ha_innobase.h
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上传日期:2007-04-14
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文件大小:6k
- /* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
- && Innobase Oy
- -This file is modified from ha_berkeley.h of MySQL distribution-
- 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
- /* This file defines the Innobase handler: the interface between MySQL and
- Innobase */
- 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 Innobase table */
- class ha_innobase: public handler
- {
- void* innobase_prebuilt; /* (row_prebuilt_t*) prebuilt
- struct in Innobase, used to save
- CPU */
- THD* user_thd; /* the thread handle of the user
- currently using the handle; this is
- set in external_lock function */
- 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 Innobase format */
- uint ref_stored_len; /* length of the key value stored to
- 'ref' buffer of the handle, if any */
- ulong int_option_flag;
- 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 */
- ulong max_row_length(const byte *buf);
- uint store_key_val_for_row(uint keynr, char* buff, const byte* record);
- int update_thd(THD* thd);
- int change_active_index(uint keynr);
- int general_fetch(byte* buf, uint direction, uint match_mode);
- /* Init values for the class: */
- public:
- ha_innobase(TABLE *table): handler(table),
- int_option_flag(HA_READ_NEXT | HA_READ_PREV | HA_READ_ORDER |
- HA_REC_NOT_IN_SEQ |
- HA_KEYPOS_TO_RNDPOS | HA_LASTKEY_ORDER |
- HA_HAVE_KEY_READ_ONLY | HA_READ_NOT_EXACT_KEY |
- HA_LONGLONG_KEYS | HA_NULL_KEY |
- HA_NOT_EXACT_COUNT |
- HA_NO_WRITE_DELAYED |
- HA_PRIMARY_KEY_IN_READ_INDEX |
- HA_DROP_BEFORE_CREATE |
- HA_NOT_READ_AFTER_KEY),
- last_dup_key((uint) -1),
- start_of_scan(0)
- {
- }
- ~ha_innobase() {}
- const char* table_type() const { return("Innobase");}
- 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 MAX_KEY; }
- uint max_key_parts() const { return MAX_REF_PARTS; }
- uint max_key_length() const { return MAX_KEY_LENGTH; }
- bool fast_key_read() { return 1;}
- bool has_transactions() { return 1;}
- int open(const char *name, int mode, uint test_if_locked);
- void initialize(void);
- int close(void);
- double scan_time();
- 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_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=1);
- int rnd_end();
- int rnd_next(byte *buf);
- int rnd_pos(byte * buf, byte *pos);
- void position(const byte *record);
- void info(uint);
- int extra(enum ha_extra_function operation);
- int reset(void);
- int external_lock(THD *thd, int lock_type);
- void position(byte *record);
- 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);
- 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);
- char* update_table_comment(const char* comment);
- THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to,
- enum thr_lock_type lock_type);
- };
- extern bool innobase_skip;
- extern uint innobase_init_flags, innobase_lock_type;
- 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_file_io_threads, innobase_lock_wait_timeout;
- extern char *innobase_data_home_dir, *innobase_data_file_path;
- extern char *innobase_log_group_home_dir, *innobase_log_arch_dir;
- extern bool innobase_flush_log_at_trx_commit, innobase_log_archive,
- innobase_use_native_aio;
- 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_rollback(THD *thd, void* trx_handle);
- int innobase_close_connection(THD *thd);