IBM Integration Bus - An unsupported value type ''NVARCHAR2'' was returned for column ''XXXX''.

If we have the the issue 'An unsupported value type ''NVARCHAR2'' was returned for column ''XXXX''.', we can workaround with "Java Compute" Node.

public class HTTPInputMessageFlow_JavaCompute extends MbJavaComputeNode {

public void evaluate(MbMessageAssembly inAssembly) throws MbException {
MbOutputTerminal out = getOutputTerminal("out");
MbOutputTerminal alt = getOutputTerminal("alternate");

MbMessage inMessage = inAssembly.getMessage();
MbMessageAssembly outAssembly = null;
try {
// create new message as a copy of the input
MbMessage outMessage = new MbMessage(inMessage);
outAssembly = new MbMessageAssembly(inAssembly, outMessage);
// ----------------------------------------------------------
// Add user code below
                        

// Obtain a java.sql.Connection using a JDBC Type4 datasource - in this example for a 
        // JDBC broker configurable service called "MyDB2"  

        Connection conn = getJDBCType4Connection("MyDB2",
                     JDBC_TransactionType.MB_TRANSACTION_AUTO);

        // Example of using the Connection to create a java.sql.Statement  
        Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,
                     ResultSet.CONCUR_READ_ONLY);
        ResultSet srs0 = stmt.executeQuery("SELECT NAME, CITY FROM MySchema.MyTable");    

        stmt.executeUpdate("UPDATE MySchema.MyTable SET CITY = \"Springfield\" WHERE Name = \"Bart\"");
       
        ..............
      } catch (SQLException sqx ){
        sqx.printStackTrace();
      }
// End of user code
// ----------------------------------------------------------
} catch (MbException e) {
// Re-throw to allow Broker handling of MbException
throw e;
} catch (RuntimeException e) {
// Re-throw to allow Broker handling of RuntimeException
throw e;
} catch (Exception e) {
// Consider replacing Exception with type(s) thrown by user code
// Example handling ensures all exceptions are re-thrown to be handled in the flow
throw new MbUserException(this, "evaluate()", "", "", e.toString(),
null);
}
// The following should only be changed
// if not propagating message to the 'out' terminal
out.propagate(outAssembly);

}

}

Reference: https://www.ibm.com/support/knowledgecenter/SSMKHH_9.0.0/com.ibm.etools.mft.doc/ac30494_.htm