Hello
The solution proposed by Tom works as long as you can make sure that
your SELECT statement in the function will return a single row with a
single column of type TEXT:
CREATE TABLE test (id INTEGER, what_goes_here TEXT);
INSERT INTO test values (1,'Text 1');
INSERT INTO test values (2,'Text 2');
CREATE FUNCTION test_func()
RETURNS text
LANGUAGE 'plpgsql'
AS $$
BEGIN
RETURN (SELECT what_goes_here FROM test LIMIT 1);
END;
$$;
SELECT * FROM test_func();
test_func
-----------
Text 1
(1 row)
No need for INTO.
Bye
Charles
On 6/20/2015 17:07, David G. Johnston wrote:
On Sat, Jun 20, 2015 at 10:56 AM, Tom Lane <t...@sss.pgh.pa.us
<mailto:t...@sss.pgh.pa.us>>wrote:
"David G. Johnston" <david.g.johns...@gmail.com
<mailto:david.g.johns...@gmail.com>> 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.
The use of SELECT is required and will likely have a CTE and a set
of SQL CASE expressions as part of it.
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. I
guess I mis-remembered...
Thanks for the quick response.
David J.
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