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Posted to issues-all@impala.apache.org by "Gabor Kaszab (Jira)" <ji...@apache.org> on 2020/07/31 14:02:00 UTC
[jira] [Work started] (IMPALA-10018) Implement ds_kll_rank()
function
[ https://issues.apache.org/jira/browse/IMPALA-10018?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Work on IMPALA-10018 started by Gabor Kaszab.
---------------------------------------------
> Implement ds_kll_rank() function
> --------------------------------
>
> Key: IMPALA-10018
> URL: https://issues.apache.org/jira/browse/IMPALA-10018
> Project: IMPALA
> Issue Type: New Feature
> Components: Backend, Frontend
> Reporter: Gabor Kaszab
> Assignee: Gabor Kaszab
> Priority: Major
>
> ds_kll_rank() receives two parameters: a STRING that represents a serialized DataSketches KLL sketch and a float to provide a probing value in the sketch.
> Returns a DOUBLE that is the rank of the given probing value in the range of [0,1]. E.g. a return value of 0.2 means that the probing value given as parameter is greater than the 20% of all the values in the sketch. Note, this is an approximate calculation.
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