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https://issues.apache.org/jira/browse/IMPALA-10017?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on IMPALA-10017 started by Gabor Kaszab.
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> Implement ds_kll_union() function
> ---------------------------------
>
> Key: IMPALA-10017
> URL: https://issues.apache.org/jira/browse/IMPALA-10017
> Project: IMPALA
> Issue Type: New Feature
> Components: Backend, Frontend
> Reporter: Gabor Kaszab
> Assignee: Gabor Kaszab
> Priority: Major
>
> Similarly to https://issues.apache.org/jira/browse/IMPALA-9633 DataSketches
> KLL also has union functionality.
> ds_kll_union() expects a dataset of STRINGs (e.g. column of a table) that
> represents serialized KLL sketches and returns a single STRING that is the
> received sketches unioned and serialized.
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