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 toIntervalMinute (children 1)
       ExpressionList (children 1)
        Literal UInt64_7
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier nnd