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https://issues.apache.org/jira/browse/IMPALA-10558?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Fucun Chu resolved IMPALA-10558.
--------------------------------
Target Version: Impala 4.0
Resolution: Fixed
> Implement ds_theta_exclude() function.
> --------------------------------------
>
> Key: IMPALA-10558
> URL: https://issues.apache.org/jira/browse/IMPALA-10558
> Project: IMPALA
> Issue Type: New Feature
> Components: Backend, Frontend
> Reporter: Fucun Chu
> Assignee: Fucun Chu
> Priority: Major
> Fix For: Impala 4.0
>
>
> This function receives two strings that are serialized Apache DataSketches
> Theta sketches. Computes the a-not-b set operation given two sketches of same
> or different column.
> Example:
> {code:sql}
> select ds_theta_estimate(ds_theta_exclude(sketch1, sketch2)) from sketch_tbl;
> +-------------------------------------------------------+
> | ds_theta_estimate(ds_theta_exclude(sketch1, sketch2)) |
> +-------------------------------------------------------+
> | 5 |
> +-------------------------------------------------------+
> {code}
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