SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function minus (children 1)
     ExpressionList (children 2)
      Function max2 (children 1)
       ExpressionList (children 2)
        Literal NULL
        Literal UInt64_1
      Function min2 (children 1)
       ExpressionList (children 2)
        Literal NULL
        Literal UInt64_1
