Army wrote:
If I run ij with the latest trunk and try to use the "describe" command
on a database that was created in the 10.3 trunk prior to svn #496645, I
get an error (NoSuchMethodError). Revision 496645 was part of DERBY-2226.
My questions are:
1) Does anyone else see this peculiar behavior?
2) Does this matter? If I create the database with 10.2 and then
connect from the latest 10.3 the describe command works as expected. So
maybe this is just a side-effect from working on the development branch
and there's nothing more to worry about...?
What is happening is the stored compiled plan for the metadata query was
compiled against a set of classes that have since changed their
signature. Derby does handle this if the engine's release number does
not match the release the database was last booted as, e.g. a change
from 10.2.1.5 to 10.2.1.6 will force recompiling of stored plans. This
is how changes in a branch are handled.
I don't think it matters, the development trunk is just that a
development trunk. Trying to ensure the current trunk worked against any
previous version of a database created by the development trunk I think
is too much work. Handling upgrade at defined boundaries is hard enough :-)
Dan.
