SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Identifier x
    Identifier n
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Literal Array_[\'а\', \'я\', \'ё\', \'А\', \'Я\', \'Ё\'] (alias arr)
    TablesInSelectQueryElement (children 1)
     ArrayJoin (children 1)
      ExpressionList (children 2)
       Identifier arr (alias x)
       Function arrayEnumerate (alias n) (children 1)
        ExpressionList (children 1)
         Identifier arr
   ExpressionList (children 2)
    OrderByElement (children 2)
     Identifier x
     Literal \'ru\'
    OrderByElement (children 1)
     Identifier n