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243 lines
8.6 KiB
C++
243 lines
8.6 KiB
C++
/* Copyright (C) 2000 MySQL AB && Innobase Oy
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/*
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This file is based on ha_berkeley.h of MySQL distribution
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This file defines the Innodb handler: the interface between MySQL and
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Innodb
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*/
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#ifdef USE_PRAGMA_INTERFACE
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#pragma interface /* gcc class implementation */
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#endif
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typedef struct st_innobase_share {
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THR_LOCK lock;
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pthread_mutex_t mutex;
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char *table_name;
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uint table_name_length,use_count;
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} INNOBASE_SHARE;
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/* The class defining a handle to an Innodb table */
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class ha_innobase: public handler
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{
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void* innobase_prebuilt; /* (row_prebuilt_t*) prebuilt
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struct in Innodb, used to save
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CPU */
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THD* user_thd; /* the thread handle of the user
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currently using the handle; this is
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set in external_lock function */
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ulong last_query_id; /* the latest query id where the
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handle was used */
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THR_LOCK_DATA lock;
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INNOBASE_SHARE *share;
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gptr alloc_ptr;
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byte* upd_buff; /* buffer used in updates */
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byte* key_val_buff; /* buffer used in converting
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search key values from MySQL format
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to Innodb format */
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ulong upd_and_key_val_buff_len;
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/* the length of each of the previous
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two buffers */
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ulong int_table_flags;
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uint primary_key;
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uint last_dup_key;
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ulong start_of_scan; /* this is set to 1 when we are
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starting a table scan but have not
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yet fetched any row, else 0 */
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uint last_match_mode;/* match mode of the latest search:
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ROW_SEL_EXACT, ROW_SEL_EXACT_PREFIX,
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or undefined */
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uint num_write_row; /* number of write_row() calls */
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longlong auto_inc_counter_for_this_stat;
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ulong max_supported_row_length(const byte *buf);
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uint store_key_val_for_row(uint keynr, char* buff, uint buff_len,
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const byte* record);
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int update_thd(THD* thd);
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int change_active_index(uint keynr);
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int general_fetch(byte* buf, uint direction, uint match_mode);
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int innobase_read_and_init_auto_inc(longlong* ret);
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/* Init values for the class: */
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public:
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ha_innobase(TABLE *table): handler(table),
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int_table_flags(HA_REC_NOT_IN_SEQ |
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HA_NULL_IN_KEY | HA_FAST_KEY_READ |
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HA_CAN_INDEX_BLOBS |
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HA_CAN_SQL_HANDLER |
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HA_NOT_EXACT_COUNT |
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HA_PRIMARY_KEY_IN_READ_INDEX |
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HA_TABLE_SCAN_ON_INDEX),
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last_dup_key((uint) -1),
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start_of_scan(0),
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num_write_row(0)
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{
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}
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~ha_innobase() {}
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const char* table_type() const { return("InnoDB");}
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const char *index_type(uint key_number) { return "BTREE"; }
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const char** bas_ext() const;
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ulong table_flags() const { return int_table_flags; }
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ulong index_flags(uint idx, uint part, bool all_parts) const
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{
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return (HA_READ_NEXT | HA_READ_PREV | HA_READ_ORDER | HA_READ_RANGE |
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HA_KEYREAD_ONLY);
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}
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uint max_supported_keys() const { return MAX_KEY; }
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/* An InnoDB page must store >= 2 keys;
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a secondary key record must also contain the
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primary key value:
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max key length is therefore set to slightly
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less than 1 / 4 of page size which is 16 kB;
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but currently MySQL does not work with keys
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whose size is > MAX_KEY_LENGTH */
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uint max_supported_key_length() const { return 3500; }
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uint max_supported_key_part_length() const { return 3500; }
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const key_map *keys_to_use_for_scanning() { return &key_map_full; }
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bool has_transactions() { return 1;}
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int open(const char *name, int mode, uint test_if_locked);
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int close(void);
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double scan_time();
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double read_time(uint index, uint ranges, ha_rows rows);
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int write_row(byte * buf);
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int update_row(const byte * old_data, byte * new_data);
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int delete_row(const byte * buf);
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int index_init(uint index);
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int index_end();
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int index_read(byte * buf, const byte * key,
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uint key_len, enum ha_rkey_function find_flag);
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int index_read_idx(byte * buf, uint index, const byte * key,
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uint key_len, enum ha_rkey_function find_flag);
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int index_read_last(byte * buf, const byte * key, uint key_len);
