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

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

View File

@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: parse_coerce.h,v 1.42 2002/04/11 20:00:15 tgl Exp $
* $Id: parse_coerce.h,v 1.43 2002/05/12 23:43:04 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -45,7 +45,7 @@ extern Node *coerce_type(ParseState *pstate, Node *node, Oid inputTypeId,
extern Node *coerce_type_typmod(ParseState *pstate, Node *node,
Oid targetTypeId, int32 atttypmod);
extern bool coerce_to_boolean(ParseState *pstate, Node **pnode);
extern Node *coerce_to_boolean(Node *node, const char *constructName);
extern Oid select_common_type(List *typeids, const char *context);
extern Node *coerce_to_common_type(ParseState *pstate, Node *node,