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Álvaro Herrera b8b2e60527
pg_upgrade: check for inconsistencies in not-null constraints w/inheritance
With tables defined like this,
  CREATE TABLE ip (id int PRIMARY KEY);
  CREATE TABLE ic (id int) INHERITS (ip);
  ALTER TABLE ic ALTER id DROP NOT NULL;

pg_upgrade fails during the schema restore phase due to this error:
  ERROR: column "id" in child table must be marked NOT NULL

This can only be fixed by marking the child column as NOT NULL before
the upgrade, which could take an arbitrary amount of time (because ic's
data must be scanned).  Have pg_upgrade's check mode warn if that
condition is found, so that users know what to adjust before running the
upgrade for real.

Author: Ali Akbar <the.apaan@gmail.com>
Reviewed-by: Justin Pryzby <pryzby@telsasoft.com>
Backpatch-through: 13
Discussion: https://postgr.es/m/CACQjQLoMsE+1pyLe98pi0KvPG2jQQ94LWJ+PTiLgVRK4B=i_jg@mail.gmail.com
2025-07-04 18:05:43 +02:00
config jit: Remove {llvm-config,clang}-N configure probes. 2024-05-16 13:58:25 +12:00
contrib Fix re-distributing previously distributed invalidation messages during logical decoding. 2025-06-16 17:35:58 -07:00
doc doc: Update outdated descriptions of wal_status in pg_replication_slots. 2025-07-03 23:09:14 +09:00
src pg_upgrade: check for inconsistencies in not-null constraints w/inheritance 2025-07-04 18:05:43 +02:00
.cirrus.star Remove duplicate words in docs and code comments. 2023-10-09 09:18:47 +05:30
.cirrus.tasks.yml ci: Upgrade FreeBSD image 2025-03-05 10:29:08 -05:00
.cirrus.yml ci: Make compute resources for CI configurable 2023-08-23 15:15:28 -07:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
.editorconfig Add .editorconfig 2019-12-18 09:13:13 +01:00
.git-blame-ignore-revs Add commit 7229ebe011 to .git-blame-ignore-revs. 2024-09-14 20:17:30 +02:00
.gitattributes Exclude LLVM files from whitespace checks 2024-11-27 11:09:27 +01:00
.gitignore Update top-level .gitignore. 2022-12-04 15:23:00 -05:00
aclocal.m4 autoconf: Move export_dynamic determination to configure 2022-12-06 18:55:28 -08:00
configure Make our usage of memset_s() conform strictly to the C11 standard. 2025-05-18 12:45:55 -04:00
configure.ac Make our usage of memset_s() conform strictly to the C11 standard. 2025-05-18 12:45:55 -04:00
COPYRIGHT Align organization wording in copyright statement 2025-05-16 11:20:07 -04:00
GNUmakefile.in Allow selecting the git revision to be packaged by "make dist". 2024-05-03 11:08:50 -04:00
HISTORY Canonicalize some URLs 2020-02-10 20:47:50 +01:00
Makefile Adapt REL_17_STABLE to its new status as a stable branch 2024-07-01 08:05:35 +09:00
meson.build meson: Fix meson warning 2025-06-22 14:15:35 +02:00
meson_options.txt Allow selecting the git revision to be packaged by "make dist". 2024-05-03 11:08:50 -04:00
README.md Adapt REL_17_STABLE to its new status as a stable branch 2024-07-01 08:05:35 +09:00

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/17/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/17/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/.