Обсуждение: Case sensitivity
Discovering that text fields in Postgres are case sensitive - so "Text" <> "text" and both can go into the same UNIQUE column - threw me a bit, as this is different from other databases I've worked with. Is there a toggle to turn off case sensitivity, either for a whole database or for a column? Or do I just have to get used to ~*? -- Bruce
On Tue, 27 Feb 2001, Bruce Richardson wrote: > Discovering that text fields in Postgres are case sensitive - so "Text" > <> "text" and both can go into the same UNIQUE column - threw me a bit, > as this is different from other databases I've worked with. > > Is there a toggle to turn off case sensitivity, either for a whole > database or for a column? Or do I just have to get used to ~*? No, you can't turn it off, and yes, many people do notice that it's not the way some other databases work. (Some database make this configurable). You can use ~*, you can also index on function results (eg, you can create an index on a function. So, you could create unique index yourtable_pkey on yourtable ( upper(pkeyfield)); which would only allow one 'Joel', regardless of how you cap me. -- Joel Burton <jburton@scw.org> Director of Information Systems, Support Center of Washington
Bruce Richardson wrote: >Discovering that text fields in Postgres are case sensitive - so "Text" ><> "text" and both can go into the same UNIQUE column - threw me a bit, >as this is different from other databases I've worked with. Well, they are different, aren't they? >Is there a toggle to turn off case sensitivity, either for a whole >database or for a column? Or do I just have to get used to ~*? You can create a unique index on lower(column); ~* is very nice, any way. -- Oliver Elphick Oliver.Elphick@lfix.co.uk Isle of Wight http://www.lfix.co.uk/oliver PGP: 1024R/32B8FAA1: 97 EA 1D 47 72 3F 28 47 6B 7E 39 CC 56 E4 C1 47 GPG: 1024D/3E1D0C1C: CA12 09E0 E8D5 8870 5839 932A 614D 4C34 3E1D 0C1C ======================================== "If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness." I John 1:9