MonetDB: Oct2020 - Don't go easy on topN/sample relations

[Pedro Ferreira]

Changeset: 44beeb9c3c11 for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=44beeb9c3c11
Modified Files:
        sql/server/rel_optimizer.c
Branch: Oct2020
Log Message:

Don't go easy on topN/sample relations


diffs (14 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
@@ -5591,8 +5591,8 @@ 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)) ||
-                                       ((v->parent && 
is_project(v->parent->op)) && (is_set(l->op) || is_select(l->op) || 
is_join(l->op) || is_semi(l->op))) ||
-                                       is_topn(l->op) || is_sample(l->op)) {
+                               ((v->parent && is_project(v->parent->op)) &&
+                                (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++;
_______________________________________________
checkin-list mailing list
checkin-list@monetdb.org
https://www.monetdb.org/mailman/listinfo/checkin-list