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Posted to issues@spark.apache.org by "Chaerim Yeo (JIRA)" <ji...@apache.org> on 2019/04/10 09:45:00 UTC

[jira] [Updated] (SPARK-27425) Add count_if functions

     [ https://issues.apache.org/jira/browse/SPARK-27425?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chaerim Yeo updated SPARK-27425:
--------------------------------
    Summary: Add count_if functions  (was: SQL count_if functions)

> Add count_if functions
> ----------------------
>
>                 Key: SPARK-27425
>                 URL: https://issues.apache.org/jira/browse/SPARK-27425
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.4.1
>            Reporter: Chaerim Yeo
>            Priority: Minor
>
> Add aggregation function which returns the number of records satisfying a given condition.
> For Presto, [{{count_if}}|https://prestodb.github.io/docs/current/functions/aggregate.html] function is supported, we can write concisely.
> However, Spark does not support yet, we need to write like {{count(case when some_condition then 1)}} or {{sum(case when some_condition then 1 end)}}, which looks painful.



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