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Repair problems with EvalPlanQual where target table is scanned as
inner indexscan (ie, one with runtime keys). ExecIndexReScan must compute or recompute runtime keys even if we are rescanning in the EPQ case. TidScan seems to have comparable problems. Per bug noted by Barry Lind 11-Feb-02.
This commit is contained in:
Tom Lane
parent
0cdf4d96bc
commit
6799a6ca21
@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/executor/nodeIndexscan.c,v 1.65 2001/11/12 17:18:06 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/executor/nodeIndexscan.c,v 1.66 2002/02/11 20:10:48 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -301,24 +301,13 @@ ExecIndexReScan(IndexScan *node, ExprContext *exprCtxt, Plan *parent)
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IndexScanState *indexstate;
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ExprContext *econtext;
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ScanDirection direction;
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int numIndices;
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IndexScanDescPtr scanDescs;
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ScanKey *scanKeys;
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IndexScanDesc scan;
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ScanKey skey;
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int numIndices;
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int i;
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int **runtimeKeyInfo;
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int *numScanKeys;
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List *indxqual;
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List *qual;
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int n_keys;
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ScanKey scan_keys;
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int *run_keys;
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int i;
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int j;
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Expr *clause;
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Node *scanexpr;
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Datum scanvalue;
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bool isNull;
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estate = node->scan.plan.state;
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indexstate = node->indxstate;
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@ -330,10 +319,6 @@ ExecIndexReScan(IndexScan *node, ExprContext *exprCtxt, Plan *parent)
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scanKeys = indexstate->iss_ScanKeys;
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runtimeKeyInfo = indexstate->iss_RuntimeKeyInfo;
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numScanKeys = indexstate->iss_NumScanKeys;
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if (ScanDirectionIsBackward(node->indxorderdir))
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indexstate->iss_IndexPtr = numIndices;
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else
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indexstate->iss_IndexPtr = -1;
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if (econtext)
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{
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@ -359,28 +344,27 @@ ExecIndexReScan(IndexScan *node, ExprContext *exprCtxt, Plan *parent)
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ResetExprContext(econtext);
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}
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/* If this is re-scanning of PlanQual ... */
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if (estate->es_evTuple != NULL &&
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estate->es_evTuple[node->scan.scanrelid - 1] != NULL)
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{
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estate->es_evTupleNull[node->scan.scanrelid - 1] = false;
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return;
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}
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/*
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* get the index qualifications and recalculate the appropriate values
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* If we are doing runtime key calculations (ie, the index keys depend
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* on data from an outer scan), compute the new key values
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*/
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indxqual = node->indxqual;
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for (i = 0; i < numIndices; i++)
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if (runtimeKeyInfo)
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{
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qual = lfirst(indxqual);
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indxqual = lnext(indxqual);
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n_keys = numScanKeys[i];
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scan_keys = (ScanKey) scanKeys[i];
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List *indxqual;
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if (runtimeKeyInfo)
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indxqual = node->indxqual;
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for (i = 0; i < numIndices; i++)
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{
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List *qual = lfirst(indxqual);
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int n_keys;
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ScanKey scan_keys;
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int *run_keys;
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indxqual = lnext(indxqual);
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n_keys = numScanKeys[i];
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scan_keys = scanKeys[i];
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run_keys = runtimeKeyInfo[i];
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for (j = 0; j < n_keys; j++)
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{
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/*
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@ -398,7 +382,11 @@ ExecIndexReScan(IndexScan *node, ExprContext *exprCtxt, Plan *parent)
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*/
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if (run_keys[j] != NO_OP)
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{
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clause = nth(j, qual);
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Expr *clause = nth(j, qual);
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Node *scanexpr;
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Datum scanvalue;
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bool isNull;
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scanexpr = (run_keys[j] == RIGHT_OP) ?