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int index_next(byte * buf);
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int index_next_same(byte * buf, const byte *key, uint keylen);
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int index_prev(byte * buf);
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int index_first(byte * buf);
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int index_last(byte * buf);
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int rnd_init(bool scan);
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int rnd_end();
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int rnd_next(byte *buf);
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int rnd_pos(byte * buf, byte *pos);
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void position(const byte *record);
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void info(uint);
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int analyze(THD* thd,HA_CHECK_OPT* check_opt);
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int optimize(THD* thd,HA_CHECK_OPT* check_opt);
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int discard_or_import_tablespace(my_bool discard);
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int extra(enum ha_extra_function operation);
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int external_lock(THD *thd, int lock_type);
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int start_stmt(THD *thd);
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void position(byte *record);
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ha_rows records_in_range(uint inx, key_range *min_key, key_range *max_key);
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ha_rows estimate_rows_upper_bound();
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int create(const char *name, register TABLE *form,
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HA_CREATE_INFO *create_info);
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int delete_table(const char *name);
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int rename_table(const char* from, const char* to);
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int check(THD* thd, HA_CHECK_OPT* check_opt);
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char* update_table_comment(const char* comment);
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char* get_foreign_key_create_info();
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bool can_switch_engines();
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uint referenced_by_foreign_key();
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void free_foreign_key_create_info(char* str);
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THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to,
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enum thr_lock_type lock_type);
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void init_table_handle_for_HANDLER();
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longlong get_auto_increment();
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uint8 table_cache_type() { return HA_CACHE_TBL_ASKTRANSACT; }
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static char *get_mysql_bin_log_name();
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static ulonglong get_mysql_bin_log_pos();
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};
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extern uint innobase_init_flags, innobase_lock_type;
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extern uint innobase_flush_log_at_trx_commit;
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extern ulong innobase_cache_size;
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extern char *innobase_home, *innobase_tmpdir, *innobase_logdir;
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extern long innobase_lock_scan_time;
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extern long innobase_mirrored_log_groups, innobase_log_files_in_group;
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extern long innobase_log_file_size, innobase_log_buffer_size;
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extern long innobase_buffer_pool_size, innobase_additional_mem_pool_size;
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extern long innobase_buffer_pool_awe_mem_mb;
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extern long innobase_file_io_threads, innobase_lock_wait_timeout;
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extern long innobase_force_recovery, innobase_thread_concurrency;
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extern long innobase_open_files;
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extern char *innobase_data_home_dir, *innobase_data_file_path;
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extern char *innobase_log_group_home_dir, *innobase_log_arch_dir;
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extern char *innobase_unix_file_flush_method;
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/* The following variables have to be my_bool for SHOW VARIABLES to work */
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extern my_bool innobase_log_archive,
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innobase_use_native_aio, innobase_fast_shutdown,
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innobase_file_per_table, innobase_locks_unsafe_for_binlog,
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innobase_create_status_file;
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extern my_bool innobase_very_fast_shutdown; /* set this to 1 just before
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calling innobase_end() if you want
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InnoDB to shut down without
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flushing the buffer pool: this
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is equivalent to a 'crash' */
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extern "C" {
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extern ulong srv_max_buf_pool_modified_pct;
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extern ulong srv_max_purge_lag;
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extern ulong srv_auto_extend_increment;
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}
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extern TYPELIB innobase_lock_typelib;
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bool innobase_init(void);
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bool innobase_end(void);
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bool innobase_flush_logs(void);
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uint innobase_get_free_space(void);
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int innobase_commit(THD *thd, void* trx_handle);
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int innobase_report_binlog_offset_and_commit(
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THD* thd,
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void* trx_handle,
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char* log_file_name,
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my_off_t end_offset);
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int innobase_commit_complete(
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void* trx_handle);
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int innobase_rollback(THD *thd, void* trx_handle);
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int innobase_rollback_to_savepoint(
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THD* thd,
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char* savepoint_name,
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my_off_t* binlog_cache_pos);
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int innobase_savepoint(
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THD* thd,
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char* savepoint_name,
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my_off_t binlog_cache_pos);
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int innobase_close_connection(THD *thd);
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int innobase_drop_database(char *path);
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int innodb_show_status(THD* thd);
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my_bool innobase_query_caching_of_table_permitted(THD* thd, char* full_name,
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uint full_name_len);
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void innobase_release_temporary_latches(void* innobase_tid);
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void innobase_store_binlog_offset_and_flush_log(char *binlog_name,longlong offset);
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int innobase_start_trx_and_assign_read_view(THD* thd);
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