Changeset: fc45530e3aae for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/fc45530e3aae
Modified Files:
sql/server/rel_unnest.c
Branch: balanced_union
Log Message:
use first sub relation for projecting the right colunns for a push down of a
semijoin through a munion
diffs (33 lines):
diff --git a/sql/server/rel_unnest.c b/sql/server/rel_unnest.c
--- a/sql/server/rel_unnest.c
+++ b/sql/server/rel_unnest.c
@@ -1194,7 +1194,6 @@ push_up_groupby(mvc *sql, sql_rel *rel,
assert(id);
}
- //assert(rel->op != op_anti);
if (rel->op == op_semi)
rel->op = op_join;
if (rel->op == op_anti) {
@@ -1639,7 +1638,7 @@ push_up_munion(mvc *sql, sql_rel *rel, l
if (need_distinct || need_distinct(s))
set_distinct(ns);
- if (is_join(rel->op)) {
+ if (is_join(rel->op) && !is_semi(rel->op)) {
list *sexps = sa_list(sql->sa), *dexps =
rel_projections(sql, d, NULL, 1, 1);
for (node *m = dexps->h; m; m = m->next) {
sql_exp *e = m->data;
@@ -1653,9 +1652,9 @@ push_up_munion(mvc *sql, sql_rel *rel, l
sql_rel *sl = n->data;
n->data = rel_project(sql->sa, sl,
rel_projections(sql, sl, NULL, 1, 1));
}
- if (is_semi(rel->op)) {
- assert(0);/* looks wrong */
- ns->exps = rel_projections(sql, ns->r, NULL, 1,
1);
+ if (is_semi(rel->op)) { /* only project left of
semi/anti join */
+ sql_rel *sf = rlist->h->data;
+ ns->exps = rel_projections(sql, sf, NULL, 1, 1);
}
if (rel->op == op_anti && s->op == op_munion) {
assert(0); /* needs to convert list in
left/right again ! */
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