Обсуждение: JDBC Postgres problem

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JDBC Postgres problem

От
"Tyler Hains"
Дата:

We are having a very strange issue where for certain records, queries sent via JDBC return no results when the identical query via command line or pgadmin return non-null (expected) results. Example below. We are running 8.3.9.

 

>> SELECT client_id FROM locations WHERE external_id = '278';

>> 

>> Doing an EXPLAIN ANALYZE from psql gives:

>> 

>>  Seq Scan on locations  (cost=0.00..17.01 rows=1 width=4) (actual

>> time=0.189..0.197 rows=1 loops=1)

>>    Filter: ((external_id)::text = '278'::text)  Total runtime: 0.245

>> ms

>> 

>> And doing the same thing from JDBC stmt.executeQuery() gives:

>> 

>> Seq Scan on locations  (cost=0.00..17.93 rows=1 width=4) (actual

>> time=0.206..0.206 rows=0 loops=1)

>>   Filter: ((external_id)::text = '278'::text) Total runtime: 0.221 ms

 

Note the 0 rows returned via JDBC. Has anyone ever heard of anything like this before?

 

Thanks,

Tyler Hains

IT Director

ProfitPoint, Inc.

www.profitpointinc.com

 

 

Re: JDBC Postgres problem

От
Craig Ringer
Дата:
On 9/07/2010 5:24 AM, Tyler Hains wrote:
> We are having a very strange issue where for certain records, queries
> sent via JDBC return no results when the identical query via command
> line or pgadmin return non-null (expected) results. Example below. We
> are running 8.3.9.

Can you post a compilable, self-contained Java program and a database
dump that demonstrates this problem?

You might find that, in the course of trying to simplify your current
code down to something you can publish, you discover what the issue is.
If you still have the issue with a small, simplified example then please
post it so it can be investigated.

--
Craig Ringer

Re: JDBC Postgres problem

От
"Tyler Hains"
Дата:
> We are having a very strange issue where for certain records, queries
> sent via JDBC return no results when the identical query via command
> line or pgadmin return non-null (expected) results. Example below. We
> are running 8.3.9.

We found our problem. It turned out to be a config file that was
pointing to a stale copy of the db.

Re: JDBC Postgres problem

От
Craig Ringer
Дата:
On 09/07/10 21:36, Tyler Hains wrote:
>> We are having a very strange issue where for certain records, queries
>> sent via JDBC return no results when the identical query via command
>> line or pgadmin return non-null (expected) results. Example below. We
>> are running 8.3.9.
>
> We found our problem. It turned out to be a config file that was
> pointing to a stale copy of the db.

Thanks very much for following up to the list with the resolution of
your issue.

I'm glad you found out what was going on.

--
Craig Ringer