diff options
| author | Jeff Davis <jdavis@postgresql.org> | 2020-02-06 11:49:56 -0800 |
|---|---|---|
| committer | Jeff Davis <jdavis@postgresql.org> | 2020-02-06 11:49:56 -0800 |
| commit | 7d4395d0a11589aa450a073d658c49b420f4493f (patch) | |
| tree | b9be6165922e73d2351d8565f9051184ae56f036 /src/backend/optimizer/plan/planner.c | |
| parent | c02fdc9223015c5c386abfa00c47fc7f4c845161 (diff) | |
| download | postgresql-7d4395d0a11589aa450a073d658c49b420f4493f.tar.gz postgresql-7d4395d0a11589aa450a073d658c49b420f4493f.zip | |
Refactor hash_agg_entry_size().
Consolidate the calculations for hash table size estimation. This will
help with upcoming Hash Aggregation work that will add additional call
sites.
Diffstat (limited to 'src/backend/optimizer/plan/planner.c')
| -rw-r--r-- | src/backend/optimizer/plan/planner.c | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/src/backend/optimizer/plan/planner.c b/src/backend/optimizer/plan/planner.c index d6f21535937..b44efd6314c 100644 --- a/src/backend/optimizer/plan/planner.c +++ b/src/backend/optimizer/plan/planner.c @@ -4867,13 +4867,8 @@ create_distinct_paths(PlannerInfo *root, allow_hash = false; /* policy-based decision not to hash */ else { - Size hashentrysize; - - /* Estimate per-hash-entry space at tuple width... */ - hashentrysize = MAXALIGN(cheapest_input_path->pathtarget->width) + - MAXALIGN(SizeofMinimalTupleHeader); - /* plus the per-hash-entry overhead */ - hashentrysize += hash_agg_entry_size(0); + Size hashentrysize = hash_agg_entry_size( + 0, cheapest_input_path->pathtarget->width, 0); /* Allow hashing only if hashtable is predicted to fit in work_mem */ allow_hash = (hashentrysize * numDistinctRows <= work_mem * 1024L); |