diff options
Diffstat (limited to 'src/include/nodes/execnodes.h')
| -rw-r--r-- | src/include/nodes/execnodes.h | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/src/include/nodes/execnodes.h b/src/include/nodes/execnodes.h index 5552210de81..b9c10e6b310 100644 --- a/src/include/nodes/execnodes.h +++ b/src/include/nodes/execnodes.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: execnodes.h,v 1.55 2001/01/24 19:43:25 momjian Exp $ + * $Id: execnodes.h,v 1.56 2001/01/29 00:39:20 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -164,11 +164,19 @@ typedef struct ProjectionInfo * (including the junk attributes). * cleanTargetList: the "clean" target list (junk attributes removed). * cleanLength: the length of 'cleanTargetList' - * cleanTupTyp: the tuple descriptor of the "clean" tuple (with + * cleanTupType: the tuple descriptor of the "clean" tuple (with * junk attributes removed). - * cleanMap: A map with the correspondance between the non junk + * cleanMap: A map with the correspondance between the non-junk * attributes of the "original" tuple and the * attributes of the "clean" tuple. + * junkContext: memory context holding the JunkFilter node and all + * its subsidiary data structures. + * + * NOTE: the original targetList and tupType are passed to ExecInitJunkFilter + * and do not belong to the JunkFilter. All the other subsidiary structures + * are created during ExecInitJunkFilter, and all of them can be freed by + * deleting the memory context junkContext. This would not be needed if we + * had a cleaner approach to managing query-lifetime data structures... * ---------------- */ typedef struct JunkFilter @@ -181,6 +189,7 @@ typedef struct JunkFilter int jf_cleanLength; TupleDesc jf_cleanTupType; AttrNumber *jf_cleanMap; + MemoryContext jf_junkContext; } JunkFilter; /* ---------------- |