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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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