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# Classroom Scheduling test
#
# Ensure that the classroom is not scheduled more than once
# for any moment in time.
#
# Any overlap between the transactions must cause a serialization failure.
setup
{
CREATE TABLE room_reservation (room_id text NOT NULL, start_time timestamp with time zone NOT NULL, end_time timestamp with time zone NOT NULL, description text NOT NULL, CONSTRAINT room_reservation_pkey PRIMARY KEY (room_id, start_time));
INSERT INTO room_reservation VALUES ('101', TIMESTAMP WITH TIME ZONE '2010-04-01 10:00', TIMESTAMP WITH TIME ZONE '2010-04-01 11:00', 'Bob');
}
teardown
{
DROP TABLE room_reservation;
}
session s1
setup { BEGIN ISOLATION LEVEL SERIALIZABLE; }
step rx1 { SELECT count(*) FROM room_reservation WHERE room_id = '101' AND start_time < TIMESTAMP WITH TIME ZONE '2010-04-01 14:00' AND end_time > TIMESTAMP WITH TIME ZONE '2010-04-01 13:00'; }
step wy1 { INSERT INTO room_reservation VALUES ('101', TIMESTAMP WITH TIME ZONE '2010-04-01 13:00', TIMESTAMP WITH TIME ZONE '2010-04-01 14:00', 'Carol'); }
step c1 { COMMIT; }
session s2
setup { BEGIN ISOLATION LEVEL SERIALIZABLE; }
step ry2 { SELECT count(*) FROM room_reservation WHERE room_id = '101' AND start_time < TIMESTAMP WITH TIME ZONE '2010-04-01 14:30' AND end_time > TIMESTAMP WITH TIME ZONE '2010-04-01 13:30'; }
step wx2 { UPDATE room_reservation SET start_time = TIMESTAMP WITH TIME ZONE '2010-04-01 13:30', end_time = TIMESTAMP WITH TIME ZONE '2010-04-01 14:30' WHERE room_id = '101' AND start_time = TIMESTAMP WITH TIME ZONE '2010-04-01 10:00'; }
step c2 { COMMIT; }
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