diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/utils/adt/selfuncs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/backend/utils/adt/selfuncs.c b/src/backend/utils/adt/selfuncs.c index 30751fc8ac6..a6555e91b77 100644 --- a/src/backend/utils/adt/selfuncs.c +++ b/src/backend/utils/adt/selfuncs.c @@ -3540,7 +3540,7 @@ estimate_hash_bucketsize(PlannerInfo *root, Node *hashkey, double nbuckets) * XXX Possibly better way, but much more expensive: multiply by * selectivity of rel's restriction clauses that mention the target Var. */ - if (vardata.rel) + if (vardata.rel && vardata.rel->tuples > 0) { ndistinct *= vardata.rel->rows / vardata.rel->tuples; ndistinct = clamp_row_est(ndistinct); |