diff options
Diffstat (limited to 'src/backend/optimizer/util/pathnode.c')
| -rw-r--r-- | src/backend/optimizer/util/pathnode.c | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/src/backend/optimizer/util/pathnode.c b/src/backend/optimizer/util/pathnode.c index 8e32895fb27..a922abcee8a 100644 --- a/src/backend/optimizer/util/pathnode.c +++ b/src/backend/optimizer/util/pathnode.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/optimizer/util/pathnode.c,v 1.147 2008/09/05 21:07:29 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/optimizer/util/pathnode.c,v 1.148 2008/10/04 21:56:53 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -1220,6 +1220,45 @@ create_valuesscan_path(PlannerInfo *root, RelOptInfo *rel) } /* + * create_ctescan_path + * Creates a path corresponding to a scan of a non-self-reference CTE, + * returning the pathnode. + */ +Path * +create_ctescan_path(PlannerInfo *root, RelOptInfo *rel) +{ + Path *pathnode = makeNode(Path); + + pathnode->pathtype = T_CteScan; + pathnode->parent = rel; + pathnode->pathkeys = NIL; /* XXX for now, result is always unordered */ + + cost_ctescan(pathnode, root, rel); + + return pathnode; +} + +/* + * create_worktablescan_path + * Creates a path corresponding to a scan of a self-reference CTE, + * returning the pathnode. + */ +Path * +create_worktablescan_path(PlannerInfo *root, RelOptInfo *rel) +{ + Path *pathnode = makeNode(Path); + + pathnode->pathtype = T_WorkTableScan; + pathnode->parent = rel; + pathnode->pathkeys = NIL; /* result is always unordered */ + + /* Cost is the same as for a regular CTE scan */ + cost_ctescan(pathnode, root, rel); + + return pathnode; +} + +/* * create_nestloop_path * Creates a pathnode corresponding to a nestloop join between two * relations. |