SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function if (alias country) (children 1)
     ExpressionList (children 3)
      Function isNull (children 1)
       ExpressionList (children 1)
        Identifier t0.country
      Identifier t2.country
      Identifier t0.country
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier without_nullable (alias t0)
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier with_nullable (alias t2)
     TableJoin (children 1)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier t0.country
        Identifier t2.country
   ExpressionList (children 1)
    OrderByElement (children 1)
     Literal UInt64_1
