How to use setClob method in jdbc?

Question

I need to insert a large string as clob into a table. I am using setClob method of PreparedStatement. But the values are not getting inserted into the database table. Can anyone

Answer 1

What database are you inserting the value to? For example for Oracle back-end, preparedStatement methods have 4k limitation on CLOB.

You could use:

Clob clob = ...
String chuck = clob.getSubString(1,10);
clob.setString(1,chuck);

To verify that the size is not the issue here.

Answer 2

I had the same problem using WebLogic and Oracle. I found the solution in the doc: http://docs.oracle.com/cd/B19306_01/appdev.102/b14259/xdb11jav.htm under the section "Loading a Large XML Document into the Database with JDBC"

The only problem I had with this was that the CLOB.createTemporary required an OracleConnection, but my connection object was of type $ProxyXX which I could not cast to OracleConnection without getting a ClassCastException. Solved it buy using conn.getMetaData().getConnection() that got me a T4CConnection which I could cast to OracleConnection.