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Posted to issues@spark.apache.org by "Chaerim Yeo (JIRA)" <ji...@apache.org> on 2019/04/10 09:13:00 UTC

[jira] [Created] (SPARK-27425) SQL count_if functions

Chaerim Yeo created SPARK-27425:
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             Summary: SQL 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


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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