Thanks for the comments. I just updated the post with another script (gps.sql) that just prompts for the SQL_ID and adds the GATHER_PLAN_STATISTICS hint to it (via a Profile). A little more straight forward than the generic create_1_hint_sql_profile.sql script.

Kerry

I also like the idea of temporarily messing up stats to make sure they are affecting the XPLAN as expected.

A couple of more tools for my toolbox, thanks!

My dplan_allstats.sql script is just DBMS_XPLAN.DISPLAY_CURSOR with the ALLSTATS format option prompting for a sql_id and child_number (like so):

set lines 180
select * from table(dbms_xplan.display_cursor('&sql_id','&child_no','allstats'));

It won’t show the A-Rows column unless the statement was instructed to collect the extra information. This can be done by running with the GATHER_PLAN_STATISTICS hint or the session having statistics_level = all, or _rowsource_execution_statistics = true. You should get a note at bottom of the xplan output like so if you have not enabled the collection of the extended statistics.

Note
-----
   - Warning: basic plan statistics not available. These are only collected when:
       * hint 'gather_plan_statistics' is used for the statement or
       * parameter 'statistics_level' is set to 'ALL', at session or system level

Hope that helps.

Kerry

Regards,
Anand

Nice post, very informative.Where can i get dplan_allstats script?

Anand