diff options
Diffstat (limited to 'src/backend/optimizer/plan/setrefs.c')
| -rw-r--r-- | src/backend/optimizer/plan/setrefs.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/backend/optimizer/plan/setrefs.c b/src/backend/optimizer/plan/setrefs.c index dc11f098e0f..329ebd5f287 100644 --- a/src/backend/optimizer/plan/setrefs.c +++ b/src/backend/optimizer/plan/setrefs.c @@ -107,6 +107,7 @@ static Plan *set_append_references(PlannerInfo *root, static Plan *set_mergeappend_references(PlannerInfo *root, MergeAppend *mplan, int rtoffset); +static void set_hash_references(PlannerInfo *root, Plan *plan, int rtoffset); static Node *fix_scan_expr(PlannerInfo *root, Node *node, int rtoffset); static Node *fix_scan_expr_mutator(Node *node, fix_scan_expr_context *context); static bool fix_scan_expr_walker(Node *node, fix_scan_expr_context *context); @@ -646,6 +647,9 @@ set_plan_refs(PlannerInfo *root, Plan *plan, int rtoffset) break; case T_Hash: + set_hash_references(root, plan, rtoffset); + break; + case T_Material: case T_Sort: case T_Unique: @@ -1419,6 +1423,36 @@ set_mergeappend_references(PlannerInfo *root, return (Plan *) mplan; } +/* + * set_hash_references + * Do set_plan_references processing on a Hash node + */ +static void +set_hash_references(PlannerInfo *root, Plan *plan, int rtoffset) +{ + Hash *hplan = (Hash *) plan; + Plan *outer_plan = plan->lefttree; + indexed_tlist *outer_itlist; + + /* + * Hash's hashkeys are used when feeding tuples into the hashtable, + * therefore have them reference Hash's outer plan (which itself is the + * inner plan of the HashJoin). + */ + outer_itlist = build_tlist_index(outer_plan->targetlist); + hplan->hashkeys = (List *) + fix_upper_expr(root, + (Node *) hplan->hashkeys, + outer_itlist, + OUTER_VAR, + rtoffset); + + /* Hash doesn't project */ + set_dummy_tlist_references(plan, rtoffset); + + /* Hash nodes don't have their own quals */ + Assert(plan->qual == NIL); +} /* * copyVar @@ -1754,6 +1788,16 @@ set_join_references(PlannerInfo *root, Join *join, int rtoffset) inner_itlist, (Index) 0, rtoffset); + + /* + * HashJoin's hashkeys are used to look for matching tuples from its + * outer plan (not the Hash node!) in the hashtable. + */ + hj->hashkeys = (List *) fix_upper_expr(root, + (Node *) hj->hashkeys, + outer_itlist, + OUTER_VAR, + rtoffset); } /* |