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/*-------------------------------------------------------------------------
*
* nodeHash.h
*
*
*
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: nodeHash.h,v 1.28 2002/12/30 15:21:23 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef NODEHASH_H
#define NODEHASH_H
#include "nodes/execnodes.h"
extern int ExecCountSlotsHash(Hash *node);
extern HashState *ExecInitHash(Hash *node, EState *estate);
extern TupleTableSlot *ExecHash(HashState *node);
extern void ExecEndHash(HashState *node);
extern void ExecReScanHash(HashState *node, ExprContext *exprCtxt);
extern HashJoinTable ExecHashTableCreate(Hash *node);
extern void ExecHashTableDestroy(HashJoinTable hashtable);
extern void ExecHashTableInsert(HashJoinTable hashtable,
ExprContext *econtext,
List *hashkeys);
extern int ExecHashGetBucket(HashJoinTable hashtable,
ExprContext *econtext,
List *hashkeys);
extern int ExecHashGetBatch(int bucketno, HashJoinTable hashtable);
extern HeapTuple ExecScanHashBucket(HashJoinState *hjstate, List *hjclauses,
ExprContext *econtext);
extern void ExecHashTableReset(HashJoinTable hashtable, long ntuples);
extern void ExecChooseHashTableSize(double ntuples, int tupwidth,
int *virtualbuckets,
int *physicalbuckets,
int *numbatches);
extern uint32 ComputeHashFunc(Datum key, int typLen, bool byVal);
#endif /* NODEHASH_H */
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