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Tom Lane
d583f10b7e
This is a heavily revised version of builtin_knngist_core-0.9. The ordering operators are no longer mixed in with actual quals, which would have confused not only humans but significant parts of the planner. Instead, ordering operators are carried separately throughout planning and execution. Since the API for ambeginscan and amrescan functions had to be changed anyway, this commit takes the opportunity to rationalize that a bit. RelationGetIndexScan no longer forces a premature index_rescan call; instead, callers of index_beginscan must call index_rescan too. Aside from making the AM-side initialization logic a bit less peculiar, this has the advantage that we do not make a useless extra am_rescan call when there are runtime key values. AMs formerly could not assume that the key values passed to amrescan were actually valid; now they can. Teodor Sigaev and Tom Lane
39 lines
1.5 KiB
C
39 lines
1.5 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) 1996-2010, 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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* src/include/executor/nodeIndexscan.h
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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 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 ExecReScanIndexScan(IndexScanState *node);
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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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Index scanrelid, List *quals, bool isorderby,
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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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