Changeset: c56e9d2702ac for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/c56e9d2702ac
Modified Files:
sql/server/rel_optimize_proj.c
Branch: default
Log Message:
join_push_down optimizert handles ref replica table cases
diffs (24 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
@@ -3069,6 +3069,20 @@ rel_push_join_down_union(visitor *v, sql
list *exps = rel->exps, *attr = rel->attr;
sql_exp *je = NULL;
+ /* we would like to optimize in place reference rels which point
+ * to replica tables and let the replica optimizer handle those
+ * later. otherwise we miss the push join down optimization due
+ * to the rel_is_ref bailout
+ */
+ if (rel_is_ref(l) && is_basetable(l->op) && l->l &&
isReplicaTable((sql_table*)l->l)) {
+ rel->l = rel_copy(v->sql, l, true);
+ rel_destroy(l);
+ }
+ if (rel_is_ref(r) && is_basetable(r->op) && r->l &&
isReplicaTable((sql_table*)r->l)) {
+ rel->r = rel_copy(v->sql, r, true);
+ rel_destroy(r);
+ }
+
if (!l || !r || need_distinct(l) || need_distinct(r) ||
rel_is_ref(l) || rel_is_ref(r))
return rel;
if (l->op == op_project)
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