~drizzle-trunk/drizzle/development

/* 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; version 2 of the License.

   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 */

#ifndef _myisammrg_h

#define _myisammrg_h

#ifdef	__cplusplus

extern "C" {

#endif

#ifndef _my_base_h

#include <my_base.h>

#endif

#ifndef _myisam_h

#include <myisam.h>

#endif

#include <queues.h>

#define MYRG_NAME_EXT	".MRG"

/* In which table to INSERT rows */

#define MERGE_INSERT_DISABLED	0

#define MERGE_INSERT_TO_FIRST	1

#define MERGE_INSERT_TO_LAST	2

extern TYPELIB merge_insert_method;

	/* Param to/from myrg_info */

typedef struct st_mymerge_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 */

  ulong *rec_per_key;			/* for sql optimizing */

} MYMERGE_INFO;

typedef struct st_myrg_table_info

{

  struct st_myisam_info *table;

  ulonglong file_offset;

} MYRG_TABLE;

typedef struct st_myrg_info

{

  MYRG_TABLE *open_tables,*current_table,*end_table,*last_used_table;

  ulonglong records;			/* records in tables */

  ulonglong del;			/* Removed records */

  ulonglong data_file_length;

  ulong  cache_size;

  uint	 merge_insert_method;

  uint	 tables,options,reclength,keys;

  my_bool cache_in_use;

  /* If MERGE children attached to parent. See top comment in ha_myisammrg.cc */

  my_bool children_attached;

  LIST	 open_list;

  QUEUE  by_key;

  ulong *rec_per_key_part;			/* for sql optimizing */

  pthread_mutex_t mutex;

} MYRG_INFO;

	/* Prototypes for merge-functions */

extern int myrg_close(MYRG_INFO *file);

extern int myrg_delete(MYRG_INFO *file,const uchar *buff);

extern MYRG_INFO *myrg_open(const char *name,int mode,int wait_if_locked);

extern MYRG_INFO *myrg_parent_open(const char *parent_name,

                                   int (*callback)(void*, const char*),

                                   void *callback_param);

extern int myrg_attach_children(MYRG_INFO *m_info, int handle_locking,

                                MI_INFO *(*callback)(void*),

                                void *callback_param);

extern int myrg_detach_children(MYRG_INFO *m_info);

extern int myrg_panic(enum ha_panic_function function);

extern int myrg_rfirst(MYRG_INFO *file,uchar *buf,int inx);

extern int myrg_rlast(MYRG_INFO *file,uchar *buf,int inx);

extern int myrg_rnext(MYRG_INFO *file,uchar *buf,int inx);

extern int myrg_rprev(MYRG_INFO *file,uchar *buf,int inx);

extern int myrg_rnext_same(MYRG_INFO *file,uchar *buf);

extern int myrg_rkey(MYRG_INFO *info,uchar *buf,int inx, const uchar *key,

                     key_part_map keypart_map, enum ha_rkey_function search_flag);

extern int myrg_rrnd(MYRG_INFO *file,uchar *buf,ulonglong pos);

extern int myrg_rsame(MYRG_INFO *file,uchar *record,int inx);

extern int myrg_update(MYRG_INFO *file,const uchar *old,uchar *new_rec);

extern int myrg_write(MYRG_INFO *info,uchar *rec);

extern int myrg_status(MYRG_INFO *file,MYMERGE_INFO *x,int flag);

extern int myrg_lock_database(MYRG_INFO *file,int lock_type);

extern int myrg_create(const char *name, const char **table_names,

                       uint insert_method, my_bool fix_names);

extern int myrg_extra(MYRG_INFO *file,enum ha_extra_function function,

		      void *extra_arg);

extern int myrg_reset(MYRG_INFO *info);

extern void myrg_extrafunc(MYRG_INFO *info,invalidator_by_filename inv);

extern ha_rows myrg_records_in_range(MYRG_INFO *info, int inx,

                                     key_range *min_key, key_range *max_key);

extern ulonglong myrg_position(MYRG_INFO *info);

#ifdef	__cplusplus

}

#endif

#endif