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authorTom Lane <tgl@sss.pgh.pa.us>2001-02-16 00:03:08 +0000
committerTom Lane <tgl@sss.pgh.pa.us>2001-02-16 00:03:08 +0000
commitb29f68f611e26377306a9ba2210a589b472c8544 (patch)
tree00a057a7682b2a727a9445b753af10dde172a3d4 /src/include/optimizer/pathnode.h
parentca71c6619086ac3b6e3787c2826363faeab02ac9 (diff)
downloadpostgresql-b29f68f611e26377306a9ba2210a589b472c8544.tar.gz
postgresql-b29f68f611e26377306a9ba2210a589b472c8544.zip
Take OUTER JOIN semantics into account when estimating the size of join
relations. It's not very bright, but at least it now knows that A LEFT JOIN B must produce at least as many rows as are in A ...
Diffstat (limited to 'src/include/optimizer/pathnode.h')
-rw-r--r--src/include/optimizer/pathnode.h10
1 files changed, 6 insertions, 4 deletions
diff --git a/src/include/optimizer/pathnode.h b/src/include/optimizer/pathnode.h
index b4e239aa8f7..7e000034761 100644
--- a/src/include/optimizer/pathnode.h
+++ b/src/include/optimizer/pathnode.h
@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $Id: pathnode.h,v 1.33 2001/01/24 19:43:26 momjian Exp $
+ * $Id: pathnode.h,v 1.34 2001/02/16 00:03:06 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -66,8 +66,10 @@ extern HashPath *create_hashjoin_path(RelOptInfo *joinrel,
*/
extern RelOptInfo *get_base_rel(Query *root, int relid);
extern RelOptInfo *make_base_rel(Query *root, int relid);
-extern RelOptInfo *get_join_rel(Query *root, RelOptInfo *outer_rel,
- RelOptInfo *inner_rel,
- List **restrictlist_ptr);
+extern RelOptInfo *get_join_rel(Query *root,
+ RelOptInfo *outer_rel,
+ RelOptInfo *inner_rel,
+ JoinType jointype,
+ List **restrictlist_ptr);
#endif /* PATHNODE_H */