SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 3)
    Identifier ts
    Identifier metric
    Function nonNegativeDerivative (alias deriv) (children 1)
     ExpressionList (children 3)
      Identifier metric
      Identifier ts
      Function toIntervalHour (children 1)
       ExpressionList (children 1)
        Literal UInt64_8
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier nnd