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/* Copyright (C) 2000-2005 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; version 2 of the License.
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;
struct row_prebuilt_struct;
typedef struct row_prebuilt_struct row_prebuilt_t;
/* The class defining a handle to an Innodb table */
class ha_innobase: public handler
{
row_prebuilt_t* prebuilt; /* prebuilt struct in InnoDB, used
to save CPU time with prebuilt data
structures*/
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;
uchar* upd_buff; /* buffer used in updates */
uchar* 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;
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 */
uint store_key_val_for_row(uint keynr, char* buff, uint buff_len,
const uchar* record);
int update_thd(THD* thd);
int change_active_index(uint keynr);
int general_fetch(uchar* buf, uint direction, uint match_mode);
int innobase_read_and_init_auto_inc(longlong* ret);
/* Init values for the class: */
public:
ha_innobase(handlerton *hton, TABLE_SHARE *table_arg);
~ha_innobase() {}
/*
Get the row type from the storage engine. If this method returns
ROW_TYPE_NOT_USED, the information in HA_CREATE_INFO should be used.
*/
enum row_type get_row_type() const;
const char* table_type() const { return("InnoDB");}
const char *index_type(uint key_number) { return "BTREE"; }
const char** bas_ext() const;
ulonglong 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;
const key_map *keys_to_use_for_scanning() { return &key_map_full; }
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(uchar * buf);
int update_row(const uchar * old_data, uchar * new_data);
int delete_row(const uchar * buf);
bool was_semi_consistent_read();
void try_semi_consistent_read(bool yes);
void unlock_row();
int index_init(uint index, bool sorted);
int index_end();
int index_read(uchar * buf, const uchar * key,
uint key_len, enum ha_rkey_function find_flag);
int index_read_idx(uchar * buf, uint index, const uchar * key,
uint key_len, enum ha_rkey_function find_flag);
int index_read_last(uchar * buf, const uchar * key, uint key_len);
int index_next(uchar * buf);
int index_next_same(uchar * buf, const uchar *key, uint keylen);
int index_prev(uchar * buf);
int index_first(uchar * buf);
int index_last(uchar * buf);
int rnd_init(bool scan);
int rnd_end();
int rnd_next(uchar *buf);
int rnd_pos(uchar * buf, uchar *pos);
void position(const uchar *record);
int 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 reset();
int external_lock(THD *thd, int lock_type);
int transactional_table_lock(THD *thd, int lock_type);
int start_stmt(THD *thd, thr_lock_type lock_type);
void position(uchar *record);
ha_rows records_in_range(uint inx, key_range *min_key, key_range
*max_key);
ha_rows estimate_rows_upper_bound();
void update_create_info(HA_CREATE_INFO* create_info);
int create(const char *name, register TABLE *form,
HA_CREATE_INFO *create_info);
int delete_all_rows();
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();
int get_foreign_key_list(THD *thd, List<FOREIGN_KEY_INFO> *f_key_list);
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();
virtual void get_auto_increment(ulonglong offset, ulonglong increment,
ulonglong nb_desired_values,
ulonglong *first_value,
ulonglong *nb_reserved_values);
int reset_auto_increment(ulonglong value);
virtual bool get_error_message(int error, String *buf);
uint8 table_cache_type() { return HA_CACHE_TBL_ASKTRANSACT; }
/*
ask handler about permission to cache table during query registration
*/
my_bool register_query_cache_table(THD *thd, char *table_key,
uint key_length,
qc_engine_callback *call_back,
ulonglong *engine_data);
static char *get_mysql_bin_log_name();
static ulonglong get_mysql_bin_log_pos();
bool primary_key_is_clustered() { return true; }
int cmp_ref(const uchar *ref1, const uchar *ref2);
bool check_if_incompatible_data(HA_CREATE_INFO *info,
uint table_changes);
};
extern ulong innobase_fast_shutdown;
extern ulong innobase_large_page_size;
extern long innobase_mirrored_log_groups, innobase_log_files_in_group;
extern longlong innobase_buffer_pool_size, innobase_log_file_size;
extern long innobase_log_buffer_size;
extern long 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;
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_doublewrite,
innobase_use_checksums,
innobase_use_large_pages,
innobase_use_native_aio,
innobase_file_per_table, innobase_locks_unsafe_for_binlog,
innobase_rollback_on_timeout,
innobase_create_status_file,
innobase_stats_on_metadata;
extern "C" {
extern ulong srv_max_buf_pool_modified_pct;
extern ulong srv_max_purge_lag;
extern ulong srv_auto_extend_increment;
extern ulong srv_n_spin_wait_rounds;
extern ulong srv_n_free_tickets_to_enter;
extern ulong srv_thread_sleep_delay;
extern ulong srv_thread_concurrency;
extern ulong srv_commit_concurrency;
extern ulong srv_flush_log_at_trx_commit;
}
/*
don't delete it - it may be re-enabled later
as an optimization for the most common case InnoDB+binlog
*/
#if 0
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);
void innobase_store_binlog_offset_and_flush_log(char *binlog_name,longlong offset);
#endif
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