Skip site navigation (1) Skip section navigation (2)

Re: My second PL/pgSQL function - minor problem

From: "A(dot) Kretschmer" <andreas(dot)kretschmer(at)schollglas(dot)com>
To: pgsql-novice(at)postgresql(dot)org
Subject: Re: My second PL/pgSQL function - minor problem
Date: 2009-11-18 16:18:48
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-novice
In response to Thomas Løcke :
> Hey all,
> The above function appears to be doing exactly what I want: Fetch the users
> data and update the visits column, if the supplied credentials match a user.
> My problem is what happens when the credentials don't match a user. In those
> cases I would like to have a boolean false returned, but instead I get an empty
> array - which of course is entirely according to the functions "RETURN SETOF
> users" statement.
> Is this little problem solvable, or will I have to learn to live with the empty
> array?

You can't return different return-types. Either return forever a record
or an bool.

But you can use select exists( select * from log_in( ...) ) to get
true/false it there a user or not.

Andreas Kretschmer
Kontakt:  Heynitz: 035242/47150,   D1: 0160/7141639 (mehr: -> Header)
GnuPG: 0x31720C99, 1006 CCB4 A326 1D42 6431  2EB0 389D 1DC2 3172 0C99

In response to

pgsql-novice by date

Next:From: Didier Gasser-MorlayDate: 2009-11-18 16:45:04
Subject: My first PL/pgSQL function
Previous:From: Thomas LøckeDate: 2009-11-18 15:52:40
Subject: My second PL/pgSQL function - minor problem

Privacy Policy | About PostgreSQL
Copyright © 1996-2017 The PostgreSQL Global Development Group