Sql of the blocker history

Hi
Oracle 10g.
Lets say, I experienced a database lock 2 hours ago and I want to find which sql statement was blocking others.
I know the sid of the blocker but I am unable to find the sql statement of the blocker.
Also, when I check enterprise manager top activity only shows the waiter.
I tried to run the queries from below link, but it only shows the information about the waiting session.
http://oraclue.com/2009/10/15/blocking-locks-history/
How can I find the sql statement of the particular sid from history ?

Ora_83 wrote:
Lets say, I experienced a database lock 2 hours ago and I want to find which sql statement was blocking others.
I know the sid of the blocker but I am unable to find the sql statement of the blocker.
Also, when I check enterprise manager top activity only shows the waiter.
I tried to run the queries from below link, but it only shows the information about the waiting session.
http://oraclue.com/2009/10/15/blocking-locks-history/
How can I find the sql statement of the particular sid from history ?Generally speaking, there is no way. There is no direct link available between the lock and the statement. Any SQL-driven solution to the probably is depending on luck, or a little guesswork, and may give no answer or a false positive. For a simple demo to make the point see: http://jonathanlewis.wordpress.com/2009/04/19/locking-sql/
Regards
Jonathan Lewis

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