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(Node *) get_rightop(clause) :
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(Node *) get_leftop(clause);
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@ -415,13 +403,31 @@ ExecIndexReScan(IndexScan *node, ExprContext *exprCtxt, Plan *parent)
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}
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}
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}
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scan = scanDescs[i];
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skey = scanKeys[i];
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index_rescan(scan, direction, skey);
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indexstate->iss_RuntimeKeysReady = true;
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}
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if (runtimeKeyInfo)
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indexstate->iss_RuntimeKeysReady = true;
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/* If this is re-scanning of PlanQual ... */
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if (estate->es_evTuple != NULL &&
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estate->es_evTuple[node->scan.scanrelid - 1] != NULL)
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{
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estate->es_evTupleNull[node->scan.scanrelid - 1] = false;
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return;
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}
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/* reset index scans */
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if (ScanDirectionIsBackward(node->indxorderdir))
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indexstate->iss_IndexPtr = numIndices;
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else
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indexstate->iss_IndexPtr = -1;
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for (i = 0; i < numIndices; i++)
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{
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IndexScanDesc scan = scanDescs[i];
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ScanKey skey = scanKeys[i];
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index_rescan(scan, direction, skey);
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}
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}
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/* ----------------------------------------------------------------
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/executor/nodeTidscan.c,v 1.21 2001/10/28 06:25:43 momjian Exp $
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* $Header: /cvsroot/pgsql/src/backend/executor/nodeTidscan.c,v 1.22 2002/02/11 20:10:50 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -108,6 +108,11 @@ TidNext(TidScan *node)
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if (estate->es_evTupleNull[node->scan.scanrelid - 1])
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return slot; /* return empty slot */
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/*
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* XXX shouldn't we check here to make sure tuple matches TID list?
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* In runtime-key case this is not certain, is it?
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*/
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ExecStoreTuple(estate->es_evTuple[node->scan.scanrelid - 1],
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slot, InvalidBuffer, false);
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@ -250,9 +255,8 @@ ExecTidReScan(TidScan *node, ExprContext *exprCtxt, Plan *parent)
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TidScanState *tidstate;
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ItemPointerData *tidList;
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tidstate = node->tidstate;
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estate = node->scan.plan.state;
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tidstate->tss_TidPtr = -1;
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tidstate = node->tidstate;
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tidList = tidstate->tss_TidList;
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/* If we are being passed an outer tuple, save it for runtime key calc */
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@ -260,6 +264,13 @@ ExecTidReScan(TidScan *node, ExprContext *exprCtxt, Plan *parent)
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node->scan.scanstate->cstate.cs_ExprContext->ecxt_outertuple =
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exprCtxt->ecxt_outertuple;
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/* do runtime calc of target TIDs, if needed */
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if (node->needRescan)
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tidstate->tss_NumTids =
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TidListCreate(node->tideval,
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node->scan.scanstate->cstate.cs_ExprContext,
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tidList);
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/* If this is re-scanning of PlanQual ... */
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if (estate->es_evTuple != NULL &&
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estate->es_evTuple[node->scan.scanrelid - 1] != NULL)
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@ -268,9 +279,7 @@ ExecTidReScan(TidScan *node, ExprContext *exprCtxt, Plan *parent)
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return;
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}
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tidstate->tss_NumTids = TidListCreate(node->tideval,
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node->scan.scanstate->cstate.cs_ExprContext,
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tidList);
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tidstate->tss_TidPtr = -1;
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/*
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* perhaps return something meaningful
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@ -432,7 +441,9 @@ ExecInitTidScan(TidScan *node, EState *estate, Plan *parent)
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tidList = (ItemPointerData *) palloc(length(node->tideval) * sizeof(ItemPointerData));
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numTids = 0;
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if (!node->needRescan)
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numTids = TidListCreate(node->tideval, scanstate->cstate.cs_ExprContext, tidList);
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numTids = TidListCreate(node->tideval,
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scanstate->cstate.cs_ExprContext,
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tidList);
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tidPtr = -1;
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CXT1_printf("ExecInitTidScan: context is %d\n", CurrentMemoryContext);
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