Re: plpgsql function Syntax

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От derrick@grifflink.com
Тема Re: plpgsql function Syntax
Дата
Msg-id 00fc01c4909b$bd9e5f20$0200a8c0@main
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Ответ на plpgsql function Syntax  (derrick@grifflink.com)
Список pgsql-novice
Excellent!  Thank you.

Derrick
----- Original Message -----
From: "Stephan Szabo" <sszabo@megazone.bigpanda.com>
To: <derrick@grifflink.com>
Cc: <pgsql-novice@postgresql.org>
Sent: Wednesday, September 01, 2004 8:32 PM
Subject: Re: [NOVICE] plpgsql function Syntax


>
> On Wed, 1 Sep 2004 derrick@grifflink.com wrote:
>
> > Is it possible to get a select statement to work like this with a for
loop?
> >
> > CREATE FUNCTION public.search(int4)
> >   RETURNS SETOF search1 AS
> > '
> > DECLARE
> > category alias for $1;
> > newrows search1%rowtype;
> > rec RECORD;
> > SQLCommand varchar;
> >
> > BEGIN
> >     IF (category = 0) THEN
> >         SQLCommand := 'SELECT * FROM table';
> >     ELSE
> >         SQLCommand := 'SELECT idnumber FROM table';
> >     END IF;
> >
> >     FOR rec IN SQLCommand
> >         LOOP
> >             ...blah...
> >             ...blah...
> >     END LOOP;
> >
> > Basically I want to create the SELECT statement dynamically and then use
> > that select statement in subsequent querries later in the function.
Will
> > this syntax work or should I try to use a VIEW?
>
> You should be able to use FOR rec IN EXECUTE SQLCommand LOOP to execute
> the string and loop over the results I think.
>
>


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