SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function ignore (children 1)
     ExpressionList (children 1)
      Function blockSerializedSize (children 1)
       ExpressionList (children 1)
        Literal Tuple_(UInt64_1, UInt64_1)