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Diffstat (limited to 'src/backend/optimizer/plan/planner.c')
| -rw-r--r-- | src/backend/optimizer/plan/planner.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/backend/optimizer/plan/planner.c b/src/backend/optimizer/plan/planner.c index 6047d7c58e5..a49b516141e 100644 --- a/src/backend/optimizer/plan/planner.c +++ b/src/backend/optimizer/plan/planner.c @@ -2689,7 +2689,11 @@ choose_hashed_distinct(PlannerInfo *root, * Don't do it if it doesn't look like the hashtable will fit into * work_mem. */ + + /* Estimate per-hash-entry space at tuple width... */ hashentrysize = MAXALIGN(path_width) + MAXALIGN(sizeof(MinimalTupleData)); + /* plus the per-hash-entry overhead */ + hashentrysize += hash_agg_entry_size(0); if (hashentrysize * dNumDistinctRows > work_mem * 1024L) return false; |