You should create a functional index here. Ries
> -----Oorspronkelijk bericht----- > Van: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Robert Treat > Verzonden: dinsdag 6 april 2004 16:30 > Aan: [EMAIL PROTECTED] > Onderwerp: [SQL] partial unique constraint > > > Trying to come up with the proper syntax to meet the > following criteria: > > create table foo (bar integer, baz boolean UNIQUE (bar, baz = true)); > > note the above syntax is not correct, but should demonstrate what i'm > trying to do; I want to add a unique constraint such that we > only allow > one case of bar and baz = true... i can have unlimited bar and baz = > false, and there can be multiple bar and baz = true if the bars are > different... did some doc reading and mail list searching but a valid > syntax for this seems to be escaping me... > > btw I'm pretty sure I could do this with an external trigger, but am > wondering about a constraint oriented approach > > Robert Treat > -- > Build A Brighter Lamp :: Linux Apache {middleware} PostgreSQL > > > ---------------------------(end of > broadcast)--------------------------- > TIP 7: don't forget to increase your free space map settings > ---------------------------(end of broadcast)--------------------------- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to [EMAIL PROTECTED])
