I converted an Oracle 8.1.6 database running on AIX from US7ASCII to WE8ISO8859P15. My main reason for doing so was to get access to western European languages, and the Euro symbol. I didn't want to go all the way to UTF-8 because of the multi-byte issue and concerns about performance accessing the multibytes, even though we were only going to use single byte character encoding.

I experienced no problems using the Oracle DBD/DBI, but we did have trouble with BEA Weblogic. Apparently, they supported US7ASCII and UTF-8, but nothing in between. The problems were related to persistance data. The cookie data was garbled on certain characters, causing all sessions to non-persistant.

If you are using Weblogic, you may need to see if the latest version has been fixed!

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