[jira] [Assigned] (IMPALA-10132) Implement ds_hll_estimate_bounds()

["Fucun Chu (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-10132?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fucun Chu reassigned IMPALA-10132:
----------------------------------

    Assignee: Fucun Chu

> Implement ds_hll_estimate_bounds()
> ----------------------------------
>
>                 Key: IMPALA-10132
>                 URL: https://issues.apache.org/jira/browse/IMPALA-10132
>             Project: IMPALA
>          Issue Type: Sub-task
>            Reporter: Adam Tamas
>            Assignee: Fucun Chu
>            Priority: Major
>
> In hive ds_hll_estimate_bounds() gives back an array of doubles.
> An example for a sketch created from a table which contains only a single value:
> {code:java}
> (select ds_hll_estimate_bounds(ds_hll_sketch(i)) from t;)
> +-------------------------------+
> |              _c0              |
> +-------------------------------+
> | [1.0,1.0,1.0000998634873453]  |
> +-------------------------------+
> {code}
> The values of the array is probably a lower bound, an estimate and an upper bound of the sketch.



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