Horton

Optimize sort and deduplication in ginExtractEntries()

Heikki Linnakangas <heikki.linnakangas@iki.fi>

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Commit: 6f5ad00ab763f9e029ec591f7f650bd09c1e933f
Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
Date: 2026-04-07T10:26:39Z
Releases: 19 (unreleased) 
Optimize sort and deduplication in ginExtractEntries()

Remove NULLs from the array first, and use qsort to deduplicate only
the non-NULL items. This simplifies the comparison function. Also
replace qsort_arg() with a templated version so that the comparison
function can be inlined. These changes make ginExtractEntries() a
little faster especially for simple datatypes like integers.

Author: David Geier <geidav.pg@gmail.com>
Discussion: https://www.postgresql.org/message-id/6d16b6bd-a1ff-4469-aefb-a1c8274e561a@iki.fi

Files

PathChange+/−
src/backend/access/gin/ginutil.c modified +67 −84
src/include/access/gin_private.h modified +1 −1

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