this is a very good explanation of flatten: http://ofps.oreilly.com/titles/9781449302641/advanced_pig_latin.html#foreach_flatten
On Wed, Apr 11, 2012 at 9:46 AM, James Newhaven <[email protected]>wrote: > Hi, > > Sorry, this is a PIG newbie question... > > When I use FLATTEN, I don't understand the structure of the relation that > is returned. > > For example, the following relation A is the result of using flatten: > > DESCRIBE A; > > A {null::group: chararray,null::tagcount: long} > > I'm not really sure why there is "null" prefixing group and tagcount. Can > anyone help explain what this means? > > Thanks, > James >
