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https://issues.apache.org/jira/browse/SPARK-15903?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lijie Xu updated SPARK-15903:
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Description:
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()
was:
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()
> 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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