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From rob <fury...@gmail.com>
Subject Re: Update from 10.7 to 10.8
Date Tue, 14 Jun 2011 18:30:23 GMT
Hi,

thanks for the answer and the link.

I have one more question: connecting to a derby database how can i
know its version?

Thanks

On 13 June 2011 22:28, Kathey Marsden <kmarsdenderby@sbcglobal.net> wrote:
> On 6/13/2011 1:13 PM, rob wrote:
>>
>> Hi,
>>
>> sorry for the question,  i am new to derby, i have some databases
>> created with derby 10.7, i would like to update to 10.8, my doubt is :
>> can i always open a database created with 10.7 with the 10.8
>> derby.jar?
>>
>> > From my tests seems ok, but just to be sure if someone more expert
>> than me can confirm this.
>>
>> I see, and this is ok, that the opposite is not possible, i cannot
>> open a database created with 10.8 with 10.7 because the format is
>> different.
>>
>> So there is some automatic format's conversion when you open a 10.7
>> database with 10.8?
>>
> Hi Rob,
>
> When you connect to your 10.7 database with a newer version  e.g. connect
> 'jdbc:derby:mydb' you are in what is called soft upgrade mode.  You can
> still run your existing application and go back to 10.7 but may not be able
> to use some new  features.
>
> If you connect with the upgrade=true attributed, e.g.
> 'jdbc:Derby:mydb;upgrade=true' , this is called hard upgrade. The database
> format will be changed to the newer version, any usage restrictions will be
> lifted  and you will not be able to go back to 10.7.
>
> see:
> http://wiki.apache.org/db-derby/UpgradingTen
>
> I am not sure if any of the 10.8 features specifically require hard upgrade,
> but generally I encourage users to perform hard upgrade once they have
> verified their application with the new version.    Moving forward it is the
> most recent version that will get the most rigorous upgrade testing.
>
> Kathey
>
>
>

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