On 1/20/2011 1:03 PM, Pavel Bortnovskiy wrote:
the more I am working through this issue, the more I get convinced
that it's a Derby issue.
When the select statement is modified slightly (not using joining of
tables on themselves, but rather using IN), then everything works
without a hiccup:
SELECT
P1.ID ,
R1.description
P1.BOOK
P1.NOMINAL
P1.NOMINAL * R1.Factor
FROM
P_TABLE P1,
R_TABLE R1
WHERE
P1.IN_ID = R1.IN_ID AND
R1.IN_ID in (
select
R2.IN_ID
from
P_TABLE P2,
R_TABLE R2
where
P2.IN_ID = R2.IN_ID AND
P2.NOMINAL <> 0 AND
R2.IType='X'
GROUP BY R2.IN_ID
HAVING COUNT(*) >1
)
So, this leads me to believe that SELECT statements such as this
causes a problem within Derby:
select
*
from
*TABLE* T1,
(
select <field> from *TABLE* T2
) as M
where
M.<field> = T1.<field>
I think it would be worthwile to file an issue in Jira while you work to
get a reproduction that the community can work with. Put as much
information as you can in the Jira issue especially useful would be a
thread dump even if the proprietary parts are edited out. You might
also want to set lock timeout and deadlock timeout low [1] so that you
don't have to wait for those errors if they are occurring.
Generally the more information you can provide the better the community
will be able to help. As for it being urgent, once you get a
reproduction and confirm it as a Derby issue, I think that you will find
the development community very supportive if you want to try to fix it
yourself.
Thanks
Kathey
[1] http://db.apache.org/derby/docs/10.7/devguide/cdevconcepts16400.html
