Is there a way to stop a query just after the cursor/plan is produced by CBO?

Following suggestions of Kerry Osborne&#8217;s Oracle Blog &raquo; Blog Archive &raquo; Explain Plan Lies &#8211; Kerry Osborn…
on the lies of "Explain plan" (and of "set autotrace on" too) I'd like to try to stop a query/DML before actually it starts, just after the plan was produced and sql_id assigned.
Is there any CLEAN way (other than trying CTRL-C) to do that?
Thanks
Paolo

Hi
PaolFili wrote:
Thanks rp.
I think my question is a little dofferent, but your reply give me an idea.(which has clear disadvantages , but can do the work).
The problem is obtain in Lybrary Cache a plan,a SLQ_ID,PLAN_HASH for a query ( i.e. a 10days running query) that I cannot start-up.
So my (suggested from your reply) idea is:
1) to LOCK EXCLUSIVE (a table level) , **if it's possible** every table accessed in the query ( Yes, it can be really expansive in some production environment, but sometimes can be necessary ..)
using : LOCK TABLE table IN EXCLUSIVE MODE
for each table accessed from query
2) Startup the query that will be suspended form the lock on tables accessed + kill the sid,serial#,@Inst_id for the query.
3) UNLOCK tables from EXCLUSIVE using "ROLLBACK" in the session where LOCK TABLE.... was send.(to remake tables to work for other queries)
Any other ideas?
Thanks
Paolo
you're planning on using locks to stop a query and you think in order to do so you need exclusive locks on every table accessed in the query? And you are prepared to do that on a production system?
And all of this is needed to troubleshoot a query that was running for 10 days -- i.e. a query that was available for all kinds of diagnostics during 10 days?
Sorry, I think it wasn't a good idea for you to read that Osborne's blog post -- you should've started with more basic things. Way more basic.
Best regards,
Nikolay

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Is there a way to stop a query just after the cursor/plan is produced by CBO?

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