Drill with String Aggregation

[Bosung Seo]

Hello,

I found that Drill doesn't support string_agg function yet.
Is there another way to query as the string_agg function?

If I have a table,
user   | id
user1 | 1
user1 | 2
user1 | 3
user2 | 1

I want to make like this.
user   | ids
user1 | 1,2,3
user2 | 1

Any help would be appreciated.

Thanks,
Bo