Github user leonfl commented on the issue:
https://github.com/apache/spark/pull/16486
@mrjrdnthms ,Yes, your understand is correct, in scala it like this:
```
val rows: RDD[Row] = df.rdd.map(
rowIn => {
// handle the rowIn and return a Row
}
)
val newDF = df.sqlContext.createDataFrame(rows, /*create the newDF
schema*/)
```
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