SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Identifier one.dummy
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier one (alias A)
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      Subquery (alias B) (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Literal UInt64_0 (alias dummy)
     TableJoin (children 1)
      ExpressionList (children 1)
       Identifier dummy