Stored Procedure no MySQL com erro

PROCEDURE bancovendas.PROC_VERIFICA_ACESSO_MENU(IN CODUSUARIO INTEGER, IN CODMENU INTEGER, OUT CONSULTAR CHAR(1))
BEGIN 
  DECLARE GU_CONSULTAR CHAR(1); 
  SET CONSULTAR = 'N';
Loop_Label:  LOOP SELECT PU_CONSULTAR FROM PERMISSOES_USUARIOS
    WHERE USU_CODIGO = CODUSUARIO AND
    MEN_CODIGO = CODMENU
  UNION
  SELECT PG_CONSULTAR FROM PERMISSOES_GRUPOS
    WHERE GRU_CODIGO IN (
    SELECT GRU_CODIGO FROM GRUPOS_USUARIOS
    WHERE USU_CODIGO = CODUSUARIO) AND
    MEN_CODIGO = CODMENU
  INTO GU_CONSULTAR;
  /*DO
  BEGIN*/
    IF (GU_CONSULTAR = 'S') THEN
    /*BEGIN*/
     SET CONSULTAR = 'S';
     LEAVE Loop_Label;
    END IF;
  END LOOP Loop_Label;
END

PROCEDURE bancovendas.PROC_VERIFICA_DIREITOS_ACESSO(IN CODUSUARIO INTEGER, IN CODMENU INTEGER, OUT NOVO CHAR(1), OUT ALTERAR CHAR(1), OUT APAGAR CHAR(1))
BEGIN
DECLARE ADM CHAR(1);
DECLARE GU_NOVO CHAR(1);
DECLARE GU_ALTERAR CHAR(1);
DECLARE GU_APAGAR CHAR(1);
/*BEGIN*/
  SET NOVO = 'N'; 
  SET ALTERAR = 'N'; 
  SET APAGAR = 'N';
  SELECT USU_ADMIN FROM USUARIOS
    WHERE USU_CODIGO = CODUSUARIO
  INTO ADM;
  IF (ADM = 'S') THEN
    /*BEGIN*/
    SET NOVO = 'S';
    SET ALTERAR = 'S';
    SET APAGAR = 'S';
    /*EXIT;*/
  END IF; /*IF*/
 
Loop_Label:  LOOP SELECT PU_NOVO, PU_ALTERAR, PU_APAGAR
    FROM PERMISSOES_USUARIOS
    WHERE USU_CODIGO = CODUSUARIO AND
    MEN_CODIGO = CODMENU
  UNION
  SELECT PG_NOVO, PG_ALTERAR, PG_APAGAR
    FROM PERMISSOES_GRUPOS
    WHERE GRU_CODIGO IN (SELECT GRU_CODIGO
    FROM GRUPOS_USUARIOS
    WHERE USU_CODIGO = CODUSUARIO) AND
    MEN_CODIGO = CODMENU
  INTO GU_NOVO, GU_ALTERAR, GU_APAGAR;
  /*DO
  BEGIN*/
    IF (GU_NOVO = 'S') THEN
      SET NOVO = 'S';
    END IF;
    IF (GU_ALTERAR = 'S') THEN
      SET ALTERAR = 'S';
    END IF;
    IF (GU_APAGAR = 'S') THEN
      SET APAGAR = 'S';
    END IF;
  END LOOP Loop_Label;
END

    IF (GU_NOVO = 'S') THEN
      SET NOVO = 'S';

SELECT PU_CONSULTAR FROM PERMISSOES_USUARIOS
    WHERE USU_CODIGO = CODUSUARIO AND
    MEN_CODIGO = CODMENU
  UNION
  SELECT PG_CONSULTAR FROM PERMISSOES_GRUPOS
    WHERE GRU_CODIGO IN (
    SELECT GRU_CODIGO FROM GRUPOS_USUARIOS
    WHERE USU_CODIGO = CODUSUARIO) AND
    MEN_CODIGO = CODMENU

SELECT PU_CONSULTAR FROM PERMISSOES_USUARIOS

Minha 2ª STORED PROCEDURE 

DROP PROCEDURE IF EXISTS `bancovendas`.`PROC_VERIFICA_DIREITOS_ACESSO`;

DELIMITER $$
CREATE PROCEDURE `bancovendas`.`PROC_VERIFICA_DIREITOS_ACESSO` (IN CODUSUARIO INTEGER, IN CODMENU INTEGER, OUT NOVO CHAR(1), OUT ALTERAR CHAR(1), OUT APAGAR CHAR(1))

SET NOVO = 'N';
SET ALTERAR = 'N';
SET APAGAR = 'N';

IF EXISTS (SELECT USU_ADMIN FROM USUARIOS 
           WHERE USU_CODIGO = CODUSUARIO)
THEN 
 SET NOVO = 'S';
 SET ALTERAR = 'S';
 SET APAGAR = 'S';

ELSEIF EXISTS (SELECT PU_NOVO, PU_ALTERAR, PU_APAGAR
               FROM PERMISSOES_USUARIOS
               WHERE USU_CODIGO = CODUSUARIO AND
               MEN_CODIGO = CODMENU)

CREATE PROCEDURE PROC_VERIFICA_DIREITOS_ACESSO (
  CODUSUARIO INTEGER, CODMENU INTEGER)
RETURNS (NOVO CHAR(1), ALTERAR CHAR(1),
  APAGAR CHAR(1))
AS
DECLARE VARIABLE ADM BOOLEAN;
DECLARE VARIABLE GU_NOVO BOOLEAN;
DECLARE VARIABLE GU_ALTERAR BOOLEAN;
DECLARE VARIABLE GU_APAGAR BOOLEAN;
BEGIN
  NOVO = 'N'; 
  ALTERAR = 'N';
  APAGAR = 'N';
  SELECT USU_ADMIN FROM USUARIOS
    WHERE USU_CODIGO = :CODUSUARIO
  INTO :ADM;
  IF (:ADM = TRUE) THEN
  BEGIN
    NOVO = 'S';
    ALTERAR = 'S';
    APAGAR = 'S';
    EXIT;
  END
 
  FOR SELECT PU_NOVO, PU_ALTERAR, PU_APAGAR
    FROM PERMISSOES_USUARIOS
    WHERE USU_CODIGO = :CODUSUARIO AND
    MEN_CODIGO = :CODMENU
  UNION
  SELECT PG_NOVO, PG_ALTERAR, PG_APAGAR
    FROM PERMISSOES_GRUPOS
    WHERE GRU_CODIGO IN (SELECT GRU_CODIGO
    FROM GRUPOS_USUARIOS
    WHERE USU_CODIGO = :CODUSUARIO) AND
    MEN_CODIGO = :CODMENU
  INTO :GU_NOVO, :GU_ALTERAR, :GU_APAGAR
  DO
  BEGIN
    IF (:GU_NOVO = TRUE) THEN
      NOVO = 'S';
    IF (:GU_ALTERAR = TRUE) THEN
      ALTERAR = 'S';
    IF (:GU_APAGAR = TRUE) THEN
      APAGAR = 'S';
  END
END