diff options
Diffstat (limited to 'src/include/nodes/parsenodes.h')
| -rw-r--r-- | src/include/nodes/parsenodes.h | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/src/include/nodes/parsenodes.h b/src/include/nodes/parsenodes.h index 60703a06dcc..5bd0e89b185 100644 --- a/src/include/nodes/parsenodes.h +++ b/src/include/nodes/parsenodes.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: parsenodes.h,v 1.174 2002/04/24 02:48:55 momjian Exp $ + * $Id: parsenodes.h,v 1.175 2002/04/28 19:54:28 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -510,17 +510,14 @@ typedef struct RangeTblEntry /* * Fields valid for a join RTE (else NULL/zero): * - * joincoltypes/joincoltypmods identify the column datatypes of the - * join result. joinleftcols and joinrightcols identify the source - * columns from the join's inputs: each entry is either a source column - * AttrNumber or zero. For normal columns exactly one is nonzero, - * but both are nonzero for a column "merged" by USING or NATURAL. + * joinaliasvars is a list of Vars or COALESCE expressions corresponding + * to the columns of the join result. An alias Var referencing column + * K of the join result can be replaced by the K'th element of + * joinaliasvars --- but to simplify the task of reverse-listing aliases + * correctly, we do not do that until planning time. */ JoinType jointype; /* type of join */ - List *joincoltypes; /* integer list of column type OIDs */ - List *joincoltypmods; /* integer list of column typmods */ - List *joinleftcols; /* integer list of left-side column #s */ - List *joinrightcols; /* integer list of right-side column #s */ + List *joinaliasvars; /* list of alias-var expansions */ /* * Fields valid in all RTEs: |