Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/5383#discussion_r28205759
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/Generate.scala ---
@@ -75,9 +78,15 @@ case class Generate(
outputRows.map(or => joinProjection(joinedRow(row, or)))
}
}
+ }.mapPartitions { iter =>
+ val nullOriginalRow =
Row(Seq.fill(generator.output.size)(Literal(null)): _*)
--- End diff --
My mistake, I see you're building the `Row`. But here we should use
`child.output.size` rather than `generator.output.size`. Also we can use
`Row.fromSeq` instead of `Row.appy(values: Any*)` for clarity:
```scala
val nullOriginalRow = Row.fromSeq(Seq.fill(child.output.size)(Literal(null))
```
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