Noah Misch f4ece891fc Assert lack of hazardous buffer locks before possible catalog read.
Commit 0bada39c83a150079567a6e97b1a25a198f30ea3 fixed a bug of this kind,
which existed in all branches for six days before detection.  While the
probability of reaching the trouble was low, the disruption was extreme.  No
new backends could start, and service restoration needed an immediate
shutdown.  Hence, add this to catch the next bug like it.

The new check in RelationIdGetRelation() suffices to make autovacuum detect
the bug in commit 243e9b40f1b2dd09d6e5bf91ebf6e822a2cd3704 that led to commit
0bada39.  This also checks in a number of similar places.  It replaces each
Assert(IsTransactionState()) that pertained to a conditional catalog read.

No back-patch for now, but a back-patch of commit 243e9b4 should back-patch
this, too.  A back-patch could omit the src/test/regress changes, since back
branches won't gain new index columns.

Reported-by: Alexander Lakhin <exclusion@gmail.com>
Discussion: https://postgr.es/m/20250410191830.0e.nmisch@google.com
Discussion: https://postgr.es/m/10ec0bc3-5933-1189-6bb8-5dec4114558e@gmail.com
2025-04-17 05:00:30 -07:00
2025-04-09 12:41:54 +02:00
2025-04-14 08:56:33 +02:00
2025-04-15 21:32:18 +02:00
2025-02-12 09:40:07 -05:00
2022-12-04 15:23:00 -05:00
2024-11-05 13:56:02 +01:00
2025-04-07 23:08:17 +02:00
2025-01-01 11:21:55 -05:00
2020-02-10 20:47:50 +01:00
2024-02-28 15:17:23 +04:00

PostgreSQL Database Management System

This directory contains the source code distribution of the PostgreSQL database management system.

PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.

Copyright and license information can be found in the file COPYRIGHT.

General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.

The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.

Description
he World's Most Advanced Open Source Relational Database.
Readme 742 MiB
Languages
C 85.3%
PLpgSQL 5.9%
Perl 4.4%
Yacc 1.2%
Meson 0.7%
Other 2.2%