I am looking at a way to export and import data from a Derby
database. Built into Derby itself is a tool which exports CSV or tab
delimited data, but this has a range of problems with binary data and
with compatibility across platforms and different databases, as well
as across upgrades of the schema.
Another option is to use Cayenne itself to perform the migration,
with an XML dataNode as the repository for the data. I know that EOF
does this sort of thing natively, but I don't believe XML datanodes
are available in Cayenne. Has anyone attempted something similar with
one of the JDBC-XML drivers (for example: https://xlsql.dev.java.net/)?
Speed is likely to be awful, but that is OK for this purpose. It also
comes to mind that this approach might be a great way to write unit
tests for our system, testing the code against a standard set of
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