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6b65a7fe62
With the introduction of a shared memory record typmod registry, it is no longer necessary to remap record typmods when sending tuples between backends so most of tqueue.c can be removed. Author: Thomas Munro Reviewed-By: Andres Freund Discussion: https://postgr.es/m/CAEepm=0ZtQ-SpsgCyzzYpsXS6e=kZWqk3g5Ygn3MDV7A8dabUA@mail.gmail.com
48 lines
1.8 KiB
C
48 lines
1.8 KiB
C
/*--------------------------------------------------------------------
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* execParallel.h
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* POSTGRES parallel execution interface
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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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* IDENTIFICATION
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* src/include/executor/execParallel.h
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*--------------------------------------------------------------------
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*/
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#ifndef EXECPARALLEL_H
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#define EXECPARALLEL_H
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#include "access/parallel.h"
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#include "nodes/execnodes.h"
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#include "nodes/parsenodes.h"
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#include "nodes/plannodes.h"
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#include "utils/dsa.h"
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typedef struct SharedExecutorInstrumentation SharedExecutorInstrumentation;
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typedef struct ParallelExecutorInfo
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{
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PlanState *planstate; /* plan subtree we're running in parallel */
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ParallelContext *pcxt; /* parallel context we're using */
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BufferUsage *buffer_usage; /* points to bufusage area in DSM */
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SharedExecutorInstrumentation *instrumentation; /* optional */
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dsa_area *area; /* points to DSA area in DSM */
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bool finished; /* set true by ExecParallelFinish */
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/* These two arrays have pcxt->nworkers_launched entries: */
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shm_mq_handle **tqueue; /* tuple queues for worker output */
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struct TupleQueueReader **reader; /* tuple reader/writer support */
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} ParallelExecutorInfo;
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extern ParallelExecutorInfo *ExecInitParallelPlan(PlanState *planstate,
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EState *estate, int nworkers, int64 tuples_needed);
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extern void ExecParallelCreateReaders(ParallelExecutorInfo *pei);
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extern void ExecParallelFinish(ParallelExecutorInfo *pei);
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extern void ExecParallelCleanup(ParallelExecutorInfo *pei);
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extern void ExecParallelReinitialize(PlanState *planstate,
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ParallelExecutorInfo *pei);
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extern void ParallelQueryMain(dsm_segment *seg, shm_toc *toc);
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#endif /* EXECPARALLEL_H */
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