Lijie Xu created SPARK-15903:
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Summary: Support AllColumn expression in UDF functions
Key: SPARK-15903
URL: https://issues.apache.org/jira/browse/SPARK-15903
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 1.6.1
Reporter: Lijie Xu
Priority: Minor
Sometimes, we want to put all the columns in the UDF functions such as
"concat()". We would like to use simple $"*" instead of listing each column as
follow.
val df = sc.makeRDD(Array((1, "A"), (2, "B"), (3, "C"))).toDF("Id", "Name")
val result = df.select($"*", concat($"*").as("UDF")) // failed
val result = df.select($"*", concat($"Id", $"Name").as("UDF")) // passed
result.show()
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