ohhh interesting... hmmm... You mean like:
Rows:
10:01, beans, chocolate, 9, 1
10:30, beans, chocolate, 4, 2
10:45, eggs, waffles, 4, 3
10:48, eggs, waffles, 6, 4
Would produce:
10:00, beans, chocolate, 13, [1,2]
10:00, eggs, waffles, 10, [3,4]
?
I suspect you might need to write your own custom aggregator:
You could email the dev-list if you would like to ask other Druid devs for assistance on that front...
- pete