Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/7387#discussion_r34541982
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/conditionals.scala
---
@@ -311,7 +311,11 @@ case class CaseKeyWhen(key: Expression, branches:
Seq[Expression]) extends CaseW
}
}
-case class Least(children: Expression*) extends Expression {
+/**
+ * A function that returns the least value of all parameters.
--- End diff --
i think it's also important to explicitly say that "least value of all
parameters, skipping null values".
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