PostgreSQL - Procedimiento almacenado para retornar el ultimo registro ingresado

CREATE OR REPLACE FUNCTION sch_recursos_humanos.spenrolarguardar(

    IN p_id_funcionario integer,

    IN p_id_regimen integer,

    IN p_id_cargo integer,

    IN p_descripcion character varying,

    IN p_detalle character varying,

    IN p_observacion character varying,

    IN p_usuario_app integer)

  RETURNS SETOF RECORD AS

$BODY$

	DECLARE

    v_numero_enrolados INT DEFAULT 0;

    v_mes INT DEFAULT 0;

    v_ano INT DEFAULT 0;

    ins RECORD;

		BEGIN

		v_mes =  date_part('month',now());

    v_ano =  date_part('years',now());

    SELECT COUNT(*) INTO v_numero_enrolados FROM sch_recursos_humanos.enrolar;

    WITH ins AS (

      INSERT INTO sch_recursos_humanos.enrolar (id_funcionario, id_regimen, id_cargo, numero_enrolado, codigo_enrolado, descripcion, detalle, observacion, usuario_app)

  		VALUES(p_id_funcionario, p_id_regimen, p_id_cargo, v_numero_enrolados, v_numero_enrolados + 1 || '.' || p_id_funcionario || '.' || p_id_regimen || '.' || p_id_cargo || '.' || v_mes || '.' || v_ano  , p_descripcion, p_detalle, p_observacion, p_usuario_app)

      RETURNING *

    )

      RETURN SELECT * FROM ins;

	END;

$BODY$

  LANGUAGE plpgsql VOLATILE;