SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 3)
    Literal UInt64_6
    Identifier n
    Identifier _part
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier rmt2
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier n