JDBC CLOB error

Question

Hi,
I face the following error, i use the oracle jdbc driver as db driver and i use the same ojdbc14.jar file as the project library, but when i try to cast the clob object return from resutlset it throw me class cast exception, i did print out the class name it shown oracle.sql.CLOB, but when i cast the object to oracle.sql.CLOB it still show me the error.
Do you have any idea what is wrong?
====================// java code
import java.sql.Clob;
import oracle.sql.CLOB;
Clob clob = null;
if ( resultSet.next() )
clob = resultSet.getClob( 1 );
logger.debug( "resultSet.getClass() is " + resultSet.getClass() );
logger.debug( "clob.getClass() is " + clob.getClass() );
logger.debug( "clob is " + clob );
logger.debug( "(clob instanceof oracle.sql.CLOB) is " + (clob instanceof oracle.sql.CLOB));
CLOB oraClob = (CLOB)clob; // this is where the class cast exception occur
====================// log file
[10/01/2005 15:51:26] b.crrs.common.CRRSParamServlet -- DEBUG -- selectUpdateStatement is [email protected]d5b222
[10/01/2005 15:51:26] b.crrs.common.CRRSParamServlet -- DEBUG -- resultSet.getClass() is class oracle.jdbc.driver.OracleResultSetImpl
[10/01/2005 15:51:26] b.crrs.common.CRRSParamServlet -- DEBUG -- clob.getClass() is class oracle.sql.CLOB
[10/01/2005 15:51:26] b.crrs.common.CRRSParamServlet -- DEBUG -- clob is oracle.sql.CLOB@1a21321
[10/01/2005 15:51:26] b.crrs.common.CRRSParamServlet -- DEBUG -- (clob instanceof oracle.sql.CLOB) is false
[10/01/2005 15:51:26] b.crrs.common.CRRSParamServlet -- DEBUG -- error
java.lang.ClassCastException

Answer 1

See JDBC error for CLOB