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Previously, executor nodes running in parallel worker processes didn't have access to the dsm_segment object used for parallel execution. In order to support resource management based on DSM segment lifetime, they need that. So create a ParallelWorkerContext object to hold it and pass it to all InitializeWorker functions. Author: Thomas Munro Reviewed-By: Andres Freund Discussion: https://postgr.es/m/CAEepm=2W=cOkiZxcg6qiFQP-dHUe09aqTrEMM7yJDrHMhDv_RA@mail.gmail.com
31 lines
1 KiB
C
31 lines
1 KiB
C
/*-------------------------------------------------------------------------
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*
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* nodeSeqscan.h
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*
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*
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*
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* Portions Copyright (c) 1996-2017, 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/nodeSeqscan.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef NODESEQSCAN_H
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#define NODESEQSCAN_H
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#include "access/parallel.h"
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#include "nodes/execnodes.h"
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extern SeqScanState *ExecInitSeqScan(SeqScan *node, EState *estate, int eflags);
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extern void ExecEndSeqScan(SeqScanState *node);
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extern void ExecReScanSeqScan(SeqScanState *node);
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/* parallel scan support */
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extern void ExecSeqScanEstimate(SeqScanState *node, ParallelContext *pcxt);
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extern void ExecSeqScanInitializeDSM(SeqScanState *node, ParallelContext *pcxt);
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extern void ExecSeqScanReInitializeDSM(SeqScanState *node, ParallelContext *pcxt);
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extern void ExecSeqScanInitializeWorker(SeqScanState *node,
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ParallelWorkerContext *pwcxt);
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#endif /* NODESEQSCAN_H */
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