I have a timestamp of 2010-09-05 23:52:11,567

And I want to group by hour. 

Anyone have a udf that works for that format?

-----Original Message-----
From: Russell Jurney [mailto:russell.jur...@gmail.com] 
Sent: Sunday, September 26, 2010 1:50 PM
To: pig-user@hadoop.apache.org
Subject: NOT matches

How do you filter a relation by a field NOT matching a regex?

You would think this would work, but it does not:  B = FILTER A BY field_foo
NOT matches 'test'

Russ

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