diff options
Diffstat (limited to 'src/backend/optimizer/plan/createplan.c')
| -rw-r--r-- | src/backend/optimizer/plan/createplan.c | 69 |
1 files changed, 65 insertions, 4 deletions
diff --git a/src/backend/optimizer/plan/createplan.c b/src/backend/optimizer/plan/createplan.c index 7ed718f0b31..ae51505954f 100644 --- a/src/backend/optimizer/plan/createplan.c +++ b/src/backend/optimizer/plan/createplan.c @@ -10,7 +10,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/optimizer/plan/createplan.c,v 1.215 2006/07/26 00:34:48 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/optimizer/plan/createplan.c,v 1.216 2006/08/02 01:59:45 joe Exp $ * *------------------------------------------------------------------------- */ @@ -59,6 +59,8 @@ static SubqueryScan *create_subqueryscan_plan(PlannerInfo *root, Path *best_path List *tlist, List *scan_clauses); static FunctionScan *create_functionscan_plan(PlannerInfo *root, Path *best_path, List *tlist, List *scan_clauses); +static ValuesScan *create_valuesscan_plan(PlannerInfo *root, Path *best_path, + List *tlist, List *scan_clauses); static NestLoop *create_nestloop_plan(PlannerInfo *root, NestPath *best_path, Plan *outer_plan, Plan *inner_plan); static MergeJoin *create_mergejoin_plan(PlannerInfo *root, MergePath *best_path, @@ -95,6 +97,8 @@ static TidScan *make_tidscan(List *qptlist, List *qpqual, Index scanrelid, List *tidquals); static FunctionScan *make_functionscan(List *qptlist, List *qpqual, Index scanrelid); +static ValuesScan *make_valuesscan(List *qptlist, List *qpqual, + Index scanrelid); static BitmapAnd *make_bitmap_and(List *bitmapplans); static BitmapOr *make_bitmap_or(List *bitmapplans); static NestLoop *make_nestloop(List *tlist, @@ -146,6 +150,7 @@ create_plan(PlannerInfo *root, Path *best_path) case T_TidScan: case T_SubqueryScan: case T_FunctionScan: + case T_ValuesScan: plan = create_scan_plan(root, best_path); break; case T_HashJoin: @@ -262,6 +267,13 @@ create_scan_plan(PlannerInfo *root, Path *best_path) scan_clauses); break; + case T_ValuesScan: + plan = (Plan *) create_valuesscan_plan(root, + best_path, + tlist, + scan_clauses); + break; + default: elog(ERROR, "unrecognized node type: %d", (int) best_path->pathtype); @@ -315,12 +327,13 @@ use_physical_tlist(RelOptInfo *rel) int i; /* - * We can do this for real relation scans, subquery scans, and function - * scans (but not for, eg, joins). + * We can do this for real relation scans, subquery scans, function + * scans, and values scans (but not for, eg, joins). */ if (rel->rtekind != RTE_RELATION && rel->rtekind != RTE_SUBQUERY && - rel->rtekind != RTE_FUNCTION) + rel->rtekind != RTE_FUNCTION && + rel->rtekind != RTE_VALUES) return false; /* @@ -365,6 +378,7 @@ disuse_physical_tlist(Plan *plan, Path *path) case T_TidScan: case T_SubqueryScan: case T_FunctionScan: + case T_ValuesScan: plan->targetlist = build_relation_tlist(path->parent); break; default: @@ -1312,6 +1326,35 @@ create_functionscan_plan(PlannerInfo *root, Path *best_path, return scan_plan; } +/* + * create_valuesscan_plan + * Returns a valuesscan plan for the base relation scanned by 'best_path' + * with restriction clauses 'scan_clauses' and targetlist 'tlist'. + */ +static ValuesScan * +create_valuesscan_plan(PlannerInfo *root, Path *best_path, + List *tlist, List *scan_clauses) +{ + ValuesScan *scan_plan; + Index scan_relid = best_path->parent->relid; + + /* it should be a values base rel... */ + Assert(scan_relid > 0); + Assert(best_path->parent->rtekind == RTE_VALUES); + + /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */ + scan_clauses = extract_actual_clauses(scan_clauses, false); + + /* Sort clauses into best execution order */ + scan_clauses = order_qual_clauses(root, scan_clauses); + + scan_plan = make_valuesscan(tlist, scan_clauses, scan_relid); + + copy_path_costsize(&scan_plan->scan.plan, best_path); + + return scan_plan; +} + /***************************************************************************** * * JOIN METHODS @@ -2123,6 +2166,24 @@ make_functionscan(List *qptlist, return node; } +static ValuesScan * +make_valuesscan(List *qptlist, + List *qpqual, + Index scanrelid) +{ + ValuesScan *node = makeNode(ValuesScan); + Plan *plan = &node->scan.plan; + + /* cost should be inserted by caller */ + plan->targetlist = qptlist; + plan->qual = qpqual; + plan->lefttree = NULL; + plan->righttree = NULL; + node->scan.scanrelid = scanrelid; + + return node; +} + Append * make_append(List *appendplans, bool isTarget, List *tlist) { |