diff options
Diffstat (limited to 'src/backend/optimizer/util/pathnode.c')
| -rw-r--r-- | src/backend/optimizer/util/pathnode.c | 38 |
1 files changed, 36 insertions, 2 deletions
diff --git a/src/backend/optimizer/util/pathnode.c b/src/backend/optimizer/util/pathnode.c index 4b3c9809b8b..7dd0dce6891 100644 --- a/src/backend/optimizer/util/pathnode.c +++ b/src/backend/optimizer/util/pathnode.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/optimizer/util/pathnode.c,v 1.78 2002/06/20 20:29:31 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/optimizer/util/pathnode.c,v 1.79 2002/11/06 00:00:44 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -405,7 +405,6 @@ create_tidscan_path(Query *root, RelOptInfo *rel, List *tideval) * create_append_path * Creates a path corresponding to an Append plan, returning the * pathnode. - * */ AppendPath * create_append_path(RelOptInfo *rel, List *subpaths) @@ -434,6 +433,41 @@ create_append_path(RelOptInfo *rel, List *subpaths) } /* + * create_result_path + * Creates a path corresponding to a Result plan, returning the + * pathnode. + */ +ResultPath * +create_result_path(RelOptInfo *rel, Path *subpath, List *constantqual) +{ + ResultPath *pathnode = makeNode(ResultPath); + + pathnode->path.pathtype = T_Result; + pathnode->path.parent = rel; /* may be NULL */ + + if (subpath) + pathnode->path.pathkeys = subpath->pathkeys; + else + pathnode->path.pathkeys = NIL; + + pathnode->subpath = subpath; + pathnode->constantqual = constantqual; + + if (subpath) + { + pathnode->path.startup_cost = subpath->startup_cost; + pathnode->path.total_cost = subpath->total_cost; + } + else + { + pathnode->path.startup_cost = 0; + pathnode->path.total_cost = cpu_tuple_cost; + } + + return pathnode; +} + +/* * create_subqueryscan_path * Creates a path corresponding to a sequential scan of a subquery, * returning the pathnode. |