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[ Revert patch ]

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> =================================================================
> User interface proposal for multi-row function targetlist entries
> =================================================================
> 1. Only one targetlist entry may return a set.
> 2. Each targetlist item (other than the set returning one) is
>    repeated for each item in the returned set.
>

Having gotten no objections (actually, no response at all), I can only
assume no one had heartburn with this change. The attached patch covers
the first of the two proposals, i.e. restricting the target list to only
one set returning function.

Joe Conway
This commit is contained in:
Bruce Momjian
2003-02-13 05:53:46 +00:00
parent 29e57ce303
commit e529e9fa44
3 changed files with 8 additions and 24 deletions
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24
src/backend/parser/parse_target.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_target.c,v 1.96 2003/02/13 05:06:35 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_target.c,v 1.97 2003/02/13 05:53:46 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -42,16 +42,13 @@ static int FigureColnameInternal(Node *node, char **name);
* colname the column name to be assigned, or NULL if none yet set.
* resjunk true if the target should be marked resjunk, ie, it is not
* wanted in the final projected tuple.
* retset if non-NULL, and the entry is a function expression, pass back
* expr->funcretset
*/
TargetEntry *
transformTargetEntry(ParseState *pstate,
Node *node,
Node *expr,
char *colname,
bool resjunk,
bool *retset)
bool resjunk)
{
Oid type_id;
int32 type_mod;
@ -64,9 +61,6 @@ transformTargetEntry(ParseState *pstate,
if (IsA(expr, RangeVar))
elog(ERROR, "You can't use relation names alone in the target list, try relation.*.");
if (retset && IsA(expr, FuncExpr))
*retset = ((FuncExpr *) expr)->funcretset;
type_id = exprType(expr);
type_mod = exprTypmod(expr);
@ -99,12 +93,10 @@ transformTargetEntry(ParseState *pstate,
List *
transformTargetList(ParseState *pstate, List *targetlist)
{
bool retset = false;
List *p_target = NIL;
while (targetlist != NIL)
{
bool entry_retset = false;
ResTarget *res = (ResTarget *) lfirst(targetlist);
if (IsA(res->val, ColumnRef))
@ -181,8 +173,7 @@ transformTargetList(ParseState *pstate, List *targetlist)
res->val,
NULL,
res->name,
false,
&entry_retset));
false));
}
}
else if (IsA(res->val, InsertDefault))
@ -203,16 +194,9 @@ transformTargetList(ParseState *pstate, List *targetlist)
res->val,
NULL,
res->name,
false,
&entry_retset));
false));
}
if (retset && entry_retset)
elog(ERROR, "Only one target list entry may return a set result");
if (entry_retset)
retset = true;
targetlist = lnext(targetlist);
}