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max_string_size to help with a characterset change in Oracle 12c

edited Sep 26, 2014 7:34AM in Database Administration (MOSC) 5 commentsAnswered ✓

Oracle RDBMS 12.1.0.2

We are migrating from Oracle 11.1.0.7 to Oracle 12.1.0.2.  I've made the new character set on 12.1 AL32UTF8 because (1) I saw an Oracle recommendation that this is a good idea, and (2) if we employ containers and plug-ins at some point, it's required. 

So, I did it but now I'm having lots of trouble bringing in legacy applications that now have varchar2(4000) columns needed more.  One resolution would be to set max_string_size=extended and follow the rules to get that going.  That seems straightforward, but I'm looking for others with experience doing this.  What other troubles could pop up from doing this? 

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