I can't use CHECK command?

[oliver mohr]

I'm getting the following error when trying to use CHECK command:

-- -----------------------------------------------------
-- Table `aaa`.`empleado`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `aaa`.`empleado` (

`rut_e` INT( 8 ) NOT NULL ,
`nombre` VARCHAR( 35 ) NOT NULL ,
`apelido` VARCHAR( 35 ) NOT NULL ,
`calle_nro` VARCHAR( 35 ) NOT NULL ,
`comuna` VARCHAR( 35 ) NOT NULL ,
`region` VARCHAR( 35 ) NOT NULL ,
`fecha_contrato` DATE NOT NULL ,
`tipo_empleado` VARCHAR( 1 ) NOT NULL `rut_a_fk` INT( 8 ) NULL ,
CHECK (
`tipo_empleado` IN (
`a` ,
`v` ,
`j`
)
),
PRIMARY KEY ( `rut_e` ) ,
INDEX `rut_a_fk` ( `rut_a_fk` ASC ) ,
CONSTRAINT `rut_a_fk` FOREIGN KEY ( `rut_a_fk` ) REFERENCES `aaa`.`administrador` (
`rut_a`
) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE = INNODB;



MySQL ha dicho:

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '`rut_a_fk` INT(8) NULL ,
CHECK (`tipo_empleado` IN (`a`,`v`,`j`)),

PRI' at line 14