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https://issues.apache.org/jira/browse/IMPALA-10131?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adam Tamas updated IMPALA-10131:
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Summary: Document ds_kll_* functions (was: Document ds_hll_* functions)
> Document ds_kll_* functions
> ---------------------------
>
> Key: IMPALA-10131
> URL: https://issues.apache.org/jira/browse/IMPALA-10131
> Project: IMPALA
> Issue Type: New Feature
> Components: Docs
> Affects Versions: Impala 4.0
> Reporter: Adam Tamas
> Priority: Major
> Labels: doc
>
> There were some new functions added recently to add support for Apache
> DataSketches KLL calculations. These functions purpose is to give an
> approximate boundaries for
> a given dataset. It is an implementation of a very compact quantiles sketch
> with lazy compaction scheme and nearly optimal accuracy per bit.
> The newly introduced functions are:
> ds_kll_sketch()
> ds_kll_quantile()
> ds_kll_quantiles_as_string()
> ds_kll_n()
> ds_kll_union()
> ds_kll_rank()
> ds_kll_pmf_as_string()
> ds_kll_cdf_as_string()
> ds_kll_stringify()
> Related Jiras:
> https://issues.apache.org/jira/browse/IMPALA-9959
> https://issues.apache.org/jira/browse/IMPALA-9962
> https://issues.apache.org/jira/browse/IMPALA-9963
> https://issues.apache.org/jira/browse/IMPALA-10017
> https://issues.apache.org/jira/browse/IMPALA-10018
> https://issues.apache.org/jira/browse/IMPALA-10019
> https://issues.apache.org/jira/browse/IMPALA-10020
> https://issues.apache.org/jira/browse/IMPALA-10108
> We should document these and mark them as experimental features so that users
> can try out and hopefully give feedback.
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