By default, data type objects for Array, Blob, Clob, NClob, Ref, SQLXML, and Struct, plus ParameterMetaData and ResultSetMetaData objects are wrapped with a WebLogic wrapper. You can disable wrapping which can improve performance and allow applications to use native driver objects directly. See Using Unwrapped Data Type Objects.
To disable wrapping of JDBC data type objects:
After you finish
Redeploy the data source or restart the server.