presto-mongodb/src/main/java/io/prestosql/plugin/mongodb/ObjectIdFunctions.java/ObjectIdFunctions/hashCode
class ObjectIdFunctions:    @ScalarOperator(HASH_CODE)
    @SqlType(StandardTypes.BIGINT)
    public static long hashCode(@SqlType("ObjectId") Slice value)
    {
        return new ObjectId(value.getBytes()).hashCode();
    }