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From Francois Eyl <>
Subject Re: Best practice to support multiple database vendors (DB2 or MSSQL Server)
Date Fri, 14 Oct 2011 13:11:26 GMT
Ok, that's what I was wondering, but wasn't sure because of all DBEntity 
attributes that seem to be specific to database's vendor (CHAR vs NCHAR 

I'll try to connect to the MSSQL database using the appropriate JDBC 
driver and see.


On 14/10/2011 14:39, Aristedes Maniatis wrote:
> On Fri Oct 14 23:27:33 2011, Francois Eyl wrote:
>> Hi guys,
>> I'm using Cayenne on my project in order to interface it with a third 
>> party application through its database. Until now, the database was a 
>> DB2 (AS400), but the application now supports MS SQL Server as well. 
>> So, I need to support both DB2 and MSSQL Server of course. The 
>> databases schemas are stricly the same.
>> I wonder what is the best way to achieve this, knowing that I already 
>> have my datamap & datanode ready for DB2. I'd like to avoid 
>> redefining ObjectEntities by implementation (one set of data for DB2 
>> and another for SQLServer). How do you recommand me to proceed?
>> Do I need to create an other DataDomain, and "duplicate" the 
>> definition stuff?
>> Thanks in advance,
>> Francois
> In most cases, there is absolutely nothing to do at all. Just connect 
> to the database of your choice and Cayenne will make it all work.

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