diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/include/nodes/relation.h | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/src/include/nodes/relation.h b/src/include/nodes/relation.h index d441e6bdc49..a3f0e36c766 100644 --- a/src/include/nodes/relation.h +++ b/src/include/nodes/relation.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: 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; /* all relations included in this RelOptInfo */ - Relids relids; /* integer list of base relids (RT + Relids relids; /* integer list of base relids (rangetable * indexes) */ /* size estimates generated by planner */ @@ -304,6 +304,11 @@ typedef struct PathKeyItem /* * Type "Path" is used as-is for sequential-scan paths. For other * 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 @@ -319,7 +324,6 @@ typedef struct Path * fetched) */ NodeTag pathtype; /* tag identifying scan/join method */ - /* XXX why is pathtype separate from the NodeTag? */ List *pathkeys; /* sort ordering of path's output */ /* pathkeys is a List of Lists of PathKeyItem nodes; see above */ @@ -373,7 +377,7 @@ typedef struct IndexPath typedef struct TidPath { Path path; - List *tideval; + List *tideval; /* qual(s) involving CTID = something */ Relids unjoined_relids; /* some rels not yet part of my Path */ } TidPath; |