On Wed, Mar 01, 2006 at 12:59:29PM -0500, Bruce Momjian wrote: > Good question. Should we restrict days to 0 - 30 or -30 - 30? The > current system does the later: > > test=> select justify_days('-45 days'); > justify_days > ------------------ > -1 mons -15 days > (1 row) > > test=> select justify_days('1 month -45 days'); > justify_days > -------------- > -15 days > (1 row) > > test=> select justify_days('1 month -15 days'); > justify_days > ---------------- > 1 mon -15 days > (1 row) > > Should we be adjusting the last one? I am unsure. Comments?
ISTM it should be looking at the sign of the overall interval, and sticking with that consistently. So while '1 mon 5 days' and '-3 mon -8 days' both make sense, '1 mon -2 days' doesn't make nearly as much sense in the general case. Of course this is complicated by the fact that '1 mon 20 days' doesn't necessarily equate to '2 mon -10 days'... :( One of these days we should just create a new calendar. ;) -- Jim C. Nasby, Sr. Engineering Consultant [EMAIL PROTECTED] Pervasive Software http://pervasive.com work: 512-231-6117 vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461 ---------------------------(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