Oracle Patches

Tables: AD_APPLIED_PATCHES , AD_BUGS( bug number is the patch number)

Links:
Note: 181665.1 - Release 11i Adpatch Basics
https://metalink2.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=181665.1

Note: 457566.1 - Oracle Applications Patching FAQ for Release 11i -- Can I determine ahead of time how a patch will affect my system?
https://metalink2.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=457566.1

Oracle Applications Maintenance Utilities -- 11i
http://download.oracle.com/docs/cd/B25516_18/current/acrobat/11iadutil.pdf

Oracle Applications Maintenance Utilities -- R12
http://download.oracle.com/docs/cd/B40089_09/current/acrobat/r12adutil.pdf


How can I track my customizations? What happens to my customizations during patching?

You should apply patches first on a test system. Then, review the changes in the test system and identify the best way to re-integrate customizations affected by the patch.

If you have registered your customized files in $APPL_TOP/admin/applcust.txt, AutoPatch reviews the files to determine if any of those files will be replaced during the application of the patch.