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Posted to issues-all@impala.apache.org by "Csaba Ringhofer (Jira)" <ji...@apache.org> on 2020/04/02 12:23:00 UTC

[jira] [Updated] (IMPALA-9593) Implement count(distinct) function

     [ https://issues.apache.org/jira/browse/IMPALA-9593?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Csaba Ringhofer updated IMPALA-9593:
------------------------------------
    Description: 
Implement the count(distinct) function from the DataSketches library for HLL in C++.

General info about the sketch:
http://datasketches.apache.org/docs/HLL/HLL.html

C++ implementation to wrap:
https://github.com/apache/incubator-datasketches-cpp/hll

  was:Implement the count(distinct) function from the DataSketches library for HLL in C++.


> Implement count(distinct) function
> ----------------------------------
>
>                 Key: IMPALA-9593
>                 URL: https://issues.apache.org/jira/browse/IMPALA-9593
>             Project: IMPALA
>          Issue Type: New Feature
>            Reporter: Boglarka Egyed
>            Priority: Major
>
> Implement the count(distinct) function from the DataSketches library for HLL in C++.
> General info about the sketch:
> http://datasketches.apache.org/docs/HLL/HLL.html
> C++ implementation to wrap:
> https://github.com/apache/incubator-datasketches-cpp/hll



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