SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function equals (children 1)
     ExpressionList (children 2)
      Function URLHash (children 1)
       ExpressionList (children 2)
        Identifier url
        Literal UInt64_2 (alias level)
      Function URLHash (children 1)
       ExpressionList (children 1)
        Function arrayElement (children 1)
         ExpressionList (children 2)
          Function URLHierarchy (children 1)
           ExpressionList (children 1)
            Identifier url
          Function plus (children 1)
           ExpressionList (children 2)
            Identifier level
            Literal UInt64_1
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.one
    TablesInSelectQueryElement (children 1)
     ArrayJoin (children 1)
      ExpressionList (children 1)
       Literal Array_[\'\', \'http://ya.ru\', \'http://ya.ru/\', \'http://ya.ru/a\', \'http://ya.ru/a/\', \'http://ya.ru/a/b\', \'http://ya.ru/a/b?\'] (alias url)