2009/12/18 Robert Haas <robertmhaas@gmail.com>:
> 2009/12/18 Grzegorz Jaśkiewicz <gryzman@gmail.com>:
>> On Fri, Dec 18, 2009 at 2:18 PM, Robert Haas <robertmhaas@gmail.com> wrote:
>>
>>> NOT IN is the only that really kills you as far as optimization is
>>> concerned. IN can be transformed to a join. NOT IN forces a NOT
>>> (subplan)-type plan, which bites - hard.
>>
>> in a well designed database (read: not abusing NULLs) - it can be done
>> with joins too.
>
> But not by PostgreSQL, or so I believe.
using left join ?
--
GJ
