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/*-------------------------------------------------------------------------
*
* execAmi.c
* miscellaneous executor access method routines
*
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: execAmi.c,v 1.64 2002/06/20 20:29:27 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/genam.h"
#include "access/heapam.h"
#include "catalog/heap.h"
#include "executor/execdebug.h"
#include "executor/instrument.h"
#include "executor/nodeAgg.h"
#include "executor/nodeAppend.h"
#include "executor/nodeGroup.h"
#include "executor/nodeGroup.h"
#include "executor/nodeHash.h"
#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"
#include "executor/nodeResult.h"
#include "executor/nodeSeqscan.h"
#include "executor/nodeSetOp.h"
#include "executor/nodeSort.h"
#include "executor/nodeSubplan.h"
#include "executor/nodeSubqueryscan.h"
#include "executor/nodeFunctionscan.h"
#include "executor/nodeUnique.h"
/* ----------------------------------------------------------------
* ExecReScan
*
* XXX this should be extended to cope with all the node types..
*
* takes the new expression context as an argument, so that
* index scans needn't have their scan keys updated separately
* - marcel 09/20/94
* ----------------------------------------------------------------
*/
void
ExecReScan(Plan *node, ExprContext *exprCtxt, Plan *parent)
{
if (node->instrument)
InstrEndLoop(node->instrument);
if (node->chgParam != NULL) /* Wow! */
{
List *lst;
foreach(lst, node->initPlan)
{
Plan *splan = ((SubPlan *) lfirst(lst))->plan;
if (splan->extParam != NULL) /* don't care about child
* locParam */
SetChangedParamList(splan, node->chgParam);
if (splan->chgParam != NULL)
ExecReScanSetParamPlan((SubPlan *) lfirst(lst), node);
}
foreach(lst, node->subPlan)
{
Plan *splan = ((SubPlan *) lfirst(lst))->plan;
if (splan->extParam != NULL)
SetChangedParamList(splan, node->chgParam);
}
/* Well. Now set chgParam for left/right trees. */
if (node->lefttree != NULL)
SetChangedParamList(node->lefttree, node->chgParam);
if (node->righttree != NULL)
SetChangedParamList(node->righttree, node->chgParam);
}
switch (nodeTag(node))
{
case T_SeqScan:
ExecSeqReScan((SeqScan *) node, exprCtxt, parent);
break;
case T_IndexScan:
ExecIndexReScan((IndexScan *) node, exprCtxt, parent);
break;
case T_TidScan:
ExecTidReScan((TidScan *) node, exprCtxt, parent);
break;
case T_SubqueryScan:
ExecSubqueryReScan((SubqueryScan *) node, exprCtxt, parent);
break;
case T_FunctionScan:
ExecFunctionReScan((FunctionScan *) node, exprCtxt, parent);
break;
case T_Material:
ExecMaterialReScan((Material *) node, exprCtxt, parent);
break;
case T_NestLoop:
ExecReScanNestLoop((NestLoop *) node, exprCtxt, parent);
break;
case T_HashJoin:
ExecReScanHashJoin((HashJoin *) node, exprCtxt, parent);
break;
case T_Hash:
ExecReScanHash((Hash *) node, exprCtxt, parent);
break;
case T_Agg:
ExecReScanAgg((Agg *) node, exprCtxt, parent);
break;
case T_Group:
ExecReScanGroup((Group *) node, exprCtxt, parent);
break;
case T_Result:
ExecReScanResult((Result *) node, exprCtxt, parent);
break;
case T_Unique:
ExecReScanUnique((Unique *) node, exprCtxt, parent);
break;
case T_SetOp:
ExecReScanSetOp((SetOp *) node, exprCtxt, parent);
break;
case T_Limit:
ExecReScanLimit((Limit *) node, exprCtxt, parent);
break;
case T_Sort:
ExecReScanSort((Sort *) node, exprCtxt, parent);
break;
case T_MergeJoin:
ExecReScanMergeJoin((MergeJoin *) node, exprCtxt, parent);
break;
case T_Append:
ExecReScanAppend((Append *) node, exprCtxt, parent);
break;
default:
elog(ERROR, "ExecReScan: node type %d not supported",
nodeTag(node));
return;
}
if (node->chgParam != NULL)
{
freeList(node->chgParam);
node->chgParam = NULL;
}
}
/* ----------------------------------------------------------------
* ExecMarkPos
*
* Marks the current scan position.
*
* XXX Needs to be extended to include all the node types,
* or at least all the ones that can be directly below a mergejoin.
* ----------------------------------------------------------------
*/
void
ExecMarkPos(Plan *node)
{
switch (nodeTag(node))
{
case T_SeqScan:
ExecSeqMarkPos((SeqScan *) node);
break;
case T_IndexScan:
ExecIndexMarkPos((IndexScan *) node);
break;
case T_FunctionScan:
ExecFunctionMarkPos((FunctionScan *) node);
break;
case T_Material:
ExecMaterialMarkPos((Material *) node);
break;
case T_Sort:
ExecSortMarkPos((Sort *) node);
break;
case T_TidScan:
ExecTidMarkPos((TidScan *) node);
break;
default:
/* don't make hard error unless caller asks to restore... */
elog(LOG, "ExecMarkPos: node type %d not supported",
nodeTag(node));
break;
}
}
/* ----------------------------------------------------------------
* ExecRestrPos
*
* restores the scan position previously saved with ExecMarkPos()
*
* XXX Needs to be extended to include all the node types,
* or at least all the ones that can be directly below a mergejoin.
* ----------------------------------------------------------------
*/
void
ExecRestrPos(Plan *node)
{
switch (nodeTag(node))
{
case T_SeqScan:
ExecSeqRestrPos((SeqScan *) node);
break;
case T_IndexScan:
ExecIndexRestrPos((IndexScan *) node);
break;
case T_FunctionScan:
ExecFunctionRestrPos((FunctionScan *) node);
break;
case T_Material:
ExecMaterialRestrPos((Material *) node);
break;
case T_Sort:
ExecSortRestrPos((Sort *) node);
break;
default:
elog(ERROR, "ExecRestrPos: node type %d not supported",
nodeTag(node));
break;
}
}
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