HSQLDB binary format import

Tender approved in the budget by the TDF board


In order to remove the legacy Java / HSQLDB database completely, and move fully to Firebird in LibreOffice 5.4 it is necessary to be able to import old document data with high fidelity from the HSQLDB binary file format which we have used (for performance) inside so many of our existing ODB files. This task involves reading the existing (reasonably simple) Java serialization code, and writing an (import only) filter to import this data safely into base.

LibreOffice bug #106866 is now fixed : When I change the field length of the result is multiplied by 4 each time (firebird, varchar)

Bunth Tamás committed a patch related to issue #106866: query character size instead of bytes

It has been pushed to "master":

It will be available in 5.4.0. The patch should be included in the daily builds available at 

http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours.

More information about daily builds can be found at: http://wiki.documentfoundation.org/Testing_Daily_Builds 

Affected users are encouraged to test the fix and report feedback.