Enable hash partitioning of text arrays
hash_array_extended() needs to pass PG_GET_COLLATION() to the hash
function of the element type. Otherwise, the hash function of a
collation-aware data type such as text will error out, since the
introduction of nondeterministic collation made hash functions require
a collation, too.
The consequence of this is that before this change, hash partitioning
using an array over text in the partition key would not work.
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://www.postgresql.org/message-id/flat/32c1fdae-95c6-5dc6-058a-a90330a3b621%40enterprisedb.com
Branch
------
REL_12_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/ea9087938131ae0da822ccb96c2d8dc71c177f53
Modified Files
--------------
src/backend/utils/adt/arrayfuncs.c | 2 +-
src/test/regress/expected/collate.icu.utf8.out | 50 ++++++++++++++++++++++++++
src/test/regress/sql/collate.icu.utf8.sql | 26 ++++++++++++++
3 files changed, 77 insertions(+), 1 deletion(-)