diff options
Diffstat (limited to 'src/backend/optimizer/plan/planmain.c')
| -rw-r--r-- | src/backend/optimizer/plan/planmain.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/backend/optimizer/plan/planmain.c b/src/backend/optimizer/plan/planmain.c index ef0de3fb1a9..74de3b818f7 100644 --- a/src/backend/optimizer/plan/planmain.c +++ b/src/backend/optimizer/plan/planmain.c @@ -193,6 +193,12 @@ query_planner(PlannerInfo *root, List *tlist, joinlist = remove_useless_joins(root, joinlist); /* + * Also, reduce any semijoins with unique inner rels to plain inner joins. + * Likewise, this can't be done until now for lack of needed info. + */ + reduce_unique_semijoins(root); + + /* * Now distribute "placeholders" to base rels as needed. This has to be * done after join removal because removal could change whether a * placeholder is evaluable at a base rel. |