Re: setFetchSize() - Mailing list pgsql-jdbc

From Felipe Schnack
Subject Re: setFetchSize()
Date
Msg-id 20030717141903.2cf411e2.felipes@ritterdosreis.br
Whole thread Raw
In response to Re: setFetchSize()  (Dmitry Tkach <dmitry@openratings.com>)
Responses Re: setFetchSize()  (Dmitry Tkach <dmitry@openratings.com>)
List pgsql-jdbc
  but I said I can't understand it when autocommit is off, not when it's on...

On Thu, 17 Jul 2003 13:16:15 -0400
Dmitry Tkach <dmitry@openratings.com> wrote:

> Felipe Schnack wrote:
>
> >  Seems to me like a quite good solution! But why this is needed when autocommit is off? I can't understand.
> >
> >
> Because you can only have cursors declared inside a transaction :-(
>
> Dima
>
> >On Thu, 17 Jul 2003 13:01:43 -0400
> >Dmitry Tkach <dmitry@openratings.com> wrote:
> >
> >
> >
> >>Rich Cullingford wrote:
> >>
> >>
> >>
> >>>All,
> >>>Will this function be implemented in Release 7.4? I have several arge
> >>>tables that run Java out of memory when I attempt to load them through
> >>>JDBC. Any workarounds arppreciated...
> >>>
> >>>
> >>I was using cursors for a while as a workaround...
> >>Something like this:
> >>
> >>c.setAutocommit (false);
> >>Statement s = c.createStatement ();
> >>s.execute ("declare foo cursor for select * from bar");
> >>
> >>while (true)
> >>{
> >>    ResultSet rs = s.executeQuery ("fetch 10 from foo");
> >>    int count = 0;
> >>    while (rs.next ())
> >>    {
> >>        count++;
> >>        doStuffWithThisRow (rs);
> >>     }
> >>
> >>     if (count < 10) //The whole cursor contents has been processed
> >>          break;
> >>}
> >>
> >>
> >>I hope, it helps...
> >>
> >>Dima
> >>
> >>
> >>
> >>---------------------------(end of broadcast)---------------------------
> >>TIP 1: subscribe and unsubscribe commands go to majordomo@postgresql.org
> >>
> >>
> >
> >
> >
> >
>
>


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