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Álvaro Herrera b0f0e2221f
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 Log LLVM library version in configure output. 2023-10-22 14:32:31 +13:00
contrib Fix cache-dependent test failures in logical decoding. 2025-06-24 07:07:40 -07:00
doc doc: Remove incorrect note about wal_status in pg_replication_slots. 2025-07-03 16:07:23 +09:00
src pg_upgrade: check for inconsistencies in not-null constraints w/inheritance 2025-07-04 18:05:43 +02:00
.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 Backpatch addition of .git-blame-ignore-revs 2022-08-05 19:36:24 +02:00
.gitattributes Exclude LLVM files from whitespace checks 2024-11-27 11:10:42 +01:00
.gitignore Add portlock directory to .gitignore 2022-11-26 07:47:16 -05:00
aclocal.m4 Probe $PROVE not $PERL while checking for modules needed by TAP tests. 2021-11-22 12:54:52 -05:00
configure Make our usage of memset_s() conform strictly to the C11 standard. 2025-05-18 12:45:55 -04:00
configure.in 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 Remove temporary portlock directory during make [dist]clean. 2022-11-26 10:30:58 -05:00
HISTORY Canonicalize some URLs 2020-02-10 20:47:50 +01:00
Makefile Don't unset MAKEFLAGS in non-GNU Makefile. 2019-06-25 09:36:21 +12:00
README Canonicalize some URLs 2020-02-10 20:47:50 +01:00
README.git Canonicalize some URLs 2020-02-10 20:47:50 +01:00

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.

PostgreSQL has many language interfaces, many of which are listed here:

	https://www.postgresql.org/download/

See the file INSTALL for instructions on how to build and install
PostgreSQL.  That file also lists supported operating systems and
hardware platforms and contains information regarding any other
software packages that are required to build or run the PostgreSQL
system.  Copyright and license information can be found in the
file COPYRIGHT.  A comprehensive documentation set is included in this
distribution; it can be read as described in the installation
instructions.

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