diff options
Diffstat (limited to 'src/include/nodes/nodes.h')
| -rw-r--r-- | src/include/nodes/nodes.h | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/src/include/nodes/nodes.h b/src/include/nodes/nodes.h index f119b5111d..bf8bb1719e 100644 --- a/src/include/nodes/nodes.h +++ b/src/include/nodes/nodes.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: nodes.h,v 1.134 2002/12/16 16:22:46 tgl Exp $ + * $Id: nodes.h,v 1.135 2003/01/20 18:55:00 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -152,10 +152,12 @@ typedef enum NodeTag T_AppendPath, T_ResultPath, T_MaterialPath, + T_UniquePath, T_PathKeyItem, T_RestrictInfo, T_JoinInfo, T_InnerIndexscanInfo, + T_InClauseInfo, /* * TAGS FOR MEMORY NODES (memnodes.h) @@ -408,11 +410,20 @@ typedef enum JoinType * join in the executor. (The planner must convert it to an Append * plan.) */ - JOIN_UNION + JOIN_UNION, /* - * Eventually we will have some additional join types for efficient - * support of queries like WHERE foo IN (SELECT bar FROM ...). + * These are used for queries like WHERE foo IN (SELECT bar FROM ...). + * Only JOIN_IN is actually implemented in the executor; the others + * are defined for internal use in the planner. + */ + JOIN_IN, /* at most one result per outer row */ + JOIN_REVERSE_IN, /* at most one result per inner row */ + JOIN_UNIQUE_OUTER, /* outer path must be made unique */ + JOIN_UNIQUE_INNER /* inner path must be made unique */ + + /* + * We might need additional join types someday. */ } JoinType; |