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Ignore copies of columns specified in ORDER/GROUP BY

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This commit is contained in:
Vadim B. Mikheev
1997-10-16 06:58:38 +00:00
parent a805635d21
commit 9b10d6ffda
1 changed files with 36 additions and 7 deletions
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43
src/backend/parser/analyze.c
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@ -7,7 +7,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.45 1997/10/12 07:09:20 vadim Exp $ * $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.46 1997/10/16 06:58:38 vadim Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -1816,8 +1816,22 @@ transformGroupClause(ParseState *pstate, List *grouplist, List *targetlist)
gl = glist = lcons(grpcl, NIL); gl = glist = lcons(grpcl, NIL);
else else
{ {
lnext(gl) = lcons(grpcl, NIL); List *i;
gl = lnext(gl);
foreach (i, glist)
{
GroupClause *gcl = (GroupClause *) lfirst (i);
if ( gcl->entry == grpcl->entry )
break;
}
if ( i == NIL ) /* not in grouplist already */
{
lnext(gl) = lcons(grpcl, NIL);
gl = lnext(gl);
}
else
pfree (grpcl); /* get rid of this */
} }
grouplist = lnext(grouplist); grouplist = lnext(grouplist);
} }
@ -1836,8 +1850,7 @@ transformSortClause(ParseState *pstate,
char *uniqueFlag) char *uniqueFlag)
{ {
List *sortlist = NIL; List *sortlist = NIL;
List *s = NIL, List *s = NIL;
*i;
while (orderlist != NIL) while (orderlist != NIL)
{ {
@ -1860,14 +1873,30 @@ transformSortClause(ParseState *pstate,
} }
else else
{ {
lnext(s) = lcons(sortcl, NIL); List *i;
s = lnext(s);
foreach (i, sortlist)
{
SortClause *scl = (SortClause *) lfirst (i);
if ( scl->resdom == sortcl->resdom )
break;
}
if ( i == NIL ) /* not in sortlist already */
{
lnext(s) = lcons(sortcl, NIL);
s = lnext(s);
}
else
pfree (sortcl); /* get rid of this */
} }
orderlist = lnext(orderlist); orderlist = lnext(orderlist);
} }
if (uniqueFlag) if (uniqueFlag)
{ {
List *i;
if (uniqueFlag[0] == '*') if (uniqueFlag[0] == '*')
{ {