def visit_primary_key_constraint(self, constraint):
        text = super(MySQLDDLCompiler, self).\
            visit_primary_key_constraint(constraint)
        using = constraint.dialect_options['mysql']['using']
        if using:
            text += " USING %s" % (self.preparer.quote(using))
        return text
dataset/ETHPy150Open zzzeek/sqlalchemy/lib/sqlalchemy/dialects/mysql/base.py/MySQLDDLCompiler.visit_primary_key_constraint/original