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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2008-10-04 21:56:55 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2008-10-04 21:56:55 +0000 |
| commit | 44d5be0e5308e951c0c5dc522b4bcacf2bcbc476 (patch) | |
| tree | 516f1c70436225751f631e7e686f7ea61b3db9df /src/include/optimizer/cost.h | |
| parent | 607b2be7bb230ea4c558cb3101794f94de35ab85 (diff) | |
| download | postgresql-44d5be0e5308e951c0c5dc522b4bcacf2bcbc476.tar.gz postgresql-44d5be0e5308e951c0c5dc522b4bcacf2bcbc476.zip | |
Implement SQL-standard WITH clauses, including WITH RECURSIVE.
There are some unimplemented aspects: recursive queries must use UNION ALL
(should allow UNION too), and we don't have SEARCH or CYCLE clauses.
These might or might not get done for 8.4, but even without them it's a
pretty useful feature.
There are also a couple of small loose ends and definitional quibbles,
which I'll send a memo about to pgsql-hackers shortly. But let's land
the patch now so we can get on with other development.
Yoshiyuki Asaba, with lots of help from Tatsuo Ishii and Tom Lane
Diffstat (limited to 'src/include/optimizer/cost.h')
| -rw-r--r-- | src/include/optimizer/cost.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/include/optimizer/cost.h b/src/include/optimizer/cost.h index 8ad8f7f0626..181327caa81 100644 --- a/src/include/optimizer/cost.h +++ b/src/include/optimizer/cost.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/optimizer/cost.h,v 1.92 2008/08/22 00:16:04 tgl Exp $ + * $PostgreSQL: pgsql/src/include/optimizer/cost.h,v 1.93 2008/10/04 21:56:55 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -72,6 +72,8 @@ extern void cost_functionscan(Path *path, PlannerInfo *root, RelOptInfo *baserel); extern void cost_valuesscan(Path *path, PlannerInfo *root, RelOptInfo *baserel); +extern void cost_ctescan(Path *path, PlannerInfo *root, RelOptInfo *baserel); +extern void cost_recursive_union(Plan *runion, Plan *nrterm, Plan *rterm); extern void cost_sort(Path *path, PlannerInfo *root, List *pathkeys, Cost input_cost, double tuples, int width, double limit_tuples); @@ -104,6 +106,8 @@ extern void set_joinrel_size_estimates(PlannerInfo *root, RelOptInfo *rel, List *restrictlist); extern void set_function_size_estimates(PlannerInfo *root, RelOptInfo *rel); extern void set_values_size_estimates(PlannerInfo *root, RelOptInfo *rel); +extern void set_cte_size_estimates(PlannerInfo *root, RelOptInfo *rel, + Plan *cteplan); /* * prototypes for clausesel.c |