Query on flashback_transaction_query table taking ridiculously long time

Question

Oracle 10.2.0.3.0 on Solaris :
I am trying to use Flashback Transaction Query table to track transactions and generate the undo_sql within a time period for an entire schema using the following sql :
SELECT XID,START_SCN,COMMIT_SCN,OPERATION,TABLE_NAME,TABLE_OWNER,LOGON_USER,UNDO_SQL
FROM flashback_transaction_query
WHERE start_timestamp >= TO_TIMESTAMP ('2007-08-16 11:50:00AM','YYYY-MM-DD HH:MI:SSAM')
AND start_timestamp <= TO_TIMESTAMP ('2007-08-16 11:55:00AM','YYYY-MM-DD HH:MI:SSAM')
AND TABLE_OWNER = 'JEFFERSON';
None of my attempts to run this query has succeeded so far as it keeps executing and executing that never seems to end.
The highest I waited is 50 minutes before cancelling it.
I did read thru metalink doc id 270270.1 (which I think is close), however, the solution is not relevant to the requirement I have.
Any suggestions would be of help. Thanks

Answer 1

I found that if I did the following:
select t2.*
from
  select taddr
  from v$session
  where username = <username>
  ) t1
  inner join
  v$transaction t2
  on t1.taddr = t2.addr
/... and used the XID value in this:
select *
from flashback_transaction_query
where xid = hextoraw('< the value of XID from above');... that it would come back fast.
But even then, I would have to wait a little bit before the update statement seemed to register elsewhere in the database. There was a delay. But once the update seemed to register -- and you reselected -- it was fast.
I had no luck using those other columns in 10.1.0.5.
I also ran DBMS_STATS.GATHER_FIXED_OBJECT_STATS and DBMS_STATS.GATHER_DICTIONARY_STATS but I do not know if they changed anything or if I just was not waiting long enough for the statement to register.