From: | Felipe Schnack <felipes(at)ritterdosreis(dot)br> |
---|---|
To: | Dmitry Tkach <dmitry(at)openratings(dot)com> |
Cc: | Rich Cullingford <rculling(at)sysd(dot)com>, pgsql-jdbc(at)postgresql(dot)org |
Subject: | Re: setFetchSize() |
Date: | 2003-07-17 17:19:03 |
Message-ID: | 20030717141903.2cf411e2.felipes@ritterdosreis.br |
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Thread: | |
Lists: | 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(at)openratings(dot)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(at)openratings(dot)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(at)postgresql(dot)org
> >>
> >>
> >
> >
> >
> >
>
>
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