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Posted to issues@impala.apache.org by "Michael Smith (Jira)" <ji...@apache.org> on 2025/10/28 00:51:00 UTC

[jira] [Resolved] (IMPALA-9593) Implement count(distinct) function (DataSketches/HLL)

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

Michael Smith resolved IMPALA-9593.
-----------------------------------
    Fix Version/s: Impala 4.0.0
       Resolution: Fixed

> Implement count(distinct) function (DataSketches/HLL)
> -----------------------------------------------------
>
>                 Key: IMPALA-9593
>                 URL: https://issues.apache.org/jira/browse/IMPALA-9593
>             Project: IMPALA
>          Issue Type: Epic
>          Components: Backend
>            Reporter: Boglarka Egyed
>            Assignee: Gabor Kaszab
>            Priority: Major
>             Fix For: Impala 4.0.0
>
>
> 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/tree/master/hll



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