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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2003-01-20 18:55:07 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2003-01-20 18:55:07 +0000 |
| commit | bdfbfde1b168b3332c4cdac34ac86a80aaf4d442 (patch) | |
| tree | f35bf1af04733069f3a6b0a2698ac10dbd6544ed /src/include/optimizer/pathnode.h | |
| parent | be2b660ecd5ca205570825633e7b8479379ddc64 (diff) | |
| download | postgresql-bdfbfde1b168b3332c4cdac34ac86a80aaf4d442.tar.gz | |
IN clauses appearing at top level of WHERE can now be handled as joins.
There are two implementation techniques: the executor understands a new
JOIN_IN jointype, which emits at most one matching row per left-hand row,
or the result of the IN's sub-select can be fed through a DISTINCT filter
and then joined as an ordinary relation.
Along the way, some minor code cleanup in the optimizer; notably, break
out most of the jointree-rearrangement preprocessing in planner.c and
put it in a new file prep/prepjointree.c.
Diffstat (limited to 'src/include/optimizer/pathnode.h')
| -rw-r--r-- | src/include/optimizer/pathnode.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/include/optimizer/pathnode.h b/src/include/optimizer/pathnode.h index 77ed27e7e5..759b18c249 100644 --- a/src/include/optimizer/pathnode.h +++ b/src/include/optimizer/pathnode.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: pathnode.h,v 1.47 2003/01/15 19:35:47 tgl Exp $ + * $Id: pathnode.h,v 1.48 2003/01/20 18:55:05 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -38,6 +38,8 @@ extern AppendPath *create_append_path(RelOptInfo *rel, List *subpaths); extern ResultPath *create_result_path(RelOptInfo *rel, Path *subpath, List *constantqual); extern MaterialPath *create_material_path(RelOptInfo *rel, Path *subpath); +extern UniquePath *create_unique_path(Query *root, RelOptInfo *rel, + Path *subpath); extern Path *create_subqueryscan_path(RelOptInfo *rel); extern Path *create_functionscan_path(Query *root, RelOptInfo *rel); @@ -75,6 +77,7 @@ extern void build_base_rel(Query *root, int relid); extern RelOptInfo *build_other_rel(Query *root, int relid); extern RelOptInfo *find_base_rel(Query *root, int relid); extern RelOptInfo *build_join_rel(Query *root, + List *joinrelids, RelOptInfo *outer_rel, RelOptInfo *inner_rel, JoinType jointype, |