表、索引元信息的更新
/* 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, 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
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