Re: Add a check an a array column

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От Bret Stern
Тема Re: Add a check an a array column
Дата
Msg-id 1347135505.2163.2.camel@fedora13
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Ответ на Re: Add a check an a array column  (Andreas Kretschmer <akretschmer@spamfence.net>)
Ответы Re: Add a check an a array column
Re: Add a check an a array column
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On Sat, 2012-09-08 at 21:24 +0200, Andreas Kretschmer wrote:
> Joel Hoffman <joel.hoffman@gmail.com> wrote:
>
> > More concisely, you can compare directly against all values of the array:
> >
> > # create table i (i int[] check (0 <= ALL(i) AND 1023 >= ALL(i)));
> > # insert into i values (ARRAY[0,1,2,3,1023]);
> > # insert into i values (ARRAY[0,1,2,3,-1]);
> > ERROR:  new row for relation "i" violates check constraint "i_i_check"
>
> Nice! Didn't know that with all()
>

A better place for validation is in the front-end, before
adding/attempting to add data to the db (my opinion).
Nice to see there are always other ways though.

>
> Andreas
> --
> Really, I'm not out to destroy Microsoft. That will just be a completely
> unintentional side effect.                              (Linus Torvalds)
> "If I was god, I would recompile penguin with --enable-fly."   (unknown)
> Kaufbach, Saxony, Germany, Europe.              N 51.05082°, E 13.56889°
>
>




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