/* 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;} key_map keys_to_use_for_scanning() { return ~(key_map) 0; } 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 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(); 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(); }; 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_file_io_threads, innobase_lock_wait_timeout; extern long innobase_force_recovery, innobase_thread_concurrency; 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_create_status_file; 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);