diff options
Diffstat (limited to 'src/backend/optimizer/plan/analyzejoins.c')
| -rw-r--r-- | src/backend/optimizer/plan/analyzejoins.c | 31 |
1 files changed, 0 insertions, 31 deletions
diff --git a/src/backend/optimizer/plan/analyzejoins.c b/src/backend/optimizer/plan/analyzejoins.c index 928d926645e..5bc16c4bfc7 100644 --- a/src/backend/optimizer/plan/analyzejoins.c +++ b/src/backend/optimizer/plan/analyzejoins.c @@ -116,37 +116,6 @@ restart: } /* - * clause_sides_match_join - * Determine whether a join clause is of the right form to use in this join. - * - * We already know that the clause is a binary opclause referencing only the - * rels in the current join. The point here is to check whether it has the - * form "outerrel_expr op innerrel_expr" or "innerrel_expr op outerrel_expr", - * rather than mixing outer and inner vars on either side. If it matches, - * we set the transient flag outer_is_left to identify which side is which. - */ -static inline bool -clause_sides_match_join(RestrictInfo *rinfo, Relids outerrelids, - Relids innerrelids) -{ - if (bms_is_subset(rinfo->left_relids, outerrelids) && - bms_is_subset(rinfo->right_relids, innerrelids)) - { - /* lefthand side is outer */ - rinfo->outer_is_left = true; - return true; - } - else if (bms_is_subset(rinfo->left_relids, innerrelids) && - bms_is_subset(rinfo->right_relids, outerrelids)) - { - /* righthand side is outer */ - rinfo->outer_is_left = false; - return true; - } - return false; /* no good for these input relations */ -} - -/* * join_is_removable * Check whether we need not perform this special join at all, because * it will just duplicate its left input. |