10.2.0.3 upgrade to 11.2.0.3 - code changes required?

Hi,
I'm soliciting general comments regarding experiences when upgrading from OWB 10g to 11g. After running the upgrade utility we have noticed numerous mapping sql code differences between 10g and 11g.
My questions for forum participants are:
1. Have you seen sql code differences after upgrading to 11g or is there a way to avoid this? (We would prefer to generate the same sql).
2. Have mapping re-writes been required post upgrade to generate 11g sql that produces the same result set and record count as 10g generated sql?
3. Have you noticed any mapping performance variation (run time) after upgrading to 11g?
Thanks for any insight,
-Tim

Which is the best approach for upgarde ?
APPS - 12.0.6
DB - 10.2.0.3
My DB Size is 400GB
1. DBUA
2. Export / Import utility
3. SQL Copy
Client cannot afford downtime .. we are getting approx 6 hrs to complete the task in PROD.DBUA should be the fastest one.
What is the approx time reuired?Depends on many factors (hardware resources, size of the database, ..etc). Please try this in a test instance to estimate the time it requires to do this upgrade.
Thanks,
Hussein

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Hi,
We are in the processes of upgrading the JDK versions on servers to JDK 1.4.2 to support other software upgrades.
The JDK versions on each of the servers are at different versions. On one of the servers, the version of JDK is currently at JDK 1.2.2_10. Can somebody please advise me if there would be any code changes required to support this upgrade (such as some methods being depreciated)?
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The rest depends on your application. The more complex it is, the more differences can be encountered. You certainly need to run a test cycle for it with the new platform.
From my experience, I can list some issues that I have read about or have experienced myself:
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http://edocs.bea.com/jrockit/geninfo/devapps/codeprac.html
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