diff options
Diffstat (limited to 'src/backend/optimizer/util/tlist.c')
| -rw-r--r-- | src/backend/optimizer/util/tlist.c | 31 |
1 files changed, 24 insertions, 7 deletions
diff --git a/src/backend/optimizer/util/tlist.c b/src/backend/optimizer/util/tlist.c index 8edf44190a4..b4c745b25f3 100644 --- a/src/backend/optimizer/util/tlist.c +++ b/src/backend/optimizer/util/tlist.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/optimizer/util/tlist.c,v 1.42 2000/01/26 05:56:40 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/optimizer/util/tlist.c,v 1.43 2000/01/27 18:11:34 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -217,15 +217,16 @@ get_expr(TargetEntry *tle) } /* - * get_sortgroupclause_expr + * get_sortgroupclause_tle * Find the targetlist entry matching the given SortClause - * (or GroupClause) by ressortgroupref, and return its expression. + * (or GroupClause) by ressortgroupref, and return it. * * Because GroupClause is typedef'd as SortClause, either kind of * node can be passed without casting. */ -Node * -get_sortgroupclause_expr(SortClause *sortClause, List *targetList) +TargetEntry * +get_sortgroupclause_tle(SortClause *sortClause, + List *targetList) { Index refnumber = sortClause->tleSortGroupRef; List *l; @@ -235,9 +236,25 @@ get_sortgroupclause_expr(SortClause *sortClause, List *targetList) TargetEntry *tle = (TargetEntry *) lfirst(l); if (tle->resdom->ressortgroupref == refnumber) - return tle->expr; + return tle; } - elog(ERROR, "get_sortgroupclause_expr: ORDER/GROUP BY expression not found in targetlist"); + elog(ERROR, "get_sortgroupclause_tle: ORDER/GROUP BY expression not found in targetlist"); return NULL; /* keep compiler quiet */ } + +/* + * get_sortgroupclause_expr + * Find the targetlist entry matching the given SortClause + * (or GroupClause) by ressortgroupref, and return its expression. + * + * Because GroupClause is typedef'd as SortClause, either kind of + * node can be passed without casting. + */ +Node * +get_sortgroupclause_expr(SortClause *sortClause, List *targetList) +{ + TargetEntry *tle = get_sortgroupclause_tle(sortClause, targetList); + + return tle->expr; +} |