ha_myisam.h
上传用户:tsgydb
上传日期:2007-04-14
资源大小:10674k
文件大小:5k
- /* Copyright (C) 2000 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 __GNUC__
- #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;
- uint int_option_flag;
- int repair(THD *thd, MI_CHECK ¶m, bool optimize);
- public:
- ha_myisam(TABLE *table): handler(table), file(0),
- int_option_flag(HA_READ_NEXT | HA_READ_PREV | HA_READ_RND_SAME |
- HA_KEYPOS_TO_RNDPOS | HA_READ_ORDER | HA_LASTKEY_ORDER |
- HA_HAVE_KEY_READ_ONLY | HA_READ_NOT_EXACT_KEY |
- HA_LONGLONG_KEYS | HA_NULL_KEY |
- HA_DUPP_POS | HA_BLOB_KEY | HA_AUTO_PART_KEY)
- {}
- ~ha_myisam() {}
- const char *table_type() const { return "MyISAM"; }
- const char **bas_ext() const;
- ulong option_flag() const { return int_option_flag; }
- uint max_record_length() const { return HA_MAX_REC_LENGTH; }
- uint max_keys() const { return MI_MAX_KEY; }
- uint max_key_parts() const { return MAX_REF_PARTS; }
- uint max_key_length() const { return MAX_KEY_LENGTH; }
- 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_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 index_end() { ft_handler=NULL; return 0; }
- int ft_init()
- { if(!ft_handler) return 1; ft_reinit_search(ft_handler); return 0; }
- void *ft_init_ext(uint inx,const byte *key, uint keylen, bool presort)
- { return ft_init_search(file,inx,(byte*) key,keylen,presort); }
- int ft_read(byte *buf);
- int rnd_init(bool scan=1);
- 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);
- my_off_t row_position() { return mi_position(file); }
- void info(uint);
- int extra(enum ha_extra_function operation);
- int reset(void);
- int external_lock(THD *thd, int lock_type);
- int delete_all_rows(void);
- void deactivate_non_unique_index(ha_rows rows);
- bool activate_all_index(THD *thd);
- ha_rows records_in_range(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);
- 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);
- longlong get_auto_increment();
- 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 dump(THD* thd, int fd);
- int net_read_dump(NET* net);
- };