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$ORACLE_HOME/rdbms/admin/utlxpls.sql

utlxpls.sql is an SQL script to display the plan table output for serial processing.
The executable content of this script is quite simple: 
set markup html preformat on
select plan_table_output from table(dbms_xplan.display('plan_table',null,'serial'));

See also

utlxplp.sql is a similar script, but for parallel execution processing.

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