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PigInputFormat
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PigInputFormat.RecordReaderFactory
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Helper class to create record reader |
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PigRecordReader
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A wrapper around the actual RecordReader and loadfunc - this is needed for two reasons 1) To intercept the initialize call from hadoop and initialize the underlying actual RecordReader with the right Context object - this is achieved by looking up the Context corresponding to the input split this Reader is supposed to process 2) We need to give hadoop consistent key-value types - text and tuple respectively - so PigRecordReader will call underlying Loader's getNext() to get the Tuple value - the key is null text since key is not used in input to map() in Pig. |
PigWritableComparators.
PigTextRawBytesComparator
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