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00001 /*------------------------------------------------------------------------- 00002 * 00003 * nodeHash.h 00004 * prototypes for nodeHash.c 00005 * 00006 * 00007 * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group 00008 * Portions Copyright (c) 1994, Regents of the University of California 00009 * 00010 * src/include/executor/nodeHash.h 00011 * 00012 *------------------------------------------------------------------------- 00013 */ 00014 #ifndef NODEHASH_H 00015 #define NODEHASH_H 00016 00017 #include "nodes/execnodes.h" 00018 00019 extern HashState *ExecInitHash(Hash *node, EState *estate, int eflags); 00020 extern TupleTableSlot *ExecHash(HashState *node); 00021 extern Node *MultiExecHash(HashState *node); 00022 extern void ExecEndHash(HashState *node); 00023 extern void ExecReScanHash(HashState *node); 00024 00025 extern HashJoinTable ExecHashTableCreate(Hash *node, List *hashOperators, 00026 bool keepNulls); 00027 extern void ExecHashTableDestroy(HashJoinTable hashtable); 00028 extern void ExecHashTableInsert(HashJoinTable hashtable, 00029 TupleTableSlot *slot, 00030 uint32 hashvalue); 00031 extern bool ExecHashGetHashValue(HashJoinTable hashtable, 00032 ExprContext *econtext, 00033 List *hashkeys, 00034 bool outer_tuple, 00035 bool keep_nulls, 00036 uint32 *hashvalue); 00037 extern void ExecHashGetBucketAndBatch(HashJoinTable hashtable, 00038 uint32 hashvalue, 00039 int *bucketno, 00040 int *batchno); 00041 extern bool ExecScanHashBucket(HashJoinState *hjstate, ExprContext *econtext); 00042 extern void ExecPrepHashTableForUnmatched(HashJoinState *hjstate); 00043 extern bool ExecScanHashTableForUnmatched(HashJoinState *hjstate, 00044 ExprContext *econtext); 00045 extern void ExecHashTableReset(HashJoinTable hashtable); 00046 extern void ExecHashTableResetMatchFlags(HashJoinTable hashtable); 00047 extern void ExecChooseHashTableSize(double ntuples, int tupwidth, bool useskew, 00048 int *numbuckets, 00049 int *numbatches, 00050 int *num_skew_mcvs); 00051 extern int ExecHashGetSkewBucket(HashJoinTable hashtable, uint32 hashvalue); 00052 00053 #endif /* NODEHASH_H */
1.7.1