diff options
Diffstat (limited to 'include/my_base.h')
| -rw-r--r-- | include/my_base.h | 51 |
1 files changed, 42 insertions, 9 deletions
diff --git a/include/my_base.h b/include/my_base.h index c76cf8c604e..8eab79a96fd 100644 --- a/include/my_base.h +++ b/include/my_base.h @@ -248,6 +248,7 @@ enum ha_base_keytype { #define HA_OPTION_CHECKSUM 32 #define HA_OPTION_DELAY_KEY_WRITE 64 #define HA_OPTION_NO_PACK_KEYS 128 /* Reserved for MySQL */ +#define HA_OPTION_CREATE_FROM_ENGINE 256 #define HA_OPTION_TEMP_COMPRESS_RECORD ((uint) 16384) /* set by isamchk */ #define HA_OPTION_READ_ONLY_DATA ((uint) 32768) /* Set by isamchk */ @@ -258,17 +259,49 @@ enum ha_base_keytype { #define HA_CREATE_TMP_TABLE 4 #define HA_CREATE_CHECKSUM 8 #define HA_CREATE_DELAY_KEY_WRITE 64 -#define HA_CREATE_FROM_ENGINE 128 - /* Bits in flag to _status */ +/* + The following flags (OR-ed) are passed to handler::info() method. + The method copies misc handler information out of the storage engine + to data structures accessible from MySQL + + Same flags are also passed down to mi_status, myrg_status, etc. +*/ -#define HA_STATUS_POS 1 /* Return position */ -#define HA_STATUS_NO_LOCK 2 /* Don't use external lock */ -#define HA_STATUS_TIME 4 /* Return update time */ -#define HA_STATUS_CONST 8 /* Return constants values */ -#define HA_STATUS_VARIABLE 16 -#define HA_STATUS_ERRKEY 32 -#define HA_STATUS_AUTO 64 +/* this one is not used */ +#define HA_STATUS_POS 1 +/* + assuming the table keeps shared actual copy of the 'info' and + local, possibly outdated copy, the following flag means that + it should not try to get the actual data (locking the shared structure) + slightly outdated version will suffice +*/ +#define HA_STATUS_NO_LOCK 2 +/* update the time of the last modification (in handler::update_time) */ +#define HA_STATUS_TIME 4 +/* + update the 'constant' part of the info: + handler::max_data_file_length, max_index_file_length, create_time + sortkey, ref_length, block_size, data_file_name, index_file_name. + handler::table->s->keys_in_use, keys_for_keyread, rec_per_key +*/ +#define HA_STATUS_CONST 8 +/* + update the 'variable' part of the info: + handler::records, deleted, data_file_length, index_file_length, + delete_length, check_time, mean_rec_length +*/ +#define HA_STATUS_VARIABLE 16 +/* + get the information about the key that caused last duplicate value error + update handler::errkey and handler::dupp_ref + see handler::get_dup_key() +*/ +#define HA_STATUS_ERRKEY 32 +/* + update handler::auto_increment_value +*/ +#define HA_STATUS_AUTO 64 /* Errorcodes given by functions */ |