Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/15513#discussion_r84573688
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala
---
@@ -62,7 +66,11 @@ case class UnaryMinus(child: Expression) extends
UnaryExpression
}
@ExpressionDescription(
- usage = "_FUNC_(a) - Returns a.")
+ usage = "_FUNC_(expr) - Returns the positive value of expr.",
--- End diff --
Nit: I would just say "Returns the value of expr". Unary plus doesn't do
anything. This sort of sounds like it makes the value positive.
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