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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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3
src/include/nodes/nodes.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: nodes.h,v 1.106 2002/05/12 20:10:04 tgl Exp $
* $Id: nodes.h,v 1.107 2002/05/12 23:43:04 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -66,7 +66,6 @@ typedef enum NodeTag
T_Func,
T_FieldSelect,
T_ArrayRef,
T_Iter,
T_RelabelType,
T_RangeTblRef,
T_FromExpr,