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https://issues.apache.org/jira/browse/SPARK-34268?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-34268:
------------------------------------
Assignee: Apache Spark
> The Signature for ConcatWs in Spark SQL Docs Is Inconsistent with the Actual
> Behavior
> -------------------------------------------------------------------------------------
>
> Key: SPARK-34268
> URL: https://issues.apache.org/jira/browse/SPARK-34268
> Project: Spark
> Issue Type: Bug
> Components: docs
> Affects Versions: 3.2.0
> Reporter: Yuning Zhang
> Assignee: Apache Spark
> Priority: Major
>
> In [https://spark.apache.org/docs/latest/api/sql/index.html#concat_ws], the
> signature of concat_ws is concat_ws(sep, [str | array(str)]+). However, it
> doesn't actually need any str or array(str) arguments. Only having the sep
> argument seems to work.
> For example, `select concat_ws("a")` returns an empty string.
> {code:java}
> scala> sql("""select concat_ws("a")""").show
> +------------+
> |concat_ws(a)|
> +------------+
> | |
> +------------+
> {code}
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