Database Install/Upgrade/Opatch (MOSC)

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Is it safe to run 12cR2 preupgrade tool if not upgrading yet?

edited Mar 2, 2018 9:02AM in Database Install/Upgrade/Opatch (MOSC) 3 commentsAnswered ✓

Hi, I guess the answer is yes, but I wanted to make sure.

Can I safely run the 12cR2 preupgrade tool on a 10gR2 (production) database that will be upgraded?

I ask because I see the tool creates at least 2 packages (DBMS_PREUP and DBMS_REGISTRY_EXTENDED), a directory object (PREUPGRADE_DIR), and also alters registry$database (adds column TZ_VERSION).  There could other changes not so obvious.  I just want to be sure none of those changes will affect the normal operation of the database (backups, exports/imports, etc.), while we get it ready for the upgrade to the new version.

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