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Alvaro Herrera 614a406b4f
Fix self-referencing foreign keys with partitioned tables
There are a number of bugs in this area.  Two of them are fixed here,
namely:
1. get_relation_idx_constraint_oid does not restrict the type of
   constraint that's returned, so with sufficient bad luck it can
   return the OID of a foreign key constraint.  This has the effect that
   a primary key in a partition can end up as a child of a foreign key,
   which makes no sense (it needs to be the child of the equivalent
   primary key.)
   Change the API contract so that only index-backed constraints are
   returned, mimicking get_constraint_index().

2. Both CloneFkReferenced and CloneFkReferencing clone a
   self-referencing foreign key, so the partition ends up with
   a duplicate foreign key.  Change the former function to ignore such
   constraints.

Add some tests to verify that things are better now.  (However, these
new tests show some additional misbehavior that will be fixed later --
namely that there's a constraint marked NOT VALID.)

Backpatch to 12, where these constraints are possible at all.

Author: Jehan-Guillaume de Rorthais <jgdr@dalibo.com>
Discussion: https://postgr.es/m/20220603154232.1715b14c@karst
2022-10-07 19:37:48 +02:00
config meson: Add initial version of meson based build system 2022-09-21 22:37:17 -07:00
contrib Remove unnecessary uses of Abs() 2022-10-07 13:29:33 +02:00
doc doc: clarify description for log_startup_progress_interval 2022-10-05 15:53:40 -04:00
src Fix self-referencing foreign keys with partitioned tables 2022-10-07 19:37:48 +02:00
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README

PostgreSQL Database Management System
=====================================

This directory contains the source code distribution of the PostgreSQL
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PostgreSQL is an advanced object-relational database management system
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