diff options
Diffstat (limited to 'src/backend/optimizer/util/pathnode.c')
| -rw-r--r-- | src/backend/optimizer/util/pathnode.c | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/src/backend/optimizer/util/pathnode.c b/src/backend/optimizer/util/pathnode.c index fc73bb2b664..737b4db2d3d 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 1.65 2000/09/12 21:06:58 tgl Exp $ + * $Header: /cvsroot/pgsql/src/backend/optimizer/util/pathnode.c,v 1.66 2000/09/29 18:21:23 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -16,6 +16,7 @@ #include "postgres.h" +#include "nodes/plannodes.h" #include "optimizer/cost.h" #include "optimizer/pathnode.h" #include "optimizer/paths.h" @@ -272,7 +273,6 @@ add_path(RelOptInfo *parent_rel, Path *new_path) * create_seqscan_path * Creates a path corresponding to a sequential scan, returning the * pathnode. - * */ Path * create_seqscan_path(RelOptInfo *rel) @@ -343,8 +343,8 @@ create_index_path(Query *root, * We are making a pathnode for a single-scan indexscan; therefore, * both indexid and indexqual should be single-element lists. */ - pathnode->indexid = lconsi(index->indexoid, NIL); - pathnode->indexqual = lcons(indexquals, NIL); + pathnode->indexid = makeListi1(index->indexoid); + pathnode->indexqual = makeList1(indexquals); pathnode->indexscandir = indexscandir; @@ -391,6 +391,27 @@ create_tidscan_path(RelOptInfo *rel, List *tideval) } /* + * create_subqueryscan_path + * Creates a path corresponding to a sequential scan of a subquery, + * returning the pathnode. + */ +Path * +create_subqueryscan_path(RelOptInfo *rel) +{ + Path *pathnode = makeNode(Path); + + pathnode->pathtype = T_SubqueryScan; + pathnode->parent = rel; + pathnode->pathkeys = NIL; /* for now, assume unordered result */ + + /* just copy the subplan's cost estimates */ + pathnode->startup_cost = rel->subplan->startup_cost; + pathnode->total_cost = rel->subplan->total_cost; + + return pathnode; +} + +/* * create_nestloop_path * Creates a pathnode corresponding to a nestloop join between two * relations. |