ha_innodb.h
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:9k
- /* Copyright (C) 2000 MySQL AB && Innobase Oy
- 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 is based on ha_berkeley.h of MySQL distribution
- This file defines the Innodb handler: the interface between MySQL and
- Innodb
- */
- #ifdef USE_PRAGMA_INTERFACE
- #pragma interface /* gcc class implementation */
- #endif
- typedef struct st_innobase_share {
- THR_LOCK lock;
- pthread_mutex_t mutex;
- char *table_name;
- uint table_name_length,use_count;
- } INNOBASE_SHARE;
- /* The class defining a handle to an Innodb table */
- class ha_innobase: public handler
- {
- void* innobase_prebuilt; /* (row_prebuilt_t*) prebuilt
- struct in Innodb, used to save
- CPU */
- THD* user_thd; /* the thread handle of the user
- currently using the handle; this is
- set in external_lock function */
- ulong last_query_id; /* the latest query id where the
- handle was used */
- THR_LOCK_DATA lock;
- INNOBASE_SHARE *share;
- gptr alloc_ptr;
- byte* upd_buff; /* buffer used in updates */
- byte* key_val_buff; /* buffer used in converting
- search key values from MySQL format
- to Innodb format */
- ulong upd_and_key_val_buff_len;
- /* the length of each of the previous
- two buffers */
- ulong int_table_flags;
- uint primary_key;
- uint last_dup_key;
- ulong start_of_scan; /* this is set to 1 when we are
- starting a table scan but have not
- yet fetched any row, else 0 */
- uint last_match_mode;/* match mode of the latest search:
- ROW_SEL_EXACT, ROW_SEL_EXACT_PREFIX,
- or undefined */
- uint num_write_row; /* number of write_row() calls */
- longlong auto_inc_counter_for_this_stat;
- ulong max_supported_row_length(const byte *buf);
- uint store_key_val_for_row(uint keynr, char* buff, uint buff_len,
- const byte* record);
- int update_thd(THD* thd);
- int change_active_index(uint keynr);
- int general_fetch(byte* buf, uint direction, uint match_mode);
- int innobase_read_and_init_auto_inc(longlong* ret);
- /* Init values for the class: */
- public:
- ha_innobase(TABLE *table): handler(table),
- int_table_flags(HA_REC_NOT_IN_SEQ |
- HA_NULL_IN_KEY | HA_FAST_KEY_READ |
- HA_CAN_INDEX_BLOBS |
- HA_CAN_SQL_HANDLER |
- HA_NOT_EXACT_COUNT |
- HA_PRIMARY_KEY_IN_READ_INDEX |
- HA_TABLE_SCAN_ON_INDEX),
- last_dup_key((uint) -1),
- start_of_scan(0),
- num_write_row(0)
- {
- }
- ~ha_innobase() {}
- const char* table_type() const { return("InnoDB");}
- const char *index_type(uint key_number) { return "BTREE"; }
- const char** bas_ext() const;
- ulong table_flags() const { return int_table_flags; }
- ulong index_flags(uint idx, uint part, bool all_parts) const
- {
- return (HA_READ_NEXT | HA_READ_PREV | HA_READ_ORDER | HA_READ_RANGE |
- HA_KEYREAD_ONLY);
- }
- uint max_supported_keys() const { return MAX_KEY; }
- /* An InnoDB page must store >= 2 keys;
- a secondary key record must also contain the
- primary key value:
- max key length is therefore set to slightly
- less than 1 / 4 of page size which is 16 kB;
- but currently MySQL does not work with keys
- whose size is > MAX_KEY_LENGTH */
- uint max_supported_key_length() const { return 3500; }
- uint max_supported_key_part_length() const { return 3500; }
- const key_map *keys_to_use_for_scanning() { return &key_map_full; }
- bool has_transactions() { return 1;}
- int open(const char *name, int mode, uint test_if_locked);
- int close(void);
- double scan_time();
- double read_time(uint index, uint ranges, ha_rows rows);
- int write_row(byte * buf);
- int update_row(const byte * old_data, byte * new_data);
- int delete_row(const byte * buf);
- int index_init(uint index);
- int index_end();
- int index_read(byte * buf, const byte * key,
- uint key_len, enum ha_rkey_function find_flag);
- int index_read_idx(byte * buf, uint index, 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_next_same(byte * buf, const byte *key, uint keylen);
- int index_prev(byte * buf);
