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bits indicating which optional capabilities can actually be exercised at runtime. This will allow Sort and Material nodes, and perhaps later other nodes, to avoid unnecessary overhead in common cases. This commit just adds the infrastructure and arranges to pass the correct flag values down to plan nodes; none of the actual optimizations are here yet. I'm committing this separately in case anyone wants to measure the added overhead. (It should be negligible.) Simon Riggs and Tom Lane
40 lines
1.6 KiB
C
40 lines
1.6 KiB
C
/*-------------------------------------------------------------------------
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*
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* nodeIndexscan.h
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*
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*
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*
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* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/executor/nodeIndexscan.h,v 1.27 2006/02/28 04:10:28 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef NODEINDEXSCAN_H
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#define NODEINDEXSCAN_H
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#include "nodes/execnodes.h"
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extern int ExecCountSlotsIndexScan(IndexScan *node);
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extern IndexScanState *ExecInitIndexScan(IndexScan *node, EState *estate, int eflags);
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extern TupleTableSlot *ExecIndexScan(IndexScanState *node);
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extern void ExecEndIndexScan(IndexScanState *node);
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extern void ExecIndexMarkPos(IndexScanState *node);
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extern void ExecIndexRestrPos(IndexScanState *node);
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extern void ExecIndexReScan(IndexScanState *node, ExprContext *exprCtxt);
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/* routines exported to share code with nodeBitmapIndexscan.c */
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extern void ExecIndexBuildScanKeys(PlanState *planstate, Relation index,
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List *quals, List *strategies, List *subtypes,
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ScanKey *scanKeys, int *numScanKeys,
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IndexRuntimeKeyInfo **runtimeKeys, int *numRuntimeKeys,
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IndexArrayKeyInfo **arrayKeys, int *numArrayKeys);
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extern void ExecIndexEvalRuntimeKeys(ExprContext *econtext,
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IndexRuntimeKeyInfo *runtimeKeys, int numRuntimeKeys);
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extern bool ExecIndexEvalArrayKeys(ExprContext *econtext,
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IndexArrayKeyInfo *arrayKeys, int numArrayKeys);
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extern bool ExecIndexAdvanceArrayKeys(IndexArrayKeyInfo *arrayKeys, int numArrayKeys);
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#endif /* NODEINDEXSCAN_H */
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