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https://issues.apache.org/jira/browse/SPARK-39876?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-39876:
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Assignee: (was: Apache Spark)
> Unpivot / melt function for SQL
> -------------------------------
>
> Key: SPARK-39876
> URL: https://issues.apache.org/jira/browse/SPARK-39876
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 3.4.0
> Reporter: Enrico Minack
> Priority: Major
>
> With SPARK-38864 the Dataset API now has an unpivot / melt function. This
> should also be accessible through SQL statements, similar syntax as in
> [BigQuery|https://cloud.google.com/bigquery/docs/reference/standard-sql/query-syntax#unpivot_operator],
>
> [T-SQL|https://docs.microsoft.com/en-us/sql/t-sql/queries/from-using-pivot-and-unpivot?view=sql-server-ver15#unpivot-example],
> [Oracle|https://www.oracletutorial.com/oracle-basics/oracle-unpivot/].
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