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Posted to derby-user@db.apache.org by Kristian Waagan <Kr...@Sun.COM> on 2009/01/08 17:04:31 UTC
Re: how to get data out from Clob?
Mikael Sundberg wrote:
> Thanks for the info
> Does the same problem exist for Blob?
> Will update my testservers and try it.
Hi Mikael,
Did you get around to update your test servers?
If so, did you see a performance improvement you use cases?
Regards,
--
Kristian
>
> -----Original Message-----
> From: Kristian.Waagan@Sun.COM [mailto:Kristian.Waagan@Sun.COM]
> Sent: den 25 november 2008 14:01
> To: Derby Discussion
> Subject: Re: how to get data out from Clob?
>
> Mikael Sundberg wrote:
>> Hi
>> Im using derby 10.4.2 and the clientdriver.
>> I changed from
>> BufferedReader r = new BufferedReader(new
>> InputStreamReader(res.getAsciiStream("data")));
>> for (String line = r.readLine(); line != null; line =
>> r.readLine())
>> {
>> w.println(line);
>> }
>>
>> To
>> String data = res.getString("data");
>>
>> In a recent update to our application since the getString seemed to be
>> twice as fast then. Not entirely sure what versions of derby I tested
> on
>> then.
>> So bacisly I should change back now?
>
> On the client driver, it doesn't matter (with respect to the bug I'm
> talking about). I'm afraid you're stuck with the performance problem
> until you upgrade to a newer version.
>
>> We don't want to use any unstable
>> version on production so guess I will have to solve it some other way.
>
>> Il atleast try out the latest version on my testservers to see if that
>> realy is the problem.
>>
>
> I would consider using the newest bits from the 10.4 branch. The changes
>
> after the latest release are bug fixes, not new features.
> You can download test binaries from here
> http://dbtg.thresher.com/derby/bits/
> Note that these are bits used for the nightly testing and should *not*
> be used in production without verification and testing.
>
> Note that the performance problem in this case is severe; the larger the
>
> Clob the worse the impact (we're talking hours instead of
> seconds/minutes). I would strongly suggest you test with a newer, though
>
> unreleased, version.
>
>