SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Subquery (children 1)
     SelectWithUnionQuery (children 1)
      ExpressionList (children 1)
       SelectQuery (children 1)
        ExpressionList (children 1)
         Function throwIf (children 1)
          ExpressionList (children 1)
           Function plus (children 1)
            ExpressionList (children 2)
             Literal UInt64_1
             Identifier dummy