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Modify raw parsetree representation returned by gram.y for SubLinks:

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the oper field should be a valid Node structure so it can be dumped by
outfuncs.c without risk of coredump.  (We had been using a raw pointer
to character string, which surely is NOT a valid Node.)  This doesn't
cause any backwards compatibility problems for stored rules, since
raw unanalyzed parsetrees are never stored.
This commit is contained in:
Tom Lane
2000-05-25 22:42:19 +00:00
parent 610abfd57b
commit ff566b2241
3 changed files with 19 additions and 17 deletions
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10
src/backend/parser/parse_expr.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_expr.c,v 1.76 2000/04/12 17:15:26 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_expr.c,v 1.77 2000/05/25 22:42:18 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -324,23 +324,25 @@ transformExpr(ParseState *pstate, Node *expr, int precedence)
else
{
/* ALL, ANY, or MULTIEXPR: generate operator list */
char *op = lfirst(sublink->oper);
List *left_list = sublink->lefthand;
List *right_list = qtree->targetList;
char *op;
List *elist;
foreach(elist, left_list)
lfirst(elist) = transformExpr(pstate, lfirst(elist),
precedence);
Assert(IsA(sublink->oper, A_Expr));
op = ((A_Expr *) sublink->oper)->opname;
sublink->oper = NIL;
/* Combining operators other than =/<> is dubious... */
if (length(left_list) != 1 &&
strcmp(op, "=") != 0 && strcmp(op, "<>") != 0)
elog(ERROR, "Row comparison cannot use '%s'",
op);
sublink->oper = NIL;
/*
* Scan subquery's targetlist to find values that will
* be matched against lefthand values. We need to