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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>
wrote:

> @ 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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