Which two statements are true regarding partitioning in Mysql?（）

• A、Tables with BLOB and TEXT columns cannot be partitioned
• B、Partitioning allows easier management of smaller data sets for certain queries
• C、Partitioning allows different columns to be stored in separate files
• D、The partitioning expression is an integer or function that returns an integer value or NULL value
• E、Partitioning is only available for those storage engines that implements it natively