src/include/executor/nodeHash.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * nodeHash.h
   4  *        prototypes for nodeHash.c
   5  *
   6  *
   7  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
   8  * Portions Copyright (c) 1994, Regents of the University of California
   9  *
  10  * $Id: nodeHash.h,v 1.31 2003/08/04 00:43:30 momjian Exp $
  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);
  21 extern TupleTableSlot *ExecHash(HashState *node);
  22 extern void ExecEndHash(HashState *node);
  23 extern void ExecReScanHash(HashState *node, ExprContext *exprCtxt);
  24
  25 extern HashJoinTable ExecHashTableCreate(Hash *node, List *hashOperators);
  26 extern void ExecHashTableDestroy(HashJoinTable hashtable);
  27 extern void ExecHashTableInsert(HashJoinTable hashtable,
  28                                         ExprContext *econtext,
  29                                         List *hashkeys);
  30 extern int ExecHashGetBucket(HashJoinTable hashtable,
  31                                   ExprContext *econtext,
  32                                   List *hashkeys);
  33 extern int      ExecHashGetBatch(int bucketno, HashJoinTable hashtable);
  34 extern HeapTuple ExecScanHashBucket(HashJoinState *hjstate, List *hjclauses,
  35                                    ExprContext *econtext);
  36 extern void ExecHashTableReset(HashJoinTable hashtable, long ntuples);
  37 extern void ExecChooseHashTableSize(double ntuples, int tupwidth,
  38                                                 int *virtualbuckets,
  39                                                 int *physicalbuckets,
  40                                                 int *numbatches);
  41
  42 #endif   /* NODEHASH_H */