Write a UDF that generates a UUID in Java
something like this:
@description(name = "uuid", value = "_FUNC_() - Generate a unique uuid")
@SuppressWarnings({"UnusedDeclaration"})
public class Uuid extends UDF{
public Text evaluate() {
return new Text(UUID.randomUUID().toString());
}
}
On Tue, Nov 16, 2010 at 10:23 AM, afancy <grou...@gmail.com> wrote:
> Hi, Tim,
>
> I think sequential integer would be better. Is it difficult to generate a
> global integer?
> BTW: how to generate UUID in Hive? thanks
>
> Regards,
> afancy
>
> On Tue, Nov 16, 2010 at 9:11 AM, Tim Robertson
> <timrobertson...@gmail.com>wrote:
>
>> Does it need to be a sequential INT? If not, then a UUID works very well.
>>
>> Cheers,
>> Tim
>>
>>
>> On Tue, Nov 16, 2010 at 8:55 AM, afancy <grou...@gmail.com> wrote:
>> > Hi, Zhang,
>> > How to integrate this snowflake with Hive? Thanks!
>> > Regards,
>> > afancy
>> >
>> > On Mon, Nov 15, 2010 at 10:35 AM, Jeff Zhang <zjf...@gmail.com> wrote:
>> >>
>> >> Please refer https://github.com/twitter/snowflake
>> >>
>> >>
>> >>
>> >> On Mon, Nov 15, 2010 at 5:09 PM, afancy <grou...@gmail.com> wrote:
>> >> > Hi,
>> >> > Does anybody know how to generate a unique ID in Hive? I have a
>> table:
>> >> > hive> describe results;
>> >> > OK
>> >> > id int
>> >> > test string
>> >> > Time taken: 0.091 seconds
>> >> >
>> >> > When I insert data into the table results, i want to generate a
>> unqiue
>> >> > Id,
>> >> > which is like a sequence in RDBMS.
>> >> > Regards,
>> >> > afancy
>> >>
>> >>
>> >>
>> >> --
>> >> Best Regards
>> >>
>> >> Jeff Zhang
>> >
>> >
>>
>
>
