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Hive >> mail # user >> Pseudo column for the entire Line/Row ?

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Pseudo column for the entire Line/Row ?
I am writing a UDF that will perform validation on the input row and shall
require access to every column in the row (or alternatively to simply the
unparsed/pre-processed line).

Is there any way to achieve this?  Or will it be simply necessary to
declare an overloaded evaluate() method with a signature comprising every
field ?

Suggestion of alternative tactics also welcomed.