add materialized view feature to opengauss

2020-08-17 11:48:18 +08:00
parent 3eade03f9c
commit d5337ceca7
120 changed files with 3796 additions and 823 deletions
--- a/src/gausskernel/optimizer/path/allpaths.cpp
+++ b/src/gausskernel/optimizer/path/allpaths.cpp
@ -1768,7 +1768,9 @@ static void set_subquery_pathlist(PlannerInfo* root, RelOptInfo* rel, Index rti,
    /*
     * It's possible that constraint exclusion proved the subquery empty. If
     * so, it's convenient to turn it back into a dummy path so that we will
-     * recognize appropriate optimizations at this level.
+     * recognize appropriate optimizations at this query level.  (But see
+     * create_append_plan in createplan.c, which has to reverse this
+     * substitution.)
     */
    if (is_dummy_plan(rel->subplan)) {
        set_dummy_rel_pathlist(rel);