Problem with JDBC

Question

Hi, sorry but in other forum nobody answer my question.
the probles is using JDBC 2.0, my cod is:
Statement c = conn.createStatement();
Statement =conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
ResultSet rest = n.executeQuery("select * from t_prueba");
rest.last();
rest.updateBlob("C", null);
rest.updateRow();
rest.close();c.close();conn.close();
at time to execute this code, i have this error:
java.sql.SQLException: Operaci�n no v�lida para el juego de resultados de s�lo lectura: updateBlob
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:124)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:161)
at oracle.jdbc.driver.BaseResultSet.updateBlob(BaseResultSet.java:482)
at oracle.jdbc.driver.OracleResultSet.updateBlob(OracleResultSet.java:1230)
at mypackage3.Conversor.leerImagenBase64(Conversor.java:51)
at mypackage3.Conversor.main(Conversor.java:77)
why is this problem if i using ResultSet.CONCUR_UPDATABLE in my statement.
i 'm using jdeveloper 10.1.2 whith j2se 1.4.2_04
please anyone can help me please
tanks
alex

Answer 1

There are numerous problems with what you posted.
1) Do you mean to use updateNull and not what you are doing?
2) As mentioned why would you not do this in an UPDATE query? Even if you get this to work arbitrary moving around in a result set that you don't even need along with bad practices like SELECT * is just bad all around.
3) Further as mentioned what you are trying to do is not supported (obviously) by your driver/database etc. Just because you ASK for a scrollable updatable cursor does not mean that you get one. You ask for one but obviously that error message says that the cursor is read only. For the benefits of others it says (more or less) "invalid operation on read only result set : updateBlob"
Possibly you will have to use a forward only cursor to make it updateable... I don't know consult the Oracle docs. Or better yet don't do it this way.