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Impact on apps of migration from Oracle 8 to 10g

Maria Anderson EXPERT RESPONSE FROM: Maria Anderson

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QUESTION POSED ON: 29 May 2007
We would like to migrate our database from Oracle 8.1.7 to Oracle 10g. We would like to know the impact for our application developed using Delphi and our other components. How can we find out whether Oracle 10g will support the features in the other components or not?

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EXPERT RESPONSE

I am going to point you to two similar questions I answered last week:

Are Oracle 10g and VB 6.0 compatible?
Impact of Oracle 9i upgrade on Java front end

The only difference between your question and the previous one is that they are using VB 6, whereas your applications were created in Delphi.

It would be nearly impossible for me to predict what types of application issues you will encounter when you upgrade to Oracle 10g. I have no information about your application, the data or how it's used. The common theme (and the message I keep repeating to others with this type of question) across these questions is that you must test your upgrade in a non-production environment. The testing must be documented, thorough, and involve your application support folks as well as business users. As well, the upgrade process (especially one like this that is taking a database from Oracle8i to 10g) must be repeated several times, each time with extensive testing. Time spent testing is never wasted!


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