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434201d8d7
Note. all include files that have been hit so far have had extraneous
include files cleaned out and are reduced to...the lowest common
"include file", based on 'cc -Wall -I. test.c', where test.c is:
#include "postgres.h"
#include "<top of branches>" (ie. top of branches this time was utils/fcache2.h)
82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
/*-------------------------------------------------------------------------
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*
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* hashjoin.h--
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* internal structures for hash table and buckets
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*
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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* $Id: hashjoin.h,v 1.3 1996/11/04 08:52:46 scrappy Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef HASHJOIN_H
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#define HASHJOIN_H
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#include <storage/ipc.h>
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/* -----------------
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* have to use relative address as pointers in the hashtable
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* because the hashtable may reallocate in difference processes
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* -----------------
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*/
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typedef int RelativeAddr;
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/* ------------------
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* the relative addresses are always relative to the head of the
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* hashtable, the following macro converts them to absolute address.
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* ------------------
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*/
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#define ABSADDR(X) ((X) < 0 ? NULL: (char*)hashtable + X)
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#define RELADDR(X) (RelativeAddr)((char*)(X) - (char*)hashtable)
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typedef char **charPP;
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typedef int *intP;
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/* ----------------------------------------------------------------
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* hash-join hash table structures
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* ----------------------------------------------------------------
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*/
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typedef struct HashTableData {
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int nbuckets;
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int totalbuckets;
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int bucketsize;
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IpcMemoryId shmid;
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RelativeAddr top; /* char* */
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RelativeAddr bottom; /* char* */
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RelativeAddr overflownext; /* char* */
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RelativeAddr batch; /* char* */
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RelativeAddr readbuf; /* char* */
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int nbatch;
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RelativeAddr outerbatchNames; /* RelativeAddr* */
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RelativeAddr outerbatchPos; /* RelativeAddr* */
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RelativeAddr innerbatchNames; /* RelativeAddr* */
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RelativeAddr innerbatchPos; /* RelativeAddr* */
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RelativeAddr innerbatchSizes; /* int* */
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int curbatch;
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int nprocess;
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int pcount;
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} HashTableData; /* real hash table follows here */
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typedef HashTableData *HashJoinTable;
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typedef struct OverflowTupleData {
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RelativeAddr tuple; /* HeapTuple */
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RelativeAddr next; /* struct OverflowTupleData * */
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} OverflowTupleData; /* real tuple follows here */
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typedef OverflowTupleData *OverflowTuple;
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typedef struct HashBucketData {
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RelativeAddr top; /* HeapTuple */
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RelativeAddr bottom; /* HeapTuple */
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RelativeAddr firstotuple; /* OverflowTuple */
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RelativeAddr lastotuple; /* OverflowTuple */
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} HashBucketData; /* real bucket follows here */
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typedef HashBucketData *HashBucket;
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#define HASH_PERMISSION 0700
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#endif /* HASHJOIN_H */
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