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https://issues.apache.org/jira/browse/SPARK-30395?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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jiaan.geng resolved SPARK-30395.
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Resolution: Duplicate
Duplicate with https://issues.apache.org/jira/browse/SPARK-30276
> When one or more DISTINCT aggregate expressions operate on the same field,
> the DISTINCT aggregate expression allows the use of the FILTER clause
> ------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-30395
> URL: https://issues.apache.org/jira/browse/SPARK-30395
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: jiaan.geng
> Priority: Major
>
> This ticket is related to https://issues.apache.org/jira/browse/SPARK-27986
> This ticket will support:
> When one or more DISTINCT aggregate expressions operate on the same field,
> the DISTINCT aggregate expression allows the use of the FILTER clause
> such as:
>
> {code:java}
> select sum(distinct id) filter (where sex = 'man') from student;
> select class_id, sum(distinct id) filter (where sex = 'man') from student
> group by class_id;
> select count(id) filter (where class_id = 1), sum(distinct id) filter (where
> sex = 'man') from student;
> select class_id, count(id) filter (where class_id = 1), sum(distinct id)
> filter (where sex = 'man') from student group by class_id;
> select sum(distinct id), sum(distinct id) filter (where sex = 'man') from
> student;
> select class_id, sum(distinct id), sum(distinct id) filter (where sex =
> 'man') from student group by class_id;
> select class_id, count(id), count(id) filter (where class_id = 1),
> sum(distinct id), sum(distinct id) filter (where sex = 'man') from student
> group by class_id;
> {code}
>
> but not support:
>
> {code:java}
> select class_id, count(distinct sex), sum(distinct id) filter (where sex =
> 'man') from student group by class_id;
> select class_id, count(distinct sex) filter (where class_id = 1),
> sum(distinct id) filter (where sex = 'man') from student group by
> class_id;{code}
> https://issues.apache.org/jira/browse/SPARK-30396 used for later.
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