The question from my coworker was simple. Why is this happening? Because he’s selecting from the view, his instinct is that the returned result set should be filtered within the view first and that the resultset can be narrowed down further with the regular query.
It’s interesting that there’s deterministic behavior both ways. My recollection is that ANSI SQL does not honor short-circuiting, as all filters are considered to happen at the same time, and thus any ordering is valid. But in practice, there are places where different code bases end up with stable short-circuiting as an implementation detail.