Negative ROW_WAIT_OBJ#

I am monitoring one of the SQL session which is having a long running SQL . In order to identify the object in wait I am using the below SQl against v$session and I am getting a negative obj#. What does this mean? Can someone

select sid,serial#,event,ROW_WAIT_OBJ#,status,seq#,seconds_in_wait from v$session where sid=400;

  SID    SERIAL# EVENT                                ROW_WAIT_OBJ# STATUS
        SEQ# SECONDS_IN_WAIT


---------- ---------- ------------------------------------ -------------


-------- ---------- ---------------


       400      16615 db file scattered read                   -40002177
ACTIVE          497              25

BR,
RRA
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http://www.freelists.org/webpage/oracle-l Received on Fri Jan 03 2020 - 14:31:59 CET