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usr
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pgsql-9.6
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include
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server
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executor
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Filename :
nodeHash.h
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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 */