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From "Kevin Sutter (JIRA)" <j...@apache.org>
Subject [jira] Commented: (OPENJPA-63) Better pessimistic lock support for DB2 v8.2+
Date Thu, 09 Nov 2006 20:48:37 GMT
    [ http://issues.apache.org/jira/browse/OPENJPA-63?page=comments#action_12448584 ] 
            
Kevin Sutter commented on OPENJPA-63:
-------------------------------------

Thanks, Igor, for your comments.  I agree with you (and Patrick) that a general case solution
is better than nothing at this point.  If you can provide an updated patch, I will take another
look at it and get it committed.  Thanks.

One question though...  In your first bullet reply, you said that you would change the lock
clause to "..UPDATE LOCKS".  But, in your "solid generic clause" reply, you said "..EXCLUSIVE
LOCKS".  I'm pretty sure that was just a copy-and-paste error, but I wanted to double check
that you were going to use "..UPDATE LOCKS".

Thanks,
Kevin

> Better pessimistic lock support for DB2 v8.2+
> ---------------------------------------------
>
>                 Key: OPENJPA-63
>                 URL: http://issues.apache.org/jira/browse/OPENJPA-63
>             Project: OpenJPA
>          Issue Type: Improvement
>          Components: jdbc
>         Environment: IBM DB2 UDB v8.2 or later
>            Reporter: Igor Fedorenko
>         Attachments: db2-selectForUpdate.patch
>
>
> There is new SELECT "FOR READ ONLY WITH RS USE AND KEEP EXCLUSIVE LOCKS" syntax in DB2
v8.2 and later that can be used to implement pessimistic locks for selects with multiple from
tables, subselects, inner/outer joins and so forth. I'll attach simple patch shortly.

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