java.sql.SQLXML interface  In JDBC 4.0, java.sql.SQLXML is the
mapping for the SQL XML data type. However, Derby defines the
XML data type and operators only in the SQL layer. There is no
JDBC-side support for the XML data type and operators  You
cannot instantiate a java.sql.SQLXML object in Derby, or bind
directly into an XML value or retrieve an XML value directly
from a result set. You must bind and retrieve the XML data as
Java strings or character streams by explicitly specifying the
XML operators, XMLPARSE and XMLSERIALIZE, as part of your SQL
queries.  Additionally, Derby does not provide JDBC metatadata
support for the XML data type.  Related reference Refined
subclasses of SQLException java.sql.Connection interface: JDBC
4.0 features java.sql.DatabaseMetaData interface: JDBC 4.0
features java.sql.Statement interface: JDBC 4.0 features
javax.sql.DataSource interface: JDBC 4.0 features