diff options
Diffstat (limited to 'src/backend/optimizer')
| -rw-r--r-- | src/backend/optimizer/plan/analyzejoins.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/src/backend/optimizer/plan/analyzejoins.c b/src/backend/optimizer/plan/analyzejoins.c index b1e173c63bc..8a8d4a2af33 100644 --- a/src/backend/optimizer/plan/analyzejoins.c +++ b/src/backend/optimizer/plan/analyzejoins.c @@ -1083,9 +1083,10 @@ query_supports_distinctness(Query *query) * the values are distinct. (Note: the opids entries could be cross-type * operators, and thus not exactly the equality operators that the subquery * would use itself. We use equality_ops_are_compatible() to check - * compatibility. That looks at btree or hash opfamily membership, and so - * should give trustworthy answers for all operators that we might need - * to deal with here.) + * compatibility. That looks at opfamily membership for index AMs that have + * declared that they support consistent equality semantics within an + * opfamily, and so should give trustworthy answers for all operators that we + * might need to deal with here.) */ bool query_is_distinct_for(Query *query, List *colnos, List *opids) |