MonetDB: label - fixed issue on overwriting list with empty list

[Niels Nes via checkin-list]

Changeset: 7350a992e0f3 for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/7350a992e0f3
Modified Files:
        sql/server/rel_optimize_sel.c
Branch: label
Log Message:

fixed issue on overwriting list with empty list


diffs (12 lines):

diff --git a/sql/server/rel_optimize_sel.c b/sql/server/rel_optimize_sel.c
--- a/sql/server/rel_optimize_sel.c
+++ b/sql/server/rel_optimize_sel.c
@@ -3338,7 +3338,7 @@ rel_push_select_down(visitor *v, sql_rel
        node *n;
 
        if (rel_is_ref(rel)) {
-               if (is_select(rel->op) && rel->exps) {
+               if (is_select(rel->op) && !list_empty(rel->exps)) {
                        /* add inplace empty select */
                        sql_rel *l = rel_select(v->sql->sa, rel->l, NULL);
 
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