Re: Functions return a select in a table, which data type I

В Пнд, 22.11.2004, в 00:07, André Toscano пишет:
> Hello, friends.
>
> If anybody can help, how can I do a FUNCTION return a result from a
> SELECT in a table in PostgreSQL?
> My Problem is the RETURN TYPE from a FUNCTION, I don´t know what I have
> to use to return the data as a select result.
>
> Example:
> ----------------
>
> DROP FUNCTION ACADEMICO.teste(int4);
>
> CREATE FUNCTION ACADEMICO.teste(int4)
> RETURNS ?????
> AS
> '
> select cod_aluno, nome, cpf from ACADEMICO.TB_alunos
>
> '
> LANGUAGE 'SQL';

CREATE TYPE foo_type AS (cod_aluno TEXT, nome TEXT, cpf TEXT);
CREATE FUNCTION bar(int4)
RETURNS SETOF foo_type
LANGUAGE 'SQL'
AS '
DECLARE
var_rec foo_type;
BEGIN
FOR var_rec IN SELECT cod_aluno, nome, cpf FROM table WHERE ... LOOP
RETURN NEXT var_rec;
END LOOP;
RETURN;
END;
';

--
Markus Bertheau <twanger(at)bluetwanger(dot)de>