presto-mongodb/src/main/java/io/prestosql/plugin/mongodb/ObjectIdFunctions.java/ObjectIdFunctions/notEqual
class ObjectIdFunctions:    @ScalarOperator(NOT_EQUAL)
    @SqlType(StandardTypes.BOOLEAN)
    @SqlNullable
    public static Boolean notEqual(@SqlType("ObjectId") Slice left, @SqlType("ObjectId") Slice right)
    {
        return !left.equals(right);
    }