sp_set_qplan

Changes the text of the abstract plan of an existing plan without changing the associated query.

sp_set_qplan id, plan

sp_set_qplan 563789159, 
        "( g_join (scan t1) (scan t2))"

Use sp_set_qplan to change the abstract plan of an existing plan. You can specify a maximum of 255 characters for a plan. If the abstract plan is longer than 255 characters, drop the old plan with sp_drop_qplan, then use create plan to create a new plan for the query.
When you change a plan with sp_set_qplan, plans are not checked for valid abstract plan syntax and the plan is not checked for compatibility with the SQL text. Immediately check all plans modified with sp_set_qplan for correctness by running the query for the specified ID.
To find the ID of a plan, use sp_help_qpgroup, sp_help_qplan or sp_find_qplan. Plan IDs are also returned by create plan and are included in showplan output.

The permission checks for sp_set_qplan differ based on your granular permissions settings.

Granular permissions enabled

With granular permissions enabled, you must be a user with manage abstract plans privilege.

Any user can execute sp_set_qplan to change the text of a plan for which they own.

Granular permissions disabled

With granular permissions disabled, you must be the database owner or a user with sa_role.

Any user can execute sp_set_qplan to change the text of a plan for which they own.

Values in event and extrainfo columns from the sysaudits table are:

Event	Audit option	Command or access audited	Information in extrainfo
38	exec_procedure	Execution of a procedure	Roles – Current active roles Keywords or options – NULL Previous value – NULL Current value – NULL Other information – All input parameters Proxy information – Original login name, if set proxy in effect