Question

I do outer joins on single columns in Pig like this

result = JOIN A by id LEFT OUTER, B by id;

How do I join on two columns, something like –

WHERE A.id=B.id AND A.name=B.name

What is the pig equivalent? I couldn’t find any example in the pig manuals…any help?

Answer 1

Answering the question myself –

join a by (id, name), b by (id, name) 

http://ofps.oreilly.com/titles/9781449302641/advanced_pig_latin.html