From d5d74b732a860f477219f28a18d7a1aece26a182 Mon Sep 17 00:00:00 2001 From: Tomas Vondra Date: Wed, 19 Jun 2024 13:23:48 +0200 Subject: [PATCH v20240619 04/11] fixup: clarify tuplesort_begin_index_gin --- src/backend/utils/sort/tuplesortvariants.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/src/backend/utils/sort/tuplesortvariants.c b/src/backend/utils/sort/tuplesortvariants.c index 060fb64164f..0f0c1d71027 100644 --- a/src/backend/utils/sort/tuplesortvariants.c +++ b/src/backend/utils/sort/tuplesortvariants.c @@ -606,7 +606,13 @@ tuplesort_begin_index_gin(int workMem, SortCoordinate coordinate, sortopt & TUPLESORT_RANDOMACCESS ? 't' : 'f'); #endif - base->nKeys = 1; /* Only the index key */ + /* + * Only one sort column, the index key. + * + * Multi-column GIN indexes store the value of each attribute separate + * index entries, so each entry has a single sort key. + */ + base->nKeys = 1; base->removeabbrev = removeabbrev_index_gin; base->comparetup = comparetup_index_gin; -- 2.45.2