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?