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Re-implement LIMIT/OFFSET as a plan node type, instead of a hack in

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ExecutorRun.  This allows LIMIT to work in a view.  Also, LIMIT in a
cursor declaration will behave in a reasonable fashion, whereas before
it was overridden by the FETCH count.
This commit is contained in:
Tom Lane
2000-10-26 21:38:24 +00:00
parent c9476bafdb
commit 2f35b4efdb
26 changed files with 572 additions and 232 deletions
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4
src/include/optimizer/planmain.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: planmain.h,v 1.46 2000/10/05 19:11:37 tgl Exp $
* $Id: planmain.h,v 1.47 2000/10/26 21:38:24 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -36,6 +36,8 @@ extern Group *make_group(List *tlist, bool tuplePerGroup, int ngrp,
AttrNumber *grpColIdx, Plan *lefttree);
extern Material *make_material(List *tlist, Plan *lefttree);
extern Unique *make_unique(List *tlist, Plan *lefttree, List *distinctList);
extern Limit *make_limit(List *tlist, Plan *lefttree,
Node *limitOffset, Node *limitCount);
extern SetOp *make_setop(SetOpCmd cmd, List *tlist, Plan *lefttree,
List *distinctList, AttrNumber flagColIdx);
extern Result *make_result(List *tlist, Node *resconstantqual, Plan *subplan);