SQL/MapReduce: A practical approach to self-describing, polymorphic, and parallelizable user-defined functions.

Eric Friedman Peter M. Pawlowski John Cieslewicz SQL/MapReduce: A practical approach to self-describing, polymorphic, and parallelizable user-defined functions. 1402-1413 2009 2 PVLDB 2 http://www.vldb.org/pvldb/2/vldb09-464.pdf db/journals/pvldb/pvldb2.html#FriedmanPC09