The RequestPacket class. Every request from the JDBC driver is wrapped by this class. it holds a
byte which signals the type of the request. The available types are:
TYPE_STATEMENT - a regular statement as a string TYPE_PREPARED_STATEMENT - a regular prepared
statement. a string with question marks. TYPE_PREPARED_WITH_VALUES - a prepared statement,
accompanied with an array of values TYPE_TOGGLE_AUTO_COMMIT - toggling autocommit on/off.
Version 8.0: PREPARED_VALUES_BATCH