Home | About | Sematext search-lucene.com search-hadoop.com
 Search Hadoop and all its subprojects:

Switch to Threaded View
Pig >> mail # user >> Subtracting contents of two bags

Copy link to this message
Re: Subtracting contents of two bags
You can do an left outer join of A and B and then filter by B is null.


On Tue, Jan 22, 2013 at 4:46 AM, James Newhaven <[EMAIL PROTECTED]>wrote:

> Hi,
> I have two relations - A and B.  Both just contain user ids.
> I want to get a list of users who are in A but not in B.
> I am running Pig 0.9.1 and think this might be possible with the DIFF
> function. I can see that DIFF requires one relation that contains the two
> bags.
> How can I create a relation that contains two bags so it can be supplied to
> the DIFF function?
> Any suggestions would be appreciated.
> Thanks,
> James

*Note that I'm no longer using my Yahoo! email address. Please email me at
[EMAIL PROTECTED] going forward.*