mariadb/sql/ha_myisam.h

/* Copyright (C) 2000,2004 MySQL AB & MySQL Finland AB & TCX DataKonsult 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 */


#ifdef USE_PRAGMA_INTERFACE
#pragma interface			/* gcc class implementation */
#endif

/* class for the the myisam handler */

#include <myisam.h>
#include <ft_global.h>

#define HA_RECOVER_NONE		0	/* No automatic recover */
#define HA_RECOVER_DEFAULT	1	/* Automatic recover active */
#define HA_RECOVER_BACKUP	2	/* Make a backupfile on recover */
#define HA_RECOVER_FORCE	4	/* Recover even if we loose rows */
#define HA_RECOVER_QUICK	8	/* Don't check rows in data file */

extern ulong myisam_sort_buffer_size;
extern TYPELIB myisam_recover_typelib;
extern ulong myisam_recover_options;

class ha_myisam: public handler
{
  MI_INFO *file;
  ulong   int_table_flags;
  char    *data_file_name, *index_file_name;
  bool can_enable_indexes;
  int repair(THD *thd, MI_CHECK &param, bool optimize);

 public:
  ha_myisam(TABLE_SHARE *table_arg);
  ~ha_myisam() {}
  const char *table_type() const { return "MyISAM"; }
  const char *index_type(uint key_number);
  const char **bas_ext() const;
  ulonglong table_flags() const { return int_table_flags; }
  ulong index_flags(uint inx, uint part, bool all_parts) const
  {
    return ((table_share->key_info[inx].algorithm == HA_KEY_ALG_FULLTEXT) ?
            0 : HA_READ_NEXT | HA_READ_PREV | HA_READ_RANGE |
            HA_READ_ORDER | HA_KEYREAD_ONLY);
  }
  uint max_supported_keys()          const { return MI_MAX_KEY; }
  uint max_supported_key_length()    const { return MI_MAX_KEY_LENGTH; }
  uint max_supported_key_part_length() const { return MI_MAX_KEY_LENGTH; }
  uint checksum() const;

  virtual bool check_if_locking_is_allowed(uint sql_command,
                                           ulong type, TABLE *table,
                                           uint count,
                                           bool called_by_logger_thread);
  int open(const char *name, int mode, uint test_if_locked);
  int close(void);
  int write_row(byte * buf);
  int update_row(const byte * old_data, byte * new_data);
  int delete_row(const byte * buf);
  int index_read(byte * buf, const byte * key,
		 uint key_len, enum ha_rkey_function find_flag);
  int index_read_idx(byte * buf, uint idx, const byte * key,
		     uint key_len, enum ha_rkey_function find_flag);
  int index_read_last(byte * buf, const byte * key, uint key_len);
  int index_next(byte * buf);
  int index_prev(byte * buf);
  int index_first(byte * buf);
  int index_last(byte * buf);
  int index_next_same(byte *buf, const byte *key, uint keylen);
  int ft_init()
  {
    if (!ft_handler)
      return 1;
    ft_handler->please->reinit_search(ft_handler);
    return 0;
  }
  FT_INFO *ft_init_ext(uint flags, uint inx,String *key)
  {
    return ft_init_search(flags,file,inx,
                          (byte *)key->ptr(), key->length(), key->charset(),
                          table->record[0]);
  }
  int ft_read(byte *buf);
  int rnd_init(bool scan);
  int rnd_next(byte *buf);
  int rnd_pos(byte * buf, byte *pos);
  int restart_rnd_next(byte *buf, byte *pos);
  void position(const byte *record);
  void info(uint);
  int extra(enum ha_extra_function operation);
  int extra_opt(enum ha_extra_function operation, ulong cache_size);
  int reset(void);
  int external_lock(THD *thd, int lock_type);
  int delete_all_rows(void);
  int disable_indexes(uint mode);
  int enable_indexes(uint mode);
  int indexes_are_disabled(void);
  void start_bulk_insert(ha_rows rows);
  int end_bulk_insert();
  ha_rows records_in_range(uint inx, key_range *min_key, key_range *max_key);
  void update_create_info(HA_CREATE_INFO *create_info);
  int create(const char *name, TABLE *form, HA_CREATE_INFO *create_info);
  THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to,
			     enum thr_lock_type lock_type);
  virtual void get_auto_increment(ulonglong offset, ulonglong increment,
                                  ulonglong nb_desired_values,
                                  ulonglong *first_value,
                                  ulonglong *nb_reserved_values);
  int rename_table(const char * from, const char * to);
  int delete_table(const char *name);
  int check(THD* thd, HA_CHECK_OPT* check_opt);
  int analyze(THD* thd,HA_CHECK_OPT* check_opt);
  int repair(THD* thd, HA_CHECK_OPT* check_opt);
  bool check_and_repair(THD *thd);
  bool is_crashed() const;
  bool auto_repair() const { return myisam_recover_options != 0; }
  int optimize(THD* thd, HA_CHECK_OPT* check_opt);
  int restore(THD* thd, HA_CHECK_OPT* check_opt);
  int backup(THD* thd, HA_CHECK_OPT* check_opt);
  int assign_to_keycache(THD* thd, HA_CHECK_OPT* check_opt);
  int preload_keys(THD* thd, HA_CHECK_OPT* check_opt);
  bool check_if_incompatible_data(HA_CREATE_INFO *info, uint table_changes);
#ifdef HAVE_REPLICATION
  int dump(THD* thd, int fd);
  int net_read_dump(NET* net);
#endif
};