Example: Update CLOBs

/////////////////////////////////////////
// UpdateClobs is an example application 
// that shows some of the APIs providing
// support for changing Clob objects 
// and reflecting those changes to the 
// database.
//
// This program must be run after
// the PutGetClobs program has completed.
/////////////////////////////////////////
import java.sql.*;

public class UpdateClobs {
   public static void main(String[] args) 
   throws SQLException 
   {
       // Register the native JDBC driver.
       try {
          Class.forName("com.ibm.db2.jdbc.app.DB2Driver");
      } catch (Exception e) {
          System.exit(1);  // Setup error.
      }
          
      Connection c = DriverManager.getConnection("jdbc:db2:*local");    
      Statement s = c.createStatement();
      
      ResultSet rs = s.executeQuery("SELECT * FROM CUJOSQL.CLOBTABLE");

      rs.next();
      Clob clob1 = rs.getClob(1);
      rs.next();
      Clob clob2 = rs.getClob(1);


      // Truncate a CLOB.
      clob1.truncate((long) 150000);
      System.out.println("Clob1's new length is " + clob1.length());

      // Update a portion of the CLOB with a new String value.
      String value = "Some new data for once";
      int charsWritten = clob2.setString(500L, value);

      System.out.println("Characters written is " + charsWritten);

      // The bytes can be found at position 500 in clob2
      long startInClob2 = clob2.position(value, 1);

      System.out.println("pattern found starting at position " + startInClob2);

      c.close(); // Connection close also closes stmt and rs.
   }
}