SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 3)
    Identifier query
    Function greater (alias async) (children 1)
     ExpressionList (children 2)
      Function arrayElement (children 1)
       ExpressionList (children 2)
        Identifier ProfileEvents
        Literal \'BackgroundLoadingMarksTasks\'
      Literal UInt64_0
    Function greater (alias sync) (children 1)
     ExpressionList (children 2)
      Function arrayElement (children 1)
       ExpressionList (children 2)
        Identifier ProfileEvents
        Literal \'MarksTasksFromCache\'
      Literal UInt64_0
   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 equals (children 1)
      ExpressionList (children 2)
       Identifier query_kind
       Literal \'Select\'
     Function notEquals (children 1)
      ExpressionList (children 2)
       Identifier type
       Literal \'QueryStart\'
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier event_time_microseconds
 Identifier Vertical
