"David G. Johnston" <david.g.johnston@xxxxxxxxx> writes:
> On Sat, Jun 20, 2015 at 10:56 AM, Tom Lane <tgl@xxxxxxxxxxxxx> wrote:
>
> "David G. Johnston" <david.g.johnston@xxxxxxxxx> writes:
> > I know this could be written quite easily in sql but was wondering if it is
> > possible in pl/pgsql.
>
> > CREATE FUNCTION test_func()
> > RETURNS text
> > LANGUAGE 'plpgsql'
> > AS $$
> > BEGIN
> > SELECT 'text_to_return' INTO <what_goes_here?>; --with or without a cast
> > RETURN <what_goes_here?>;
> > END;
> > $$;
>
> > The goal is to return the value of text_to_return without declaring an
> > explicit variable to name in the INTO clause.
>
> INTO requires a declared variable as target.
>
> However, I'm wondering why you don't just use "RETURN expression"
> if this is all that will be in the function.
>
> â??The use of SELECT is required and will likely have a CTE
> and a set of SQL CASE expressions as part of it. â?? It
> isn't a problem to declare it myself but I thought I had read about
> there being an implicit variable name that could be used instead.Â
> I guess I mis-remembered...
Try this...
sj$ psql -eqf q
begin;
create table foo as
select 'here goes some text'::text as tf;
create function foo ()
returns text
as $$
begin
return case when true then tf end from foo limit 1;
end
$$ language plpgsql;
select foo();
foo
---------------------
here goes some text
(1 row)
abort;
sj$
HTH
>
> â??Thanks for the quick response.
>
> David J.
>
--
Jerry Sievers
Postgres DBA/Development Consulting
e: postgres.consulting@xxxxxxxxxxx
p: 312.241.7800
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