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 coe_xfr_sql_profile.sql tips

Oracle Database Tips by Donald BurlesonMarch 23, 2015

Question:  How does  the coe_xfr_sql_profile.sql  work? 

Answer:  The coe_xfr_sql_profile.sql script by Carolos Sierra of Oracle Support forces a query to run using the same plan it had used on a previous tuning attempt to improve the query's performance.
 
The coe_xfr_sql_profile.sql  script generates another script that, in turn, contains the commands to create a manual custom SQL Profile out of a known plan that resides in RAM (library cache) or from the AWR dba_hist_sqlplan table.
 
The manual custom profile can be implemented into the same SOURCE system where the plan was retrieved, or into another similar TARGET system that has same schema objects referenced by the SQL that generated the known plan.
 
Here is the source code for coe_xfr_sql_profile.sql.  Bobby Durrett has a fantastic example of using coe_xfr_sql_profile.sql  to swap out a SQL execution plan.

   
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