SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function arrayJoin (alias x) (children 1)
     ExpressionList (children 1)
      Literal Array_[\'а\', \'я\', \'ё\', \'А\', \'Я\', \'Ё\']
   ExpressionList (children 1)
    OrderByElement (children 2)
     Identifier x
     Literal \'ru\'