Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/19729#discussion_r150477798
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala
---
@@ -604,6 +604,8 @@ case class Least(children: Seq[Expression]) extends
Expression {
val evalChildren = children.map(_.genCode(ctx))
val first = evalChildren(0)
--- End diff --
I am sorry that I cannot understand your opinion.
Could you please explain how your opinion works in the case that all of
childrens with `ev.value = -2` and `ev.isNull = false` for `Greatest` by using
`ctx.defaultValue`?
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