I know that TrackStudio used special measures to split long strings into 2KB chunks.

I don't know if that is an issue but i checked a bit

http://pastebin.com/WVkbY3s9 is main xwiki.hbm.xml
I pasted it into http://xpath.me/

And those queries return some interes results, that i don;t know mapped to what.

>> //*[@length>2000][@type="text"] << this i hope just create a BLOB, and hopefully not used it for grouping an such
>> //*[@length>2000][@type!="text"]" << but this... what it might be...

Those query seems to return nothing, so i think :

>> //*[string-length(@table)>30] <<
>> //*[string-length(@column)>30] <<
>> //*[string-length(@index)>30] <<

No generator seem to have name, yet i dunnot if it matters or not.
It seems to me SQL not generated to create database...