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, so if possible the execution will performed in a distributed fashion.
MAX can operate on any numeric type and on chararrays. It can also operate on bytearrays, which it will cast to doubles. It expects a bag of tuples of one record each. If Pig knows from the schema that this function will be passed a bag of integers or longs, it will use a specially adapted version of MAX that uses integer arithmetic for comparing the data. The return type of MAX will match the input type.
MAX implements the
interface as well.
While this will never be
the preferred method of usage it is available in case the combiner can not be
used for a given calculation.
* @see org.apache.pig.EvalFunc#getArgToFuncMapping()
funcList.add(new FuncSpec(DateTimeMax.class.getName(), Schema.generateNestedSchema(DataType.BAG, DataType.DATETIME)));