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69d34408e5
This patch doesn't put the new infrastructure to use anywhere, and indeed it's not clear how it could ever be used for something like postgres_fdw which has to send an SQL query and wait for a reply, but there might be FDWs or custom scan providers that are CPU-bound, so let's give them a way to join club parallel. KaiGai Kohei, reviewed by me.
40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
/* ------------------------------------------------------------------------
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*
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* nodeCustom.h
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*
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* prototypes for CustomScan nodes
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*
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* Portions Copyright (c) 1996-2016, 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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* ------------------------------------------------------------------------
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*/
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#ifndef NODECUSTOM_H
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#define NODECUSTOM_H
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#include "access/parallel.h"
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#include "nodes/execnodes.h"
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/*
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* General executor code
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*/
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extern CustomScanState *ExecInitCustomScan(CustomScan *custom_scan,
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EState *estate, int eflags);
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extern TupleTableSlot *ExecCustomScan(CustomScanState *node);
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extern void ExecEndCustomScan(CustomScanState *node);
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extern void ExecReScanCustomScan(CustomScanState *node);
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extern void ExecCustomMarkPos(CustomScanState *node);
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extern void ExecCustomRestrPos(CustomScanState *node);
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/*
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* Parallel execution support
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*/
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extern void ExecCustomScanEstimate(CustomScanState *node,
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ParallelContext *pcxt);
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extern void ExecCustomScanInitializeDSM(CustomScanState *node,
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ParallelContext *pcxt);
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extern void ExecCustomScanInitializeWorker(CustomScanState *node,
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shm_toc *toc);
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#endif /* NODECUSTOM_H */
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