diff options
Diffstat (limited to 'src/backend/optimizer/plan/planner.c')
| -rw-r--r-- | src/backend/optimizer/plan/planner.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/backend/optimizer/plan/planner.c b/src/backend/optimizer/plan/planner.c index 2eb862e2080..1da4b2f7c9a 100644 --- a/src/backend/optimizer/plan/planner.c +++ b/src/backend/optimizer/plan/planner.c @@ -2659,7 +2659,9 @@ choose_hashed_grouping(PlannerInfo *root, * Executor doesn't support hashed aggregation with DISTINCT or ORDER BY * aggregates. (Doing so would imply storing *all* the input values in * the hash table, and/or running many sorts in parallel, either of which - * seems like a certain loser.) + * seems like a certain loser.) We similarly don't support ordered-set + * aggregates in hashed aggregation, but that case is included in the + * numOrderedAggs count. */ can_hash = (agg_costs->numOrderedAggs == 0 && grouping_is_hashable(parse->groupClause)); |