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 |
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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
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Andreas Kretschmer
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