On Apr 28, 2:00 am, pate...@patearl.net (Patrick Earl) wrote:
> This is a follow-up to an old message by Tom Lane:
>
> http://archives.postgresql.org/pgsql-sql/2006-10/msg00080.php
>
[...]
>
> select * from Pet
> left join Dog on Dog.Id = Pet.Id
> left join Cat on Cat.Id = Pet.Id
>
> Now suppose you want to lock to ensure that your Cat is not updated
> concurrently. You add FOR UPDATE, but then PostgreSQL gets upset and
> complains that locking on the nullable side of an outer join is not
> allowed.
>
Any resolve to or update on this issue?
Thanks,
greg.fenton
--
greg dot fenton at gmail (yes, dot com)