From: | Gio - <gio-force(dot)2(dot)1(at)hotmail(dot)com> |
---|---|
To: | "pgsql-novice(at)postgresql(dot)org" <pgsql-novice(at)postgresql(dot)org> |
Subject: | OVERLAPS constraint using TIME columns |
Date: | 2018-02-21 21:21:27 |
Message-ID: | VI1PR05MB158277FA71F6EAD5071154D2FDCE0@VI1PR05MB1582.eurprd05.prod.outlook.com |
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Lists: | pgsql-novice |
Hi all,
I have a table for weekly time slots with columns day, from, to.
I would like to add a constraint so that overlapping time slots cannot be added to the db.
The OVERLAPS operator works as I need to, eg
SELECT (TIME ‘5:00', TIME '10:00') OVERLAPS (TIME '22:59', TIME '23:10');
But I can’t use it inside a constraint (ERROR: syntax error near “,”)
ALTER TABLE slots
ADD CONSTRAINT same_day_slots_overlap
EXCLUDE USING GIST
(
day WITH =,
(from, to) WITH OVERLAPS
);
Same error happens if I use the && operator.
I only need time information in my columns so I can either model them as TIME or INTEGER (as minutes from the start of the day). How can I add
such a constraint with these columns?
Thank you very much,
George
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