Saprk udf is how to convert the Column into type String-CodePudding

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Saprk udf is how to convert the Column into type String

Time：12-10

The import org. Apache. Spark. SQL. Functions provides the udf

Val upper: String=& gt; String=_. ToUpperCase

Val upperUDF=udf (upper)

Scala> The dataset. WithColumn (" upper ", upperUDF (' text)). The show

The udf code didn't understand, who can tell me?

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