Re: bug in jdbc

----- "Oliver Jowett" <oliver@opencloud.com> wrote:

> On 4 September 2011 05:16,  <luvar@plaintext.sk> wrote:
> > Hi, I have executed some update query and I have requested to return
> generated id...
> >
> > statement.executeUpdate(query, Statement.RETURN_GENERATED_KEYS);
> > ResultSet ids  = statement.getGeneratedKeys();
> > ids.next();
> > ids.getInt(1);
> >
> > It will fail with this exception:
> >
> > 19:03:50,300         WARN ObjectBrowser:254 - Bad value for type int
> : /home/luvar/output.svg
> > org.postgresql.util.PSQLException: Bad value for type int :
> /home/luvar/output.svg
> >        at
> org.postgresql.jdbc2.AbstractJdbc2ResultSet.toInt(AbstractJdbc2ResultSet.java:2759)
> >        at
> org.postgresql.jdbc2.AbstractJdbc2ResultSet.getInt(AbstractJdbc2ResultSet.java:2003)
>
> Javadoc for getGeneratedKeys says:
>
> Note:If the columns which represent the auto-generated keys were not
> specified, the JDBC driver implementation will determine the columns
> which best represent the auto-generated keys.
>
> So you shouldn't expect a particular set of returned columns unless
> you explicitly specify which columns to return. (In this particular
> case the driver is playing it safe and returning *all* columns as it
> doesn't know which ones could be affected by triggers etc)
> You could look up the column you want by name rather than by index,
> or
> use the overloaded variant of executeUpdate() that takes a list of
> column names.

Many thanks for clarification. So this behavior is in line with specification.

To be accurate, I should call something like:
statement.executeUpdate(query, new String[] {"id"});
instead of:
statement.executeUpdate(query, Statement.RETURN_GENERATED_KEYS);
to get only autogenerated (in my case "id") column. Please correct me, If I am wrong.

>
> Oliver