Changeset: 7f4298bc94c6 for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/7f4298bc94c6
Modified Files:
sql/server/rel_optimize_proj.c
Branch: balanced_union
Log Message:
Implements push_join_down_munion optimizer WIP 3
diffs (31 lines):
diff --git a/sql/server/rel_optimize_proj.c b/sql/server/rel_optimize_proj.c
--- a/sql/server/rel_optimize_proj.c
+++ b/sql/server/rel_optimize_proj.c
@@ -3799,7 +3799,26 @@ rel_push_join_down_munion(visitor *v, sq
is_munion(r->op) && !need_distinct(r) &&
!is_single(r) &&
!is_semi(rel->op)) {
/* join(a, munion(b,c,d)) -> munion(join(a,b),
join(a,c), join(a,d)) */
- // TODO
+ for (node *n = ((list*)r->l)->h; n; n = n->next) {
+ sql_rel *pc = rel_dup(n->data);
+ if (!is_project(pc->op))
+ pc = rel_project(v->sql->sa, pc,
rel_projections(v->sql, pc, NULL, 1, 1));
+ rel_rename_exps(v->sql, l->exps, pc->exps);
+ if (l != ol) {
+ pc = rel_project(v->sql->sa, pc, NULL);
+ pc->exps = exps_copy(v->sql, ol->exps);
+ set_processed(pc);
+ }
+ pc = rel_crossproduct(v->sql->sa, pc,
rel_dup(or), rel->op);
+ pc->exps = exps_copy(v->sql, exps);
+ pc->attr = exps_copy(v->sql, attr);
+ set_processed(pc);
+ pc = rel_project(v->sql->sa, pc,
rel_projections(v->sql, pc, NULL, 1, 1));
+ n->data = pc;
+ }
+ v->changes++;
+ return rel_inplace_setop_n_ary(v->sql, rel, r->l,
op_munion,
+
rel_projections(v->sql, rel, NULL, 1, 1));
} else if (!is_munion(l->op) &&
is_munion(r->op) && !need_distinct(r) &&
!is_single(r) &&
is_semi(rel->op) && je) {
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