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Previously, parallel index and index-only scans packed the parallel scan descriptor and shared instrumentation (for EXPLAIN ANALYZE) into a single DSM allocation. Since scans may be instrumented without being parallel-aware, and vice versa, using separate DSM chunks -- each with its own TOC key -- is cleaner. A future commit will extend this pattern to other scan node types. Author: Melanie Plageman <melanieplageman@gmail.com> Reviewed-by: Tomas Vondra <tomas@vondra.me> Discussion: https://postgr.es/m/flat/a177a6dd-240b-455a-8f25-aca0b1c08c6e%40vondra.me
54 lines
2.3 KiB
C
54 lines
2.3 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) 1996-2026, 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 "access/genam.h"
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#include "access/parallel.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 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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extern void ExecIndexScanEstimate(IndexScanState *node, ParallelContext *pcxt);
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extern void ExecIndexScanInitializeDSM(IndexScanState *node, ParallelContext *pcxt);
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extern void ExecIndexScanReInitializeDSM(IndexScanState *node, ParallelContext *pcxt);
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extern void ExecIndexScanInitializeWorker(IndexScanState *node,
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ParallelWorkerContext *pwcxt);
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extern void ExecIndexScanInstrumentEstimate(IndexScanState *node,
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ParallelContext *pcxt);
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extern void ExecIndexScanInstrumentInitDSM(IndexScanState *node,
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ParallelContext *pcxt);
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extern void ExecIndexScanInstrumentInitWorker(IndexScanState *node,
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ParallelWorkerContext *pwcxt);
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extern void ExecIndexScanRetrieveInstrumentation(IndexScanState *node);
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/*
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* These routines are exported to share code with nodeIndexonlyscan.c and
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* nodeBitmapIndexscan.c
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*/
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extern void ExecIndexBuildScanKeys(PlanState *planstate, Relation index,
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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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