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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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15
src/backend/optimizer/path/indxpath.c
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@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.116 2002/04/16 23:08:10 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.117 2002/05/12 23:43:02 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1316,7 +1316,8 @@ pred_test_simple_clause(Expr *predicate, Node *clause)
*/
test_oper = makeOper(test_op, /* opno */
InvalidOid, /* opid */
BOOLOID); /* opresulttype */
BOOLOID, /* opresulttype */
false); /* opretset */
replace_opid(test_oper);
test_expr = make_opclause(test_oper,
(Var *) clause_const,
@ -2020,7 +2021,7 @@ prefix_quals(Var *leftop, Oid expr_op,
if (oproid == InvalidOid)
elog(ERROR, "prefix_quals: no = operator for type %u", datatype);
con = string_to_const(prefix, datatype);
op = makeOper(oproid, InvalidOid, BOOLOID);
op = makeOper(oproid, InvalidOid, BOOLOID, false);
expr = make_opclause(op, leftop, (Var *) con);
result = makeList1(expr);
return result;
@ -2035,7 +2036,7 @@ prefix_quals(Var *leftop, Oid expr_op,
if (oproid == InvalidOid)
elog(ERROR, "prefix_quals: no >= operator for type %u", datatype);
con = string_to_const(prefix, datatype);
op = makeOper(oproid, InvalidOid, BOOLOID);
op = makeOper(oproid, InvalidOid, BOOLOID, false);
expr = make_opclause(op, leftop, (Var *) con);
result = makeList1(expr);
@ -2051,7 +2052,7 @@ prefix_quals(Var *leftop, Oid expr_op,
if (oproid == InvalidOid)
elog(ERROR, "prefix_quals: no < operator for type %u", datatype);
con = string_to_const(greaterstr, datatype);
op = makeOper(oproid, InvalidOid, BOOLOID);
op = makeOper(oproid, InvalidOid, BOOLOID, false);
expr = make_opclause(op, leftop, (Var *) con);
result = lappend(result, expr);
pfree(greaterstr);
@ -2116,7 +2117,7 @@ network_prefix_quals(Var *leftop, Oid expr_op, Datum rightop)
opr1right = network_scan_first(rightop);
op = makeOper(opr1oid, InvalidOid, BOOLOID);
op = makeOper(opr1oid, InvalidOid, BOOLOID, false);
expr = make_opclause(op, leftop,
(Var *) makeConst(datatype, -1, opr1right,
false, false, false, false));
@ -2131,7 +2132,7 @@ network_prefix_quals(Var *leftop, Oid expr_op, Datum rightop)
opr2right = network_scan_last(rightop);
op = makeOper(opr2oid, InvalidOid, BOOLOID);
op = makeOper(opr2oid, InvalidOid, BOOLOID, false);
expr = make_opclause(op, leftop,
(Var *) makeConst(datatype, -1, opr2right,
false, false, false, false));