On Tue, Nov 20, 2012 at 9:10 AM, Claudio Freire <klaussfreire@gmail.com> wrote:
> On Tue, Nov 20, 2012 at 12:04 PM, Merlin Moncure <mmoncure@gmail.com> wrote:
>> The problem here is very clear. Oracle is optimizing through the CTE.
>> PostgreSQL does not do this by design -- CTE's are used as a forced
>> materialization step.
>
> While I love that design (it lets me solve lots of problems for huge
> queries), wouldn't pushing constraints into the CTE be a rather safe
> optimization?
sure, or rewrite query as classic join.
merlin
