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select 1p + 2p, +(1p), -(1p), 1p - 2p, 3p * 4p, 7p / 4p, 7p % 4p, "a"p || "b"p,
pgdate('2001-09-28')+7,
pgdate('2001-09-28') + pginterval('1 hour'),
pgdate('2001-09-28') + pgtime('03:00'),
pginterval('1 day') + pginterval('1 hour'),
pgtimestamp('2001-09-28 01:00') + pginterval('23 hours'),
pgtime('01:00') + pginterval('3 hours'),
-pginterval('23 hours'),
pgdate('2001-10-01') - pgdate('2001-09-28'),
pgdate('2001-10-01') - 7,
pgdate('2001-09-28') - pginterval('1 hour'),
pgtime('05:00') - pgtime('03:00'),
pgtime('05:00') - pginterval('2 hours'),
pgtimestamp('2001-09-28 23:00') - pginterval('23 hours'),
pginterval('1 day') - pginterval('1 hour'),
pgtimestamp('2001-09-29 03:00') - pgtimestamp('2001-07-27 12:00'),
pginterval('1 second') * 900.0,
pginterval('1 hour') / 1.5;
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