First you need to create the Custom Application in EBS R12.2 using:
- Creating a Custom Application in Oracle E-Business Suite Release 12.2 (Doc ID 1577707.1)
Then ensure you follow the standards of Custom Object Development and Deployment using:
- Developing and Deploying Customizations in Oracle E-Business Suite Release 12.2 (Doc ID 1577661.1)
Rest of the editioning specific activities are automtically taken care. Hope this helps.
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Yes, in the R12.2 upgrade process, a few activities will occur:
Public synonyms need to be dropped
Custom schemas need to get editioned
Custom tables will have edition views created and synonym for APPS will be created on the editioned view using an API called ad_zd_table.upgrade.
Yes, tables with the same name in different schemas with create a conflict in during APPS synonym since they will end up with the same synonym name in APPS.
Hope this helps.
This issues will be taken care during ADOP enablement phase .
Please run pre ADOP enablement script .
Please see below documents for more info
Using the Online Patching Readiness Report in Oracle E-Business Suite Release 12.2 (Doc ID 1531121.1)