OracleCachedRowSet error: The RowSet is not write enabled

Question

Hello,
I'm trying to used OracleCachedRowSet class from the ocrs12.jar (Oracle 9.2 Client) with an Oracle 9i Database.
When I try to insert a new row in the row set I get the error message "The RowSet is not write enabled, SQL State: null". I don't know what I have to do to write enable the row set. I think I do the same as described in Appendix A of the Manual JDBC Developer's Guide and Reference. I also tried to set the concurrency to ResultSet.CONCUR_UPDATABLE. Unfortunately I didn't find the JavaDoc API documentation of this class. It is not included in the Oracle/JDBC documentation.
The code looks like this:
OracleCachedRowSet rowSet = new OracleCachedRowSet ();
rowSet.setUrl("jdbc:oracle:oci:@MYDB");
rowSet.setUsername("MYDB");
rowSet.setPassword("MYPWD");
rowSet.setCommand(sqlStatement);
rowSet.setType(ResultSet.TYPE_SCROLL_INSENSITIVE);
rowSet.setConcurrency(ResultSet.CONCUR_UPDATABLE);
rowSet.execute();
System.out.println ("--- Row set after first select ---");
printResultSet (rowSet);
rowSet.moveToInsertRow ();
rowSet.updateString ("KUNDENID","4711");
rowSet.updateString ("VORNAME","Fred");
rowSet.updateString ("NACHNAME","Mayr");
rowSet.insertRow();
The row set contains the right data after the select statement is executed!
What is wrong? Where do I find the API documentation?
Thomas Mayr

Answer 1

Hello Avi,
thanks for your reply (even if it's nor vey helpful). I read off course the general description of the standard Java interface CachedRowSet (which is implemented by OracleCachedRowSet). I also implemented the scenario with Sun's reference implementation CachedRowSetImpl. This works by the way with this code fragment (however this implementation has other bugs). I think each implementation needs a certain set of properties which are be defined by the interface? The SQL statement executed is set by the method setCommand() and the statement string is "SELECT KUNDENID,NACHNAME,VORNAME FROM JDBCTEST" (sorry this is missing in the code fragment). The row set is also populated with the content of the table, so the statement execution works. I also tried to populate the row set with a result set created by a prepared statement. But the error message when updating the row set is the same. The code looks like this:
PreparedStatement ps = dbConnection.prepareStatement(sqlStatement,
ResultSet.TYPE_SCROLL_INSENSITIVE,
ResultSet.CONCUR_UPDATABLE);
ResultSet resultSet = ps.executeQuery ();
rowSet.populate (resultSet);
Note that the code fragment is not part of a productive code. It is a test case for row sets which I like to use in a productive code in a completly different scenario. Explicit insert, update or delete statements are not an alternative!