diff options
Diffstat (limited to 'src/include/nodes/relation.h')
| -rw-r--r-- | src/include/nodes/relation.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/src/include/nodes/relation.h b/src/include/nodes/relation.h index 4432252a72f..9b59d63b2b3 100644 --- a/src/include/nodes/relation.h +++ b/src/include/nodes/relation.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/nodes/relation.h,v 1.174 2009/07/16 20:55:44 tgl Exp $ + * $PostgreSQL: pgsql/src/include/nodes/relation.h,v 1.175 2009/09/17 20:49:29 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -784,6 +784,22 @@ typedef struct UniquePath } UniquePath; /* + * NoOpPath represents exactly the same plan as its subpath. This is used + * when we have determined that a join can be eliminated. The difference + * between the NoOpPath and its subpath is just that the NoOpPath's parent + * is the whole join relation while the subpath is for one of the joined + * relations (and the other one isn't needed). + * + * Note: path.pathtype is always T_Join, but this won't actually give rise + * to a Join plan node. + */ +typedef struct NoOpPath +{ + Path path; + Path *subpath; +} NoOpPath; + +/* * All join-type paths share these fields. */ |