Enrico Minack created SPARK-39876:
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Summary: 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
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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