That's basically right. Input (key/value) pair of mapper is (Text
(don't care), Tuple), and the output is (PigNullableWritable(shuffle
key), Writable(value)). LoadFunc (PigStorage, OrcStorage) is
responsible to translate WritableComparable from InputFormat to Pig


On Wed, May 21, 2014 at 5:34 AM, Abbass MAROUNI

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