COLLECT_SET() in Hive, keep duplicates?

Question

Is there a way to keep the duplicates in a collected set in Hive, or simulate the sort of aggregate collection that Hive provides using some other method? I want to aggregat

Answer 1

Here is the exact hive query that does this job (works only in hive > 0.13):

SELECT hash_id, collect_set( num_of_cats) FROM GROUP BY hash_id;