SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 3)
    Literal \'t fj n\'
    Identifier t1.x
    Identifier t2.x
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t (alias t1)
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier nt (alias t2)
     TableJoin (children 1)
      ExpressionList (children 1)
       Identifier x
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier t1.x