

Compute Product of Values in Bag
I was wondering if there is a way to compute the product of all the values
in a bag much like the built in function SUM does currently. For reference, I am currently implementing a multinomial naive bayes classifier and need to compute the product of probabilities. I am trying to avoid using a UDF because the requirements of the project prohibit me from using a secondary language such as python, javascript, etc. Thanks, Sergey 
