[PATCH] Pageinspect - add functions on GIN and GiST indexes from gevel

From: Alexey Chernyshov <a(dot)chernyshov(at)postgrespro(dot)ru>
To: PostgreSQL-Dev <pgsql-hackers(at)postgresql(dot)org>
Subject: [PATCH] Pageinspect - add functions on GIN and GiST indexes from gevel
Date: 2017-07-21 12:05:53
Message-ID: accae316-5e4d-8963-0c3d-277ef13c396c@postgrespro.ru
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Hi all,

the following patch transfers functionality from gevel module
(http://www.sai.msu.su/~megera/wiki/Gevel) which provides functions for
analyzing GIN and GiST indexes to pageinspect. Gevel was originally
designed by Oleg Bartunov, and Teodor Sigaev for developers of GiST and
GIN indexes.

Functions added:
- gist_stat(text) - shows statistics on GiST Tree
- gist_tree(text) - shows GiST tree
- gist_tree(text, int4) - shows GiST tree up to MAXLEVEL
- gist_print(text) - prints objects stored in GiST tree
- spgist_stat(text) - shows statistics on SP-GiST
- spgist_print(text) - prints objects stored in index
- gin_value_count() - originally gin_stat(text) - prints estimated counts
for index values
- gin_stats() - originally gin_statpage(text) - shows statistics
- gin_count_estimate(text, tsquery) - shows number of indexed rows matched
query

Tests also transferred, docs for new functions are added. I run pgindent
over the code, but the result is different from those I expected, so I leave
pgindented one.
The patch is applicable to the commit
866f4a7c210857aa342bf901558d170325094dde.

--
Alexey Chernyshov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company

Attachment Content-Type Size
0001-gevel_to_pageinspect-v1.patch text/x-patch 261.2 KB

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