AlterQuery  mt (children 3)
 ExpressionList (children 1)
  AlterCommand UPDATE (children 2)
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier n
     Literal UInt64_1
   ExpressionList (children 1)
    Assignment s (children 1)
     Subquery (children 1)
      SelectWithUnionQuery (children 1)
       ExpressionList (children 1)
        SelectQuery (children 3)
         ExpressionList (children 1)
          Function toString (children 1)
           ExpressionList (children 1)
            Function groupArray (children 1)
             ExpressionList (children 1)
              Function tuple (children 1)
               ExpressionList (children 1)
                Asterisk
         TablesInSelectQuery (children 1)
          TablesInSelectQueryElement (children 1)
           TableExpression (children 1)
            TableIdentifier system.zookeeper
         Function equals (children 1)
          ExpressionList (children 2)
           Identifier path
           Literal \'/\'
 Identifier mt
 Set