postgresql/contrib/pageinspect
Michael Paquier e7bff46e50 pageinspect: Fix gist_page_items() with included columns
Non-leaf pages of GiST indexes contain key attributes, leaf pages
contain both key and non-key attributes, and gist_page_items() ignored
the handling of non-key attributes.  This caused a few problems when
using gist_page_items() on a GiST index with INCLUDE:
- On a non-leaf page, the function would crash.
- On a leaf page, the function would work, but miss to display all the
values for included attributes.

This commit fixes gist_page_items() to handle such cases in a more
appropriate way, and now displays the values of key and non-key
attributes for each item separately in a style consistent with what
ruleutils.c would generate for the attribute list, depending on the page
type dealt with.  In a way similar to how a record is displayed, values
would be double-quoted for key or non-key attributes if required.

ruleutils.c did not provide a routine able to control if non-key
attributes should be displayed, so an extended() routine for index
definitions is added to work around the leaf and non-leaf page
differences.

While on it, this commit fixes a third problem related to the amount of
data reported for key attributes.  The code originally relied on
BuildIndexValueDescription() (used for error reports on constraints)
that would not print all the data stored in the index but the index
opclass's input type, so this limited the amount of information
available.  This switch makes gist_page_items() much cheaper as there is
no need to run ACL checks for each item printed, which is not an issue
anyway as superuser rights are required to execute the functions of
pageinspect.  Opclasses whose data cannot be displayed can rely on
gist_page_items_bytea().

The documentation of this function was slightly incorrect for the
output results generated on HEAD and v15, so adjust it on these
branches.

Author: Alexander Lakhin, Michael Paquier
Discussion: https://postgr.es/m/17884-cb8c326522977acb@postgresql.org
Backpatch-through: 14
2023-05-19 12:37:58 +09:00
..
expected pageinspect: Fix gist_page_items() with included columns 2023-05-19 12:37:58 +09:00
sql pageinspect: Fix gist_page_items() with included columns 2023-05-19 12:37:58 +09:00
.gitignore pageinspect: Add tests 2016-11-01 14:02:16 -04:00
brinfuncs.c Show empty BRIN ranges in brin_page_items 2023-05-19 02:00:21 +02:00
btreefuncs.c Consolidate ItemPointer to Datum conversion functions 2023-02-13 09:57:15 +01:00
fsmfuncs.c Update copyright for 2023 2023-01-02 15:00:37 -05:00
ginfuncs.c Consolidate ItemPointer to Datum conversion functions 2023-02-13 09:57:15 +01:00
gistfuncs.c pageinspect: Fix gist_page_items() with included columns 2023-05-19 12:37:58 +09:00
hashfuncs.c Update copyright for 2023 2023-01-02 15:00:37 -05:00
heapfuncs.c Update copyright for 2023 2023-01-02 15:00:37 -05:00
Makefile Add bt_multi_page_stats() function to contrib/pageinspect. 2023-01-02 13:02:29 -05:00
meson.build Update copyright for 2023 2023-01-02 15:00:37 -05:00
pageinspect--1.0--1.1.sql Fix typos in some error messages thrown by extension scripts when fed to psql. 2014-08-25 18:30:37 +02:00
pageinspect--1.1--1.2.sql Fix typos in some error messages thrown by extension scripts when fed to psql. 2014-08-25 18:30:37 +02:00
pageinspect--1.2--1.3.sql pageinspect/BRIN: minor tweaks 2014-12-02 12:20:50 -03:00
pageinspect--1.3--1.4.sql Add forgotten file in commit d6061f83a1 2015-11-25 16:59:07 +03:00
pageinspect--1.4--1.5.sql Update pageinspect extension for parallel query. 2016-06-09 17:18:09 -04:00
pageinspect--1.5--1.6.sql pageinspect: Add bt_page_items function with bytea argument 2017-04-04 23:52:55 -04:00
pageinspect--1.5.sql Update pageinspect extension for parallel query. 2016-06-09 17:18:09 -04:00
pageinspect--1.6--1.7.sql Skip full index scan during cleanup of B-tree indexes when possible 2018-04-04 19:29:00 +03:00
pageinspect--1.7--1.8.sql pageinspect: Fix types used for bt_metap() columns. 2020-03-07 16:44:53 -08:00
pageinspect--1.8--1.9.sql Use full 64-bit XIDs in deleted nbtree pages. 2021-02-24 18:41:34 -08:00
pageinspect--1.9--1.10.sql pageinspect: Improve page_header() for pages of 32kB 2021-07-12 11:05:27 +09:00
pageinspect--1.10--1.11.sql Mark pageinspect's disk-accessing functions as parallel restricted. 2022-11-21 15:37:10 -05:00
pageinspect--1.11--1.12.sql Show empty BRIN ranges in brin_page_items 2023-05-19 02:00:21 +02:00
pageinspect.control Add bt_multi_page_stats() function to contrib/pageinspect. 2023-01-02 13:02:29 -05:00
pageinspect.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
rawpage.c Update copyright for 2023 2023-01-02 15:00:37 -05:00