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https://issues.apache.org/jira/browse/SPARK-27425?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-27425.
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Resolution: Fixed
Fix Version/s: 3.0.0
Issue resolved by pull request 24335
[https://github.com/apache/spark/pull/24335]
> 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
> Assignee: Chaerim Yeo
> Priority: Minor
> Fix For: 3.0.0
>
>
> 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 END)}} or {{SUM(CASE WHEN some_condition THEN 1 END)}},
> which looks painful.
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