src/include/executor/nodeHash.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * nodeHash.h
   4  *        prototypes for nodeHash.c
   5  *
   6  *
   7  * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
   8  * Portions Copyright (c) 1994, Regents of the University of California
   9  *
  10  * $PostgreSQL$
  11  *
  12  *-------------------------------------------------------------------------
  13  */
  14 #ifndef NODEHASH_H
  15 #define NODEHASH_H
  16
  17 #include "nodes/execnodes.h"
  18
  19 extern int      ExecCountSlotsHash(Hash *node);
  20 extern HashState *ExecInitHash(Hash *node, EState *estate, int eflags);
  21 extern TupleTableSlot *ExecHash(HashState *node);
  22 extern Node *MultiExecHash(HashState *node);
  23 extern void ExecEndHash(HashState *node);
  24 extern void ExecReScanHash(HashState *node, ExprContext *exprCtxt);
  25
  26 extern HashJoinTable ExecHashTableCreate(Hash *node, List *hashOperators);
  27 extern void ExecHashTableDestroy(HashJoinTable hashtable);
  28 extern void ExecHashTableInsert(HashJoinTable hashtable,
  29                                         TupleTableSlot *slot,
  30                                         uint32 hashvalue);
  31 extern bool ExecHashGetHashValue(HashJoinTable hashtable,
  32                                          ExprContext *econtext,
  33                                          List *hashkeys,
  34                                          bool outer_tuple,
  35                                          bool keep_nulls,
  36                                          uint32 *hashvalue);
  37 extern void ExecHashGetBucketAndBatch(HashJoinTable hashtable,
  38                                                   uint32 hashvalue,
  39                                                   int *bucketno,
  40                                                   int *batchno);
  41 extern HashJoinTuple ExecScanHashBucket(HashJoinState *hjstate,
  42                                    ExprContext *econtext);
  43 extern void ExecHashTableReset(HashJoinTable hashtable);
  44 extern void ExecChooseHashTableSize(double ntuples, int tupwidth,
  45                                                 int *numbuckets,
  46                                                 int *numbatches);
  47
  48 #endif   /* NODEHASH_H */