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Support for subselects.

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ExecReScan for nodeAgg, nodeHash, nodeHashjoin, nodeNestloop and nodeResult.
Fixed ExecReScan for nodeMaterial.
Get rid of #ifdef INDEXSCAN_PATCH.
Get rid of ExecMarkPos and ExecRestrPos in nodeNestloop.
This commit is contained in:
Vadim B. Mikheev
1998-02-13 03:26:53 +00:00
parent 13637df458
commit 1a105cefbd
15 changed files with 677 additions and 153 deletions
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71
src/backend/executor/nodeIndexscan.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/nodeIndexscan.c,v 1.13 1998/01/07 21:02:54 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/nodeIndexscan.c,v 1.14 1998/02/13 03:26:49 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@ -247,7 +247,6 @@ ExecIndexReScan(IndexScan *node, ExprContext *exprCtxt, Plan *parent)
indexstate = node->indxstate;
estate = node->scan.plan.state;
direction = estate->es_direction;
indexstate = node->indxstate;
numIndices = indexstate->iss_NumIndices;
scanDescs = indexstate->iss_ScanDescs;
scanKeys = indexstate->iss_ScanKeys;
@ -268,7 +267,11 @@ ExecIndexReScan(IndexScan *node, ExprContext *exprCtxt, Plan *parent)
n_keys = numScanKeys[indexPtr];
run_keys = (int *) runtimeKeyInfo[indexPtr];
scan_keys = (ScanKey) scanKeys[indexPtr];
/* it's possible in subselects */
if (exprCtxt == NULL)
exprCtxt = node->scan.scanstate->cstate.cs_ExprContext;
for (j = 0; j < n_keys; j++)
{
@ -485,6 +488,8 @@ ExecInitIndexScan(IndexScan *node, EState *estate, Plan *parent)
HeapScanDesc currentScanDesc;
ScanDirection direction;
int baseid;
List *execParam = NULL;
/* ----------------
* assign execution state to node
@ -696,7 +701,6 @@ ExecInitIndexScan(IndexScan *node, EState *estate, Plan *parent)
*/
run_keys[j] = NO_OP;
scanvalue = ((Const *) leftop)->constvalue;
#ifdef INDEXSCAN_PATCH
}
else if (IsA(leftop, Param))
{
@ -707,13 +711,24 @@ ExecInitIndexScan(IndexScan *node, EState *estate, Plan *parent)
* it identifies the value to place in our scan key.
* ----------------
*/
run_keys[j] = NO_OP;
scanvalue = ExecEvalParam((Param *) leftop,
scanstate->cstate.cs_ExprContext,
&isnull);
if (isnull)
flags |= SK_ISNULL;
#endif
/* Life was so easy before ... subselects */
if ( ((Param *) leftop)->paramkind == PARAM_EXEC )
{
have_runtime_keys = true;
run_keys[j] = LEFT_OP;
execParam = lappendi (execParam, ((Param*) leftop)->paramid);
}
else
{
scanvalue = ExecEvalParam((Param *) leftop,
scanstate->cstate.cs_ExprContext,
&isnull);
if (isnull)
flags |= SK_ISNULL;
run_keys[j] = NO_OP;
}
}
else if (leftop != NULL &&
is_funcclause(leftop) &&
@ -779,7 +794,6 @@ ExecInitIndexScan(IndexScan *node, EState *estate, Plan *parent)
*/
run_keys[j] = NO_OP;
scanvalue = ((Const *) rightop)->constvalue;
#ifdef INDEXSCAN_PATCH
}
else if (IsA(rightop, Param))
{
@ -790,13 +804,24 @@ ExecInitIndexScan(IndexScan *node, EState *estate, Plan *parent)
* it identifies the value to place in our scan key.
* ----------------
*/
run_keys[j] = NO_OP;
scanvalue = ExecEvalParam((Param *) rightop,
scanstate->cstate.cs_ExprContext,
&isnull);
if (isnull)
flags |= SK_ISNULL;
#endif
/* Life was so easy before ... subselects */
if ( ((Param *) rightop)->paramkind == PARAM_EXEC )
{
have_runtime_keys = true;
run_keys[j] = RIGHT_OP;
execParam = lappendi (execParam, ((Param*) rightop)->paramid);
}
else
{
scanvalue = ExecEvalParam((Param *) rightop,
scanstate->cstate.cs_ExprContext,
&isnull);
if (isnull)
flags |= SK_ISNULL;
run_keys[j] = NO_OP;
}
}
else if (rightop != NULL &&
is_funcclause(rightop) &&
@ -964,7 +989,13 @@ ExecInitIndexScan(IndexScan *node, EState *estate, Plan *parent)
indexstate->iss_ScanDescs = scanDescs;
indexstate->cstate.cs_TupFromTlist = false;
/*
* if there are some PARAM_EXEC in skankeys then
* force index rescan on first scan.
*/
((Plan*) node)->chgParam = execParam;
/* ----------------
* all done.
* ----------------