Re: Using Random Sequence as Key

Bernardo de Barros Franco writes:

> But my only question would be, in the example quoted would id be really the
> table index and is it unique?

Making unique *and* random numbers is a pretty complex (and slow) thing to
do in general.  Consider redesigning your application.

>
> Thank you
>
> Quoting:
> >Bernardo de Barros Franco writes:
> >
> > > I wanted to index a table by a random key. Exemplifying, when a insert
> >is
> > > made, the id value is automatically filled with a random number between
> > > 10000 and 99999.
> >
> >=> create table test (id int default random() * 89999 + 10000, content
> >text);
> >CREATE
> >=> insert into test (content) values ('hi');
> >INSERT 36163 1
> >=> insert into test (content) values ('there');
> >INSERT 36164 1
> >=> insert into test (content) values ('blah');
> >INSERT 36165 1
> >=> select * from test;
> >   id   | content
> >-------+---------
> >  61616 | hi
> >  72605 | there
> >  83469 | blah
> >(3 rows)
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-- 
Peter Eisentraut   peter_e@gmx.net   http://funkturm.homeip.net/~peter