"Ed L." <pgsql(at)bluepolka(dot)net> writes:
> On Friday April 4 2003 1:42, Jonathan Bartlett wrote:
>> I have a view that is based on several UNION clauses. I'm wondering, if
>> I select data from there, will it UNION first, and then apply my where
>> clauses, or can it factor my where clauses through the UNION? If it
>> doesn't do it automatically, is there any way to automate it?
> For cases like this, you can usually construct a very simple test to get the
> answer.
A test case would tell him what the version he tests does. It would not
likely inform him that 7.3 will push down such conditions but prior
versions don't ...
regards, tom lane