diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/optimizer/path/equivclass.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/src/backend/optimizer/path/equivclass.c b/src/backend/optimizer/path/equivclass.c index acc4fb1a185..469d376ad29 100644 --- a/src/backend/optimizer/path/equivclass.c +++ b/src/backend/optimizer/path/equivclass.c @@ -1785,14 +1785,11 @@ add_child_rel_equivalences(PlannerInfo *root, ListCell *lc2; /* - * If this EC contains a constant, then it's not useful for sorting or - * driving an inner index-scan, so we skip generating child EMs. - * * If this EC contains a volatile expression, then generating child - * EMs would be downright dangerous. We rely on a volatile EC having - * only one EM. + * EMs would be downright dangerous, so skip it. We rely on a + * volatile EC having only one EM. */ - if (cur_ec->ec_has_const || cur_ec->ec_has_volatile) + if (cur_ec->ec_has_volatile) continue; /* No point in searching if parent rel not mentioned in eclass */ |