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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: 20091118161847.GA3319@a-kretschmer.de (view raw or flat)
Thread:
Lists: pgsql-novice
In response to Thomas Løcke :
> Hey all,
> 
> http://pastebin.com/f1015226d
> 
> 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
-- 
Andreas Kretschmer
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Subject: My first PL/pgSQL function
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