-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 11/23/07 03:33, Peter Childs wrote: > > > On 21/11/2007, *Sascha Bohnenkamp* <asbohnenkamp@xxxxxx > <mailto:asbohnenkamp@xxxxxx>> wrote: > > > Fie on you evil synthetic key lovers. Long live the Natural Key! > > think of an foreign key referencing a primary key with 6 columns *urgs* > never! > > > > The worse thing I meet is people who think primary keys need to be > integer single field unique serial fields > > I tend to agree that primary keys should be single fields if they need > to be referenced but should also be natural if at all possible. ie use > car number plates rather than some serial int. I wouldn't trust plate number to be unique over time, since the format "ABC 123" only has a capacity of 17,576,000 vehicles. - -- Ron Johnson, Jr. Jefferson LA USA %SYSTEM-F-FISH, my hovercraft is full of eels -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFHRvTAS9HxQb37XmcRAiNRAJ40NhYEE7tVlx1jaBLPbjsf2RSW4ACcCLfc QGvy8Jz9Nja0kfEJYEx9VV4= =VnCw -----END PGP SIGNATURE----- ---------------------------(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
