SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 2)
    Identifier id
    Function uniqMerge (children 1)
     ExpressionList (children 1)
      Identifier city_name_uniq
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier users2
   ExpressionList (children 1)
    Identifier id
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier id
