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/*-------------------------------------------------------------------------
*
* nodeHash.h
* prototypes for nodeHash.c
*
*
* Portions Copyright (c) 1996-2020, 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 "access/parallel.h"
#include "nodes/execnodes.h"
struct SharedHashJoinBatch;
extern HashState *ExecInitHash(Hash *node, EState *estate, int eflags);
extern Node *MultiExecHash(HashState *node);
extern void ExecEndHash(HashState *node);
extern void ExecReScanHash(HashState *node);
extern HashJoinTable ExecHashTableCreate(HashState *state, List *hashOperators, List *hashCollations,
bool keepNulls);
extern void ExecParallelHashTableAlloc(HashJoinTable hashtable,
int batchno);
extern void ExecHashTableDestroy(HashJoinTable hashtable);
extern void ExecHashTableDetach(HashJoinTable hashtable);
extern void ExecHashTableDetachBatch(HashJoinTable hashtable);
extern void ExecParallelHashTableSetCurrentBatch(HashJoinTable hashtable,
int batchno);
extern void ExecHashTableInsert(HashJoinTable hashtable,
TupleTableSlot *slot,
uint32 hashvalue);
extern void ExecParallelHashTableInsert(HashJoinTable hashtable,
TupleTableSlot *slot,
uint32 hashvalue);
extern void ExecParallelHashTableInsertCurrentBatch(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 bool ExecParallelScanHashBucket(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,
bool try_combined_hash_mem,
int parallel_workers,
size_t *space_allowed,
int *numbuckets,
int *numbatches,
int *num_skew_mcvs);
extern int ExecHashGetSkewBucket(HashJoinTable hashtable, uint32 hashvalue);
extern void ExecHashEstimate(HashState *node, ParallelContext *pcxt);
extern void ExecHashInitializeDSM(HashState *node, ParallelContext *pcxt);
extern void ExecHashInitializeWorker(HashState *node, ParallelWorkerContext *pwcxt);
extern void ExecHashRetrieveInstrumentation(HashState *node);
extern void ExecShutdownHash(HashState *node);
extern void ExecHashAccumInstrumentation(HashInstrumentation *instrument,
HashJoinTable hashtable);
#endif /* NODEHASH_H */
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