create table `vn`.`buyImportReference`
(
	itemFk int not null,
	name varchar(80) not null,
	company varchar(80) not null,
	size int not null,
	constraint buyImportReference_pk
		primary key (itemFk, name, company, size),
	constraint itemFk___fk
		foreign key (itemFk) references item (id)
			on update cascade on delete cascade
)
comment 'Referencias de compras importadas';