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Posted to issues-all@impala.apache.org by "Adam Tamas (Jira)" <ji...@apache.org> on 2020/09/04 07:36:00 UTC
[jira] [Resolved] (IMPALA-10133) Implement ds_hll_stringify()
[ https://issues.apache.org/jira/browse/IMPALA-10133?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Adam Tamas resolved IMPALA-10133.
---------------------------------
Fix Version/s: Impala 4.0
Resolution: Done
> Implement ds_hll_stringify()
> ----------------------------
>
> Key: IMPALA-10133
> URL: https://issues.apache.org/jira/browse/IMPALA-10133
> Project: IMPALA
> Issue Type: Sub-task
> Reporter: Adam Tamas
> Assignee: Adam Tamas
> Priority: Major
> Fix For: Impala 4.0
>
>
> This function receives a string that is a serialized Apache DataSketches
> HLL sketch and returns its stringified format.
> A stringified format should look like and contains the following data:
> {code:java}
> (select ds_hll_stringify(ds_hll_sketch(i)) from t;)
> +----------------------------------------------------+
> | _c0 |
> +----------------------------------------------------+
> | ### HLL SKETCH SUMMARY:
> Log Config K : 12
> Hll Target : HLL_4
> Current Mode : LIST
> Memory : true
> LB : 1.0
> Estimate : 1.0
> UB : 1.000049929250618
> OutOfOrder Flag: false
> Coupon Count : 1
> |
> +----------------------------------------------------+
> {code}
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