- int index_first(byte * buf);
- int index_last(byte * buf);
- int rnd_init(bool scan);
- int rnd_end();
- int rnd_next(byte *buf);
- int rnd_pos(byte * buf, byte *pos);
- void position(const byte *record);
- void info(uint);
- int analyze(THD* thd,HA_CHECK_OPT* check_opt);
- int optimize(THD* thd,HA_CHECK_OPT* check_opt);
- int discard_or_import_tablespace(my_bool discard);
- int extra(enum ha_extra_function operation);
- int external_lock(THD *thd, int lock_type);
- int start_stmt(THD *thd);
- void position(byte *record);
- ha_rows records_in_range(uint inx, key_range *min_key, key_range *max_key);
- ha_rows estimate_rows_upper_bound();
- int create(const char *name, register TABLE *form,
- HA_CREATE_INFO *create_info);
- int delete_table(const char *name);
- int rename_table(const char* from, const char* to);
- int check(THD* thd, HA_CHECK_OPT* check_opt);
- char* update_table_comment(const char* comment);
- char* get_foreign_key_create_info();
- bool can_switch_engines();
- uint referenced_by_foreign_key();
- void free_foreign_key_create_info(char* str);
- THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to,
- enum thr_lock_type lock_type);
- void init_table_handle_for_HANDLER();
- longlong get_auto_increment();
- uint8 table_cache_type() { return HA_CACHE_TBL_ASKTRANSACT; }
- static char *get_mysql_bin_log_name();
- static ulonglong get_mysql_bin_log_pos();
- };
- extern uint innobase_init_flags, innobase_lock_type;
- extern uint innobase_flush_log_at_trx_commit;
- extern ulong innobase_cache_size;
- extern char *innobase_home, *innobase_tmpdir, *innobase_logdir;
- extern long innobase_lock_scan_time;
- extern long innobase_mirrored_log_groups, innobase_log_files_in_group;
- extern long innobase_log_file_size, innobase_log_buffer_size;
- extern long innobase_buffer_pool_size, innobase_additional_mem_pool_size;
- extern long innobase_buffer_pool_awe_mem_mb;
- extern long innobase_file_io_threads, innobase_lock_wait_timeout;
- extern long innobase_force_recovery, innobase_thread_concurrency;
- extern long innobase_open_files;
- extern char *innobase_data_home_dir, *innobase_data_file_path;
- extern char *innobase_log_group_home_dir, *innobase_log_arch_dir;
- extern char *innobase_unix_file_flush_method;
- /* The following variables have to be my_bool for SHOW VARIABLES to work */
- extern my_bool innobase_log_archive,
- innobase_use_native_aio, innobase_fast_shutdown,
- innobase_file_per_table, innobase_locks_unsafe_for_binlog,
- innobase_create_status_file;
- extern my_bool innobase_very_fast_shutdown; /* set this to 1 just before
- calling innobase_end() if you want
- InnoDB to shut down without
- flushing the buffer pool: this
- is equivalent to a 'crash' */
- extern "C" {
- extern ulong srv_max_buf_pool_modified_pct;
- extern ulong srv_max_purge_lag;
- extern ulong srv_auto_extend_increment;
- }
- extern TYPELIB innobase_lock_typelib;
- bool innobase_init(void);
- bool innobase_end(void);
- bool innobase_flush_logs(void);
- uint innobase_get_free_space(void);
- int innobase_commit(THD *thd, void* trx_handle);
- int innobase_report_binlog_offset_and_commit(
- THD* thd,
- void* trx_handle,
- char* log_file_name,
- my_off_t end_offset);
- int innobase_commit_complete(
- void* trx_handle);
- int innobase_rollback(THD *thd, void* trx_handle);
- int innobase_rollback_to_savepoint(
- THD* thd,
- char* savepoint_name,
- my_off_t* binlog_cache_pos);
- int innobase_savepoint(
- THD* thd,
- char* savepoint_name,
- my_off_t binlog_cache_pos);
- int innobase_close_connection(THD *thd);
- int innobase_drop_database(char *path);
- int innodb_show_status(THD* thd);
- my_bool innobase_query_caching_of_table_permitted(THD* thd, char* full_name,
- uint full_name_len);
- void innobase_release_temporary_latches(void* innobase_tid);
- void innobase_store_binlog_offset_and_flush_log(char *binlog_name,longlong offset);
- int innobase_start_trx_and_assign_read_view(THD* thd);