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From Ted Dunning <ted.dunn...@gmail.com>
Subject Re: Counting large numbers of unique values
Date Tue, 07 Apr 2015 17:22:57 GMT
On Tue, Apr 7, 2015 at 9:19 AM, Marcin Karpinski <mkarpinski@opera.com>

> @ Ted, ideally, I'd like to get exact results, but in case of real
> problems, we could perhaps settle on approximate counting. Is there already
> such a functionality in Drill?

No.  But it is very easy to incorporate existing libraries to get this
capability.  The UDF structure for aggregators is pretty straightforward.

Would you like some help getting this to happen?

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