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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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7
src/backend/executor/execAmi.c
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@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: execAmi.c,v 1.53 2000/10/05 19:11:26 tgl Exp $
* $Id: execAmi.c,v 1.54 2000/10/26 21:35:15 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -37,6 +37,7 @@
#include "executor/nodeHashjoin.h"
#include "executor/nodeIndexscan.h"
#include "executor/nodeTidscan.h"
#include "executor/nodeLimit.h"
#include "executor/nodeMaterial.h"
#include "executor/nodeMergejoin.h"
#include "executor/nodeNestloop.h"
@ -350,6 +351,10 @@ ExecReScan(Plan *node, ExprContext *exprCtxt, Plan *parent)
ExecReScanSetOp((SetOp *) node, exprCtxt, parent);
break;
case T_Limit:
ExecReScanLimit((Limit *) node, exprCtxt, parent);
break;
case T_Sort:
ExecReScanSort((Sort *) node, exprCtxt, parent);
break;