Changeset: 62a6040a6bb5 for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=62a6040a6bb5
Modified Files:
sql/server/rel_optimizer.c
Branch: Oct2020
Log Message:
Remove useless rename projections above semijoins and set operations
diffs (13 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
@@ -5514,7 +5514,8 @@ rel_push_project_down(visitor *v, sql_re
}
return rel;
} else if (list_check_prop_all(rel->exps,
(prop_check_func)&exp_is_useless_rename)) {
- if ((is_project(l->op) && list_length(l->exps) ==
list_length(rel->exps)) || is_select(l->op) || is_join(l->op) || is_topn(l->op)
|| is_sample(l->op)) {
+ if ((is_project(l->op) && list_length(l->exps) ==
list_length(rel->exps)) || is_set(l->op) || is_select(l->op)
+ || is_join(l->op) || is_semi(l->op) ||
is_topn(l->op) || is_sample(l->op)) {
rel->l = NULL;
rel_destroy(rel);
v->changes++;
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