Sorry, that's backwards.  Changes to the minor version are upwards 
compatible -- a new engine can work against an older database.  If a 
change is backwards compatible, there is no reason to change the ODS 
version at all.

On 12/24/2014 10:33 AM, Dimitry Sibiryakov wrote:
>     Hello, All.
>
>     AFAIU, minor ODS changes are supposed to be backward compatible: 
> additional fields in
> system tables, additional indexes and so on. Such changes raise minor ODS 
> version, right?
>     I.e. old engines for the same major version should work ok with databases 
> created by
> newer engines, but not contrary, because new engines require these new fields.
>     Am I wrong?
>


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