Viewing file:  nodeHash.h (1.88 KB) -rw-r--r--
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/*-------------------------------------------------------------------------
*
* nodeHash.h
* prototypes for nodeHash.c
*
*
* Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/executor/nodeHash.h
*
*-------------------------------------------------------------------------
*/
#ifndef NODEHASH_H
#define NODEHASH_H
#include "nodes/execnodes.h"
extern HashState *ExecInitHash(Hash *node, EState *estate, int eflags);
extern TupleTableSlot *ExecHash(HashState *node);
extern Node *MultiExecHash(HashState *node);
extern void ExecEndHash(HashState *node);
extern void ExecReScanHash(HashState *node);
extern HashJoinTable ExecHashTableCreate(Hash *node, List *hashOperators,
bool keepNulls);
extern void ExecHashTableDestroy(HashJoinTable hashtable);
extern void ExecHashTableInsert(HashJoinTable hashtable,
TupleTableSlot *slot,
uint32 hashvalue);
extern bool ExecHashGetHashValue(HashJoinTable hashtable,
ExprContext *econtext,
List *hashkeys,
bool outer_tuple,
bool keep_nulls,
uint32 *hashvalue);
extern void ExecHashGetBucketAndBatch(HashJoinTable hashtable,
uint32 hashvalue,
int *bucketno,
int *batchno);
extern bool ExecScanHashBucket(HashJoinState *hjstate, ExprContext *econtext);
extern void ExecPrepHashTableForUnmatched(HashJoinState *hjstate);
extern bool ExecScanHashTableForUnmatched(HashJoinState *hjstate,
ExprContext *econtext);
extern void ExecHashTableReset(HashJoinTable hashtable);
extern void ExecHashTableResetMatchFlags(HashJoinTable hashtable);
extern void ExecChooseHashTableSize(double ntuples, int tupwidth, bool useskew,
int *numbuckets,
int *numbatches,
int *num_skew_mcvs);
extern int ExecHashGetSkewBucket(HashJoinTable hashtable, uint32 hashvalue);
#endif /* NODEHASH_H */
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