Pig – Functions

Friends , Functions in Pig come in four types 1. Eval function – A function that takes one or more expressions and returns another expression. – Some function are aggregate function like MAX – Some functions are algebraic, which means that the result of the function may be calculated incrementally. – In MapReduce term algebric … More Pig – Functions

Pig – A programmer friendly MapReduce tool

Pig raises the level of abstraction for processing large datasets. MapReduce allow you , to specify map function followed by reduce function , but working out how to fit your data processing into this pattern , which often require multiple MapReduce stages, can be a challange. Pig supports richer data structure, typically being multivalued & … More Pig – A programmer friendly MapReduce tool