On 25 Aug 2004, Greg Stark wrote:
> It's only allowed when the transaction is in READ UNCOMMITTED isolation level.
> Something Postgres doesn't currently support. In fact I'm not aware of any SQL
> database that supports it, though I'm sure there's one somewhere.
Looks like mysql also supports it:
http://dev.mysql.com/doc/mysql/en/InnoDB_transaction_isolation.html
Together with the other replies we now have a whole bunch of databases
that implements it.
--
/Dennis Björklund