Also keep in mind that a Pig relation is not aware of the order of records unless right after the ORDER statement. I guess that you need to use a row with a preceding row,corrent? Probably you'll need the RANK: http://pig.apache.org/docs/r0.11.1/basic.html#rank to use as a key for the join.
> You need to load your data twice and then use it as any other join. > Self-join is just like any other join to Pig. > > Regards, > Shahab > > > On Sun, Sep 15, 2013 at 1:37 PM, Raj hadoop <[EMAIL PROTECTED]> wrote: > > > Hi, > > > > I need to subtract row2 value from row1. how to get it in Pig? > > > > Thanks > > Rajesh > > >
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