"Gordon A. Runkle" <gar@integrated-dynamics.com> writes:
> I have a number of views that I'm bringing over from DB2 which
> have UNIONs in them. Some of the UNIONs have joins.
> The views are not working as expected (I'm running 7.1RC2).
> It appears that the where clause being applied to the view
> by the user is not being distributed properly to the selects.
You're correct, an outer WHERE clause will not be pushed down into
the member selects of a UNION. (This hasn't really got anything
to do with whether a VIEW is involved.) I haven't gotten round to
convincing myself about whether that transformation is always valid,
or what conditions it needs to be valid. A TODO item for some
future release...
regards, tom lane
