Changeset: 62e78c75e405 for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/62e78c75e405
Modified Files:
sql/server/rel_optimizer.c
Branch: antipush
Log Message:
Don't push up on single joins or selects
diffs (17 lines):
diff --git a/sql/server/rel_optimizer.c b/sql/server/rel_optimizer.c
--- a/sql/server/rel_optimizer.c
+++ b/sql/server/rel_optimizer.c
@@ -4807,10 +4807,10 @@ point_select_on_unique_column(sql_rel *r
static sql_rel *
rel_push_select_up(visitor *v, sql_rel *rel)
{
- if ((is_join(rel->op) || is_semi(rel->op)) && !rel_is_ref(rel)) {
+ if ((is_join(rel->op) || is_semi(rel->op)) && !rel_is_ref(rel) &&
!is_single(rel)) {
sql_rel *l = rel->l, *r = rel->r;
- bool can_pushup_left = is_select(l->op) && !rel_is_ref(l),
- can_pushup_right = is_select(r->op) && !rel_is_ref(r)
&& !is_semi(rel->op);
+ bool can_pushup_left = is_select(l->op) && !rel_is_ref(l) &&
!is_single(l),
+ can_pushup_right = is_select(r->op) && !rel_is_ref(r)
&& !is_single(r) && !is_semi(rel->op);
if (can_pushup_left || can_pushup_right) {
if (can_pushup_left)
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