Disable/Enable Maintenance Jobs

Hi all!
A couple days ago a client asked me assistance to disable all the maintenance jobs on DB to run a critical process.

First considerations: We could just disable window changing, once the jobs are related to windows, and Resource Manager Plans use to be as well. However, to answer the question directly:

# To disable/enable all maintenance jobs in from/for all windows:

EXEC DBMS_AUTO_TASK_ADMIN.disable;
EXEC DBMS_AUTO_TASK_ADMIN.enable;

# And to disable/enable specific maintenance jobs from/for all windows:

exec DBMS_AUTO_TASK_ADMIN.DISABLE('AUTO OPTIMIZER STATS COLLECTION',NULL, NULL);
exec DBMS_AUTO_TASK_ADMIN.DISABLE('AUTO SPACE ADVISOR',NULL, NULL);
exec DBMS_AUTO_TASK_ADMIN.DISABLE('SQL TUNING ADVISOR', NULL, NULL);

exec DBMS_AUTO_TASK_ADMIN.ENABLE('AUTO OPTIMIZER STATS COLLECTION',NULL, NULL);
exec DBMS_AUTO_TASK_ADMIN.ENABLE('AUTO SPACE ADVISOR',NULL, NULL);
exec DBMS_AUTO_TASK_ADMIN.ENABLE('SQL TUNING ADVISOR', NULL, NULL);

More information and details about it can be taken from here: https://docs.oracle.com/cd/E11882_01/server.112/e25494/tasks.htm#ADMIN11836

Hope it helps. Cheers!