Where do I find help on HSQLDB

So having ported my data from MySQL to OOo Base, I now need to get my macros 
working. There are apparently some differences here, since what used to work 
with MySQL/ODBC now fails.

Specifically, I an getting 'table not found in statement' when trying to 
retrieve, though the table name is definitely correct. I have tried various 
permutations without success.

Is there some place where differences are documented?

Cheers,
TonyB