Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/21240#discussion_r186263952
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/generators.scala
---
@@ -222,6 +223,51 @@ case class Stack(children: Seq[Expression]) extends
Generator {
}
}
+/**
+ * Replicate the row based N times. N is specified as the first argument
to the function.
--- End diff --
nit: `Replicate N times the row.`?
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