From: | Ben Leslie <benno(at)benno(dot)id(dot)au> |
---|---|
To: | pgsql-general(at)lists(dot)postgresql(dot)org |
Subject: | Enforcing adjacent ranges |
Date: | 2017-12-07 07:42:54 |
Message-ID: | CABZ0LtDKVXS6+9LJWmK-ywcYBJ7tcBKoZVGB79S0Zp5XAntv2g@mail.gmail.com |
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Lists: | pgsql-general |
I'm wondering if there is anyway to enforce that ranges in a table be
adjacent in perhaps a similar way to enforcing that they are
non-overlapping.
Consider a (very simplified table)
CREATE TABLE (
thing_id int,
period tsrange,
EXCLUDE USING gist (thing_id WITH =, period WITH &&),
CHECK (lower_inc(period) and not upper_inc(period))
);
This should (I believe) enforce that all periods for a given thing are
non-overlapping, and that each is lower-inclusive, upper-exclusive ranges.
I'd also like to enforce that all ranges for a given 'thing' are adjacent.
Is that possible?
Thanks,
Ben
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