diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/optimizer/path/equivclass.c | 29 | ||||
| -rw-r--r-- | src/include/optimizer/paths.h | 1 |
2 files changed, 0 insertions, 30 deletions
diff --git a/src/backend/optimizer/path/equivclass.c b/src/backend/optimizer/path/equivclass.c index 258302840f8..1681a55c3dc 100644 --- a/src/backend/optimizer/path/equivclass.c +++ b/src/backend/optimizer/path/equivclass.c @@ -943,35 +943,6 @@ is_exprlist_member(Expr *node, List *exprs) } /* - * Find an equivalence class member expression, all of whose Vars, come from - * the indicated relation. - */ -Expr * -find_em_expr_for_rel(EquivalenceClass *ec, RelOptInfo *rel) -{ - ListCell *lc_em; - - foreach(lc_em, ec->ec_members) - { - EquivalenceMember *em = lfirst(lc_em); - - if (bms_is_subset(em->em_relids, rel->relids) && - !bms_is_empty(em->em_relids)) - { - /* - * If there is more than one equivalence member whose Vars are - * taken entirely from this relation, we'll be content to choose - * any one of those. - */ - return em->em_expr; - } - } - - /* We didn't find any suitable equivalence class expression */ - return NULL; -} - -/* * relation_can_be_sorted_early * Can this relation be sorted on this EC before the final output step? * diff --git a/src/include/optimizer/paths.h b/src/include/optimizer/paths.h index 2ffa24aa899..3d95e6bfc88 100644 --- a/src/include/optimizer/paths.h +++ b/src/include/optimizer/paths.h @@ -144,7 +144,6 @@ extern EquivalenceMember *find_computable_ec_member(PlannerInfo *root, List *exprs, Relids relids, bool require_parallel_safe); -extern Expr *find_em_expr_for_rel(EquivalenceClass *ec, RelOptInfo *rel); extern bool relation_can_be_sorted_early(PlannerInfo *root, RelOptInfo *rel, EquivalenceClass *ec, bool require_parallel_safe); |