On 2019-01-11 11:12:25 -0500, Robert Haas wrote:
> I actually think that we should go "all in" here and allow the user to
> specify either that they want materialization or that they don't want
> materialization. If they specify neither, then we make some decision
> which we may change in a future release. If they do specify
> something, we do that.
+many