Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/6871#discussion_r32795711
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/math.scala
---
@@ -258,6 +258,10 @@ case class Pow(left: Expression, right: Expression)
case class Logarithm(left: Expression, right: Expression)
extends BinaryMathExpression((c1, c2) => math.log(c2) / math.log(c1),
"LOG") {
+
+ /**
+ * Natural log, i.e. using e as the base.
+ */
def this(child: Expression) = {
this(EulerNumber(), child)
}
--- End diff --
I think that's a good idea. Can you fix it in your pr? I'm gonig to merge
this one first.
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