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https://issues.apache.org/jira/browse/SPARK-28646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17240455#comment-17240455
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Apache Spark commented on SPARK-28646:
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User 'beliefer' has created a pull request for this issue:
https://github.com/apache/spark/pull/30541
> Allow usage of `count` only for parameterless aggregate function
> ----------------------------------------------------------------
>
> Key: SPARK-28646
> URL: https://issues.apache.org/jira/browse/SPARK-28646
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.1.0
> Reporter: Dylan Guedes
> Priority: Major
>
> Currently, Spark allows calls to `count` even for non parameterless aggregate
> function. For example, the following query actually works:
> {code:sql}SELECT count() OVER () FROM tenk1;{code}
> In PgSQL, on the other hand, the following error is thrown:
> {code:sql}ERROR: count(*) must be used to call a parameterless aggregate
> function{code}
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