Re: returning setof from insert ?

Laura Smith schrieb am 14.07.2021 um 13:22:
> A bit of pl/pgsql writer's block going on here ...
>
> Postgres complains "RETURN cannot have a parameter in function returning set" in relation to the below. I don't really want to have to "RETURNS TABLE" because that means I have to enumerate all the table columns.
>
> I'm sure I'm missing something simple here !
>
> CREATE OR REPLACE FUNCTION foobar(foo text,bar text) RETURNS SETOF bar AS $$
> DECLARE
> v_row bar%ROWTYPE;
> BEGIN
> insert into bar(f,b) values(foo,bar) returning * into v_row;
> return v_row;
> END;
> $$ language plpgsql;
>

You need to use RETURN NEXT:

CREATE OR REPLACE FUNCTION foobar(foo text,bar text)
RETURNS SETOF bar
AS $$
DECLARE
v_row bar%ROWTYPE;
BEGIN
insert into bar(f,b) values(foo,bar) returning * into v_row;
return next v_row;
END;
$$
language plpgsql;

But you don't need PL/pgSQL for this or store the result in a variable:

CREATE OR REPLACE FUNCTION foobar(foo text,bar text)
RETURNS SETOF bar
AS $$
insert into bar(f,b) values(foo,bar)
returning *;
$$
language sql;