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Get rid of long-since-vestigial Iter node type, in favor of adding a

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returns-set boolean field in Func and Oper nodes.  This allows cleaner,
more reliable tests for expressions returning sets in the planner and
parser.  For example, a WHERE clause returning a set is now detected
and complained of in the parser, not only at runtime.
This commit is contained in:
Tom Lane
2002-05-12 23:43:04 +00:00
parent f9e4f611a1
commit 3389a110d4
33 changed files with 297 additions and 676 deletions
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6
src/backend/nodes/makefuncs.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/nodes/makefuncs.c,v 1.31 2002/04/16 23:08:10 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/nodes/makefuncs.c,v 1.32 2002/05/12 23:43:02 tgl Exp $
*/
#include "postgres.h"
@ -56,13 +56,15 @@ makeSimpleA_Expr(int oper, const char *name,
Oper *
makeOper(Oid opno,
Oid opid,
Oid opresulttype)
Oid opresulttype,
bool opretset)
{
Oper *oper = makeNode(Oper);
oper->opno = opno;
oper->opid = opid;
oper->opresulttype = opresulttype;
oper->opretset = opretset;
oper->op_fcache = NULL;
return oper;
}