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a0fa0117a5
computation: reduce the bucket number mod nbatch. This changes the association between original bucket numbers and batches, but that doesn't matter. Minor other cleanups in hashjoin code to help centralize decisions.
44 lines
1.5 KiB
C
44 lines
1.5 KiB
C
/*-------------------------------------------------------------------------
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*
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* nodeHash.h
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*
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*
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*
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* Portions Copyright (c) 1996-2002, 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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* $Id: nodeHash.h,v 1.28 2002/12/30 15:21:23 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef NODEHASH_H
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#define NODEHASH_H
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#include "nodes/execnodes.h"
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extern int ExecCountSlotsHash(Hash *node);
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extern HashState *ExecInitHash(Hash *node, EState *estate);
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extern TupleTableSlot *ExecHash(HashState *node);
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extern void ExecEndHash(HashState *node);
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extern void ExecReScanHash(HashState *node, ExprContext *exprCtxt);
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extern HashJoinTable ExecHashTableCreate(Hash *node);
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extern void ExecHashTableDestroy(HashJoinTable hashtable);
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extern void ExecHashTableInsert(HashJoinTable hashtable,
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ExprContext *econtext,
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List *hashkeys);
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extern int ExecHashGetBucket(HashJoinTable hashtable,
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ExprContext *econtext,
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List *hashkeys);
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extern int ExecHashGetBatch(int bucketno, HashJoinTable hashtable);
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extern HeapTuple ExecScanHashBucket(HashJoinState *hjstate, List *hjclauses,
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ExprContext *econtext);
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extern void ExecHashTableReset(HashJoinTable hashtable, long ntuples);
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extern void ExecChooseHashTableSize(double ntuples, int tupwidth,
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int *virtualbuckets,
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int *physicalbuckets,
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int *numbatches);
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extern uint32 ComputeHashFunc(Datum key, int typLen, bool byVal);
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#endif /* NODEHASH_H */
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