SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function countSubstringsCaseInsensitiveUTF8 (children 1)
     ExpressionList (children 2)
      Literal \'рф.подстрока.рф\'
      Literal \'рф\'