SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Function concat (alias symbol) (children 1)
     ExpressionList (children 3)
      Function addressToLine (children 1)
       ExpressionList (children 1)
        Function arrayJoin (alias addr) (children 1)
         ExpressionList (children 1)
          Identifier trace
      Literal \'#\'
      Function demangle (children 1)
       ExpressionList (children 1)
        Function addressToSymbol (children 1)
         ExpressionList (children 1)
          Identifier addr
   ExpressionList (children 1)
    Function greater (children 1)
     ExpressionList (children 2)
      Function count (children 1)
       ExpressionList
      Literal UInt64_0
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.trace_log (alias t)
   Function and (children 1)
    ExpressionList (children 2)
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier query_id
       Subquery (children 1)
        SelectWithUnionQuery (children 1)
         ExpressionList (children 1)
          SelectQuery (children 5)
           ExpressionList (children 1)
            Identifier query_id
           TablesInSelectQuery (children 1)
            TablesInSelectQueryElement (children 1)
             TableExpression (children 1)
              TableIdentifier system.query_log
           Function and (children 1)
            ExpressionList (children 3)
             Function equals (children 1)
              ExpressionList (children 2)
               Identifier current_database
               Function currentDatabase (children 1)
                ExpressionList
             Function like (children 1)
              ExpressionList (children 2)
               Identifier query
               Literal \'%test cpu time query profiler%\'
             Function notLike (children 1)
              ExpressionList (children 2)
               Identifier query
               Literal \'%system%\'
           ExpressionList (children 1)
            OrderByElement (children 1)
             Identifier event_time
           Literal UInt64_1
     Function like (children 1)
      ExpressionList (children 2)
       Identifier symbol
       Literal \'%Source%\'