Dmitry Karasik <dmi...@karasik.eu.org> writes:
> I need to have a sort of a time machine, where select statements on tables
> could be easily replaced to select statements on tables as they were some
> time in the past,
> including all related table. To do so, I used views (see in the script) that
> UNION
> both current and archive tables and filter them by a timestamp.
If you use UNION ALL instead of UNION, you should get better results
(as well as inherently cheaper queries, since no duplicate-elimination
step will be needed).
regards, tom lane
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