Re: Driver compatibility with 7.3 server

Thank you for the feedback.  I was finally able to get this working
successfully using the 7.4 JDBC driver with the 7.3 server.  The tricky
part I found out was that you have to set autocommit off
(Connection.setAutoCommit(false)).  Once I did so, my memory usage went
down drastically!


Mike

Oliver Jowett wrote:
> Mike Charnoky wrote:
>
>> Hi everyone, happy holidays!  We are are currently using Postgresql 7.3
>> and would like to be able to use cursors for large selects (ie: using
>> Statement.setFetchSize()).  Unfortunately, this is not implemented in
>> the 7.3 JDBC driver.  Is it possible to use a newer version of the JDBC
>> driver, say 7.4, with the 7.3 version of the db server?  Thanks.
>
>
> Later driver versions should work fine with a 7.3 server .. but ..
>
> The setFetchSize() / cursor support in recent drivers (8.0 or later)
> only turns on if the v3 wire protocol is being used. 7.3 servers don't
> support v3, so it's not going to help your particular case.
>
> For a while, the driver would rewrite queries to use DECLARE rather than
> using the v3 protocol facilities, which also works under v2 (but is
> somewhat more fragile). IIRC, this was done in the 7.4 series. So you
> could try an older, 7.4-era, driver and it might do the trick.
>
> -O