I'd like to limit a 9.2 tstzrange to valid dates at both ends.
No NULLs nor 'infinity'.
Various revisions of this SQL isn't constraining '-/+infinity' input:
CREATE TABLE bill
( id serial NOT NULL, created_at timestamp with time zone NOT NULL DEFAULT now(), period tstzrange NOT NULL, -- other
columnsCONSTRAINT bill_pk PRIMARY KEY (id), CONSTRAINT bill_period_lower_not_null_ck CHECK (lower(period) IS NOT NULL),
CONSTRAINTbill_period_upper_not_null_ck CHECK (upper(period) IS NOT NULL), CONSTRAINT bill_period_lower_not_infinity_ck
CHECK(lower_inf(period) IS FALSE), CONSTRAINT bill_period_upper_not_infinity_ck CHECK (upper_inf(period) IS FALSE)
);
INSERT INTO bill (period) VALUES (tstzrange (NULL, NULL));
INSERT INTO bill (period) VALUES (tstzrange ('2000-05-10', '2015-02-22');
INSERT INTO bill (period) VALUES (tstzrange ('2000-05-10', now());
INSERT INTO bill (period) VALUES (tstzrange ('infinity', now());
INSERT INTO bill (period) VALUES (tstzrange ('-infinity', now());
INSERT INTO bill (period) VALUES (tstzrange (now(), 'infinity');
psql (9.2.3)
Type "help" for help.
test_1=> SELECT id, period FROM bill;id | period
----+------------------------------------------------------------ 1 | ["2000-05-10 00:00:00+01","2015-02-22
00:00:00+00")2 | ["2000-05-10 00:00:00+01","2013-10-16 13:20:01.793803+01") 4 | [-infinity,"2013-10-16
13:20:18.993038+01")5 | ["2013-10-16 13:21:14.208279+01",infinity)
(4 rows)
Changing the *_inf(period) IS FALSE checks to TRUE rejects valid dates.
Range functions in the manual: http://www.postgresql.org/docs/9.2/static/functions-range.html
Thoughts?
--
Craig Skinner | http://twitter.com/Craig_Skinner | http://linkd.in/yGqkv7