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/* Copyright (C) 2000 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/* This file should be included when using merge_isam_funktions */
/* Author: Michael Widenius */
#ifndef _merge_h
#define _merge_h
#ifdef __cplusplus
extern "C" {
#endif
#ifndef _my_base_h
#include <my_base.h>
#endif
#ifndef _nisam_h
#include <nisam.h>
#endif
#define MRG_NAME_EXT ".MRG"
/* Param to/from mrg_info */
typedef struct st_mrg_info /* Struct from h_info */
{
ulonglong records; /* Records in database */
ulonglong deleted; /* Deleted records in database */
ulonglong recpos; /* Pos for last used record */
ulonglong data_file_length;
uint reclength; /* Recordlength */
int errkey; /* With key was dupplicated on err */
uint options; /* HA_OPTION_... used */
} MERGE_INFO;
typedef struct st_mrg_table_info
{
N_INFO *table;
ulonglong file_offset;
} MRG_TABLE;
typedef struct st_merge
{
MRG_TABLE *open_tables,*current_table,*end_table,*last_used_table;
ulonglong records; /* records in tables */
ulonglong del; /* Removed records */
ulonglong data_file_length;
uint tables,options,reclength;
my_bool cache_in_use;
LIST open_list;
} MRG_INFO;
typedef ulong mrg_off_t;
/* Prototypes for merge-functions */
extern int mrg_close(MRG_INFO *file);
extern int mrg_delete(MRG_INFO *file,const byte *buff);
extern MRG_INFO *mrg_open(const char *name,int mode,int wait_if_locked);
extern int mrg_panic(enum ha_panic_function function);
extern int mrg_rfirst(MRG_INFO *file,byte *buf,int inx);
extern int mrg_rkey(MRG_INFO *file,byte *buf,int inx,const byte *key,
uint key_len, enum ha_rkey_function search_flag);
extern int mrg_rrnd(MRG_INFO *file,byte *buf, mrg_off_t pos);
extern int mrg_rsame(MRG_INFO *file,byte *record,int inx);
extern int mrg_update(MRG_INFO *file,const byte *old,const byte *new_rec);
extern int mrg_info(MRG_INFO *file,MERGE_INFO *x,int flag);
extern int mrg_lock_database(MRG_INFO *file,int lock_type);
extern int mrg_create(const char *name,const char **table_names);
extern int mrg_extra(MRG_INFO *file,enum ha_extra_function function);
extern ha_rows mrg_records_in_range(MRG_INFO *info,int inx,
const byte *start_key,uint start_key_len,
enum ha_rkey_function start_search_flag,
const byte *end_key,uint end_key_len,
enum ha_rkey_function end_search_flag);
extern mrg_off_t mrg_position(MRG_INFO *info);
#ifdef __cplusplus
}
#endif
#endif
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