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Peter Eisentraut 3c49fa2aff Check collation when creating partitioned index 
When creating a partitioned index, the partition key must be a subset
of the index's columns.  But this currently doesn't check that the
collations between the partition key and the index definition match.
So you can construct a unique index that fails to enforce uniqueness.
(This would most likely involve a nondeterministic collation, so it
would have to be crafted explicitly and is not something that would
just happen by accident.)

This patch adds the required collation check.  As a result, any
previously allowed unique index that has a collation mismatch would no
longer be allowed to be created.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/3327cb54-f7f1-413b-8fdb-7a9dceebb938%40eisentraut.org
 		2023-12-01 16:23:18 +01:00
config Log LLVM library version in configure output. 2023-10-22 14:32:31 +13:00
contrib Adjust the order of the prechecks in pgrowlocks() 2023-10-31 16:44:00 +13:00
doc Fix CREATE INDEX CONCURRENTLY example 2023-11-27 19:18:03 +01:00
src Check collation when creating partitioned index 2023-12-01 16:23:18 +01:00
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README 

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/.