[GitHub] flink pull request #6223: [FLINK-9688] ATAN2 sql function support

[fhueske]

Github user fhueske commented on a diff in the pull request:

    https://github.com/apache/flink/pull/6223#discussion_r199504092
  
    --- Diff: 
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/expressions/mathExpressions.scala
 ---
    @@ -243,6 +243,16 @@ case class Atan(child: Expression) extends 
UnaryExpression {
       }
     }
     
    +case class Atan2(left: Expression, right: Expression) extends 
BinaryExpression {
    --- End diff --
    
    No input validation? override `expectedTypes` or `validateInput()`


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