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Pig >> mail # user >> group by clickstream

Steve Bernstein 2012-08-29, 23:27
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RE: group by clickstream
Some clarification on the below.  Ignore the outer bag, I'd removed some data elements for clarity and simplicity.  Basically, I'm trying to find a way to go from:


For an abritrary number of "pg" tuples.


-----Original Message-----
From: Steve Bernstein [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, August 29, 2012 4:28 PM
Subject: group by clickstream

Hi all,
I have a bag, clickstreams: {clickStream: {pageName: chararray}}, for which each row represents a sequence of pages and events in a single session on a website.  The interior bag, clickstream, represents this as a sequence of one or more single element tuples, e.g.,


I'd like to group by the sequences so I can get counts and ultimately sort to find the most common clickstreams.  A bag can't be a key for grouping, I've discovered, but it seems like it ought to be easy to flatten the clickstream bag into some other form such that the sequences can be used as keys for grouping.  But I can't figure it out.

Any ideas?

Steve Bernstein 2012-08-30, 16:22
=?KOI8-U?B?96bUwcymyiD0yc... 2012-08-31, 20:48
Steve Bernstein 2012-08-31, 23:14