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This commit is contained in:
Tom Lane 2002-11-27 20:52:04 +00:00
parent fd89de5156
commit 73235a19cf
1 changed files with 8 additions and 4 deletions
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12
src/include/nodes/relation.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California * Portions Copyright (c) 1994, Regents of the University of California
* *
* $Id: relation.h,v 1.69 2002/11/24 21:52:15 tgl Exp $ * $Id: relation.h,v 1.70 2002/11/27 20:52:04 tgl Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -171,7 +171,7 @@ typedef struct RelOptInfo
RelOptKind reloptkind; RelOptKind reloptkind;
/* all relations included in this RelOptInfo */ /* all relations included in this RelOptInfo */
Relids relids; /* integer list of base relids (RT Relids relids; /* integer list of base relids (rangetable
* indexes) */ * indexes) */
/* size estimates generated by planner */ /* size estimates generated by planner */
@ -304,6 +304,11 @@ typedef struct PathKeyItem
/* /*
* Type "Path" is used as-is for sequential-scan paths. For other * Type "Path" is used as-is for sequential-scan paths. For other
* path types it is the first component of a larger struct. * path types it is the first component of a larger struct.
*
* Note: "pathtype" is the NodeTag of the Plan node we could build from this
* Path. It is partially redundant with the Path's NodeTag, but allows us
* to use the same Path type for multiple Plan types where there is no need
* to distinguish the Plan type during path processing.
*/ */
typedef struct Path typedef struct Path
@ -319,7 +324,6 @@ typedef struct Path
* fetched) */ * fetched) */
NodeTag pathtype; /* tag identifying scan/join method */ NodeTag pathtype; /* tag identifying scan/join method */
/* XXX why is pathtype separate from the NodeTag? */
List *pathkeys; /* sort ordering of path's output */ List *pathkeys; /* sort ordering of path's output */
/* pathkeys is a List of Lists of PathKeyItem nodes; see above */ /* pathkeys is a List of Lists of PathKeyItem nodes; see above */
@ -373,7 +377,7 @@ typedef struct IndexPath
typedef struct TidPath typedef struct TidPath
{ {
Path path; Path path;
List *tideval; List *tideval; /* qual(s) involving CTID = something */
Relids unjoined_relids; /* some rels not yet part of my Path */ Relids unjoined_relids; /* some rels not yet part of my Path */
} TidPath; } TidPath;