On Fri, Aug 26, 2005 at 16:14:18 -0400,
Chris Hoover <> wrote:
> Hopefully a quick question.
> In 7.3.4, how does the planner execute a query with union alls in it?
> Does it execute the unions serially, or does it launch a "thread" for
> each union (or maybe something else entirely).
Postgres doesn't have parallel execution of parts of queries. So it is
going to do one part followed by the other part.