but why convert numbers to strings and back again when it
can be done more directly.)

- Documentation for hash_page_stats still has blkno argument.

- In hash_metap, the magic field could be type bytea, so that it
displays in hex.  Or text like the brin functions.

Some other comments:

- hash_metap result fields spares and mapp should be arrays of integer.

(Incidentally, the comment in hash.h talks about bitmaps[] but I think
it means hashm_mapp[].)

- As of very recently, we don't need to move pageinspect--1.5.sql to
pageinspect--1.6.sql anymore.  Just add pageinspect--1.5--1.6.sql.

- In the documentation for hash_page_stats(), the "+" sign is misaligned.

- In hash_page_items, the fields itemlen, nulls, vars are always 16,
false, false.  So perhaps there is no need for them.  Similarly, the
hash_page_stats in hash_page_stats is always 16.

- The data field could be of type bytea.

- Add a pointer in the documentation to the relevant header file.

Bonus:

- Add subsections in the documentation (general functions, B-tree
functions, etc.)

- Add tests.

-- 
Peter Eisentraut              http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services


-- 
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers



view thread (110+ messages)  latest in thread

Message-ID: <80a00b5c-56d3-dffb-8dba-edf5d2167b12@2ndquadrant.com>
Permalink:  ../80a00b5c-56d3-dffb-8dba-edf5d2167b12@2ndquadrant.com/
Also on:    postgresql.org/message-id/80a00b5c-56d3-dffb-8dba-edf5d2167b12@2ndquadrant.com

 · 

reply
Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: pgsql-hackers@postgresql.org
  Cc: peter.eisentraut@2ndquadrant.com, jesper.pedersen@redhat.com, michael.paquier@gmail.com, ashu.coek88@gmail.com, jeff.janes@gmail.com, alvherre@2ndquadrant.com
  Subject: Re: pageinspect: Hash index support
  In-Reply-To: <80a00b5c-56d3-dffb-8dba-edf5d2167b12@2ndquadrant.com>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox