presto-mongodb/src/main/java/io/prestosql/plugin/mongodb/ObjectIdFunctions.java/ObjectIdFunctions/isDistinctFrom
class ObjectIdFunctions:    @ScalarOperator(IS_DISTINCT_FROM)
    @SqlType(StandardTypes.BOOLEAN)
    public static boolean isDistinctFrom(@SqlType("ObjectId") Slice left, @IsNull boolean leftNull, @SqlType("ObjectId") Slice right, @IsNull boolean rightNull)
    {
        if (leftNull != rightNull) {
            return true;
        }
        if (leftNull) {
            return false;
        }
        return notEqual(left, right);
    }