How can I add row numbers for rows in PIG or HIVE?

Question

I have a problem when adding row numbers using Apache Pig. The problem is that I have a STR_ID column and I want to add a ROW_NUM column for the data in STR_ID, which is the

Answer 1

Facebook posted a number of hive UDFs including NumberRows. Depending on your hive version (I believe 0.8) you may need to add an attribute to the class (stateful=true).