correct downgrade path, downgrade db home from 11.2.0.4.160119(21948347,21948348) to 11.2.0.4.2(1803

Hi MOSC,

We need to downgrade a db home in our ODA X3-2 from 11.2.0.4.160119(21948347,21948348)  to  11.2.0.4.2(18031668):

11.2.0.4.160119(21948347,21948348)

downgrade to:

11.2.0.4.2(18031668)

We'd like to make sure we have them correct as well as the correct db patch version's zip file (Patch 18031668) to downgrade from 11.2.0.4.160119(21948347,21948348) and then patch to 11.2.0.4.2(18031668).

Here are our general sequential steps.

0) download: Patch 18031668: DATABASE PATCH SET UPDATE 11.2.0.4.2 (INCLUDES CPUAPR2014)

     aka "p18031668_112040_LINUX.zip", move to /tmp

1) as grid or root shutdown all oracle services:

crsctl check crs

crsctl stop crs

2) as oracle, set up the environment:

export ORACLE_HOME=/u01/app/oracle/product/11.2.0.4/dbhome_1

export PATH=$PATH:$ORACLE_HOME/OPatch