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/* 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 __GNUC__
#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 active_index_before_scan;
/* since a table scan in InnoDB is
always done through an index, a table
scan may change active_index; but
MySQL may assume that active_index
after a table scan is the same as
before; we store the value here so
that we can restore the value after
a scan */
uint last_match_mode;/* match mode of the latest search:
ROW_SEL_EXACT, ROW_SEL_EXACT_PREFIX,
or undefined */
longlong auto_inc_counter_for_this_stat;
ulong max_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_KEYPOS_TO_RNDPOS |
HA_LASTKEY_ORDER |
HA_NULL_KEY |
HA_BLOB_KEY |
HA_CAN_SQL_HANDLER |
HA_NOT_EXACT_COUNT |
HA_NO_WRITE_DELAYED |
HA_PRIMARY_KEY_IN_READ_INDEX |
HA_DROP_BEFORE_CREATE |
HA_TABLE_SCAN_ON_INDEX),
last_dup_key((uint) -1),
start_of_scan(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) const
{
return (HA_READ_NEXT | HA_READ_PREV | HA_READ_ORDER |
HA_KEY_READ_ONLY);
}
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; }
/* 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_key_length() const { return((MAX_KEY_LENGTH <= 3500) ?
MAX_KEY_LENGTH : 3500);}
bool fast_key_read() { return 1;}
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);
void initialize(void);
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=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 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(void);
int external_lock(THD *thd, int lock_type);
int start_stmt(THD *thd);
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);
ha_rows estimate_number_of_rows();
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();
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; }
bool primary_key_is_clustered() { return true; }
};
extern bool innodb_skip;
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;
extern "C" {
extern ulong srv_max_buf_pool_modified_pct;
}
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);
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