XMLType setNull(nnn, Types.NULL) doesn't work in a ps.executeBatch()

Question

All,
Sorry below was originally posted in another OTN forum ( XMLType setNull(nnn, Types.NULL) doesn't work in a ps.batchUpdate() ) and I feel that it maybe more relevant here, so if you have already read it... my apologies:
A little background: Java version 1.5.0.08 on Solaris 10 with Oracle 10g R2. The XMLDB is using the Object Relational setup with a large XSD being shredded, the schema in question has three XMLType columns two of which are nullable, but all reference the same XSD. Everything i reference below will be in Java code that compiles(all of the time) and runs (most of time depending on which code is implemented). To my knowledge no patches were applied to the DB server when it suddenly stopped working.
Until recently the setNull (using java.sql.Types.NULL for the data type) was working in a batch update (ps.updateBatch()) . Now we get the following stack trace:
java.lang.NullPointerException
at oracle.jdbc.driver.T4CTTIoac.init(T4CTTIoac.java:354)
at oracle.jdbc.driver.T4C8Oall.initBindsDefinition(T4C8Oall.java:1217)
at oracle.jdbc.driver.T4C8Oall.marshal(T4C8Oall.java:372)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:202)
at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:955)
at oracle.jdbc.driver.OraclePreparedStatement.executeBatch(OraclePreparedStatement.java:10620)
Interestingly enough we can execute the same code but only changing the executeBatch to be ps.executeUpdate(). I know that executeBatch() works as we have other tables being inserted into using XMLTypes with no problem, however none of the columns are nullable. I'm not sure if this is a configuration issue that has been introduced while trying to increase/tweak insert performance (on the DB server), or if something else altogether. Does anyone have any insight into this?
Regards,
Stefan

Answer 1

Does something like this help
     while (resultSet.next())
        xml = (XMLType) resultSet.getObject(1);
        Reader reader = new InputStreamReader(xml.getInputStream());
        FileOutputStream fos = new FileOutputStream("c:\\temp\\output.xml");
        Writer writer = new OutputStreamWriter(fos);
        int n;
        char[] buffer = new char[CLOB.MAX_CHUNK_SIZE];
        while (-1 != (n = reader.read(buffer)))
          writer.write(buffer,0,n);
        writer.flush();
        fos.close();
        xml.close();
       resultSet.close();
       statement.close();
       getConnection().close();