"Kevin Grittner" <[EMAIL PROTECTED]> writes: > It's been a while since I looked at it, but my recollection is that > much of the standard date/time math which people assert can't handle > practical use cases do work if the timestamps and times WITH TIME > ZONE have a time zone in the offset-from-UTC format.
Certainly --- as long as you are considering a fixed UTC offset, the standard does what it claims to. The knock on it is that in the real world people want sane behavior with real-world timezone definitions that have non-constant UTC offsets. As an example, timestamptz '2007-01-01 00:00 -05' + interval '6 months' must yield 2007-07-01 00:00 -05 according to the spec, AFAICS; but most people living in the EST5EDT zone would prefer to get midnight -04. There are probably some folk in South America who'd prefer midnight -06. (Looks at a map ... hm, maybe not, but certainly Europe vs Africa would produce some such examples.) regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match