Re: Spd 19c adaptive statistics

My understanding is sql ppm directives are not sql/sql_id based rather expression based.. A spd can be used by more than one sql..

On Jan 5, 2021, at 7:36 PM, Mladen Gogala <gogala.mladen_at_gmail.com> wrote:



Of course you can do that. You should joing DBA_HIST_SQL_PLAN and DBA_SQL_PLAN_DIRECTIVES. Have you tried that?

Regards

On 1/5/21 7:26 PM, Moustafa Ahmed wrote: Still my question is

I know I can tell from dbms_xplan cutsor note section but is there a bulk way to check history on dba_hist_xxx views to expose the note section and see if it was ever used?  And I’m not able to find the answer there..

On Jan 5, 2021, at 7:06 PM, Mladen Gogala <gogala.mladen_at_gmail.com><mailto:gogala.mladen_at_gmail.com> wrote:



Tim Hall to the rescue:

https://oracle-base.com/articles/12c/sql-plan-directives-12cr1

There is also a good article in DBA hell:

http://dbaparadise.com/2018/03/what-are-sql-plan-directives/

And my favorite is Lodovico Caldera:

http://www.ludovicocaldara.net/dba/sql-plan-directives-problem/

Finally, there is a little known and infrequently visited site at https://support.oracle.com:

How to Identify Specific SQL Plan Directives In Use For A SQL Statement (Doc ID 2390551.1)

Happy New Year

On 1/5/21 6:32 PM, Moustafa Ahmed wrote:

I know I can tell from dbms_xplan cutsor note section but is there a bulk way to check history on dba_hist_xxx views to expose the note section and see if it was ever used?

--

Mladen Gogala
Database Consultant
http://mgogala.byethost5.com

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Mladen Gogala
Database Consultant
http://mgogala.byethost5.com
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http://www.freelists.org/webpage/oracle-l Received on Wed Jan 06 2021 - 01:53:54 CET