Any way is fine - console, web interface, programmatically...
I was unable to find the DB version in the web interface yet and even the jars in the {$JBOSS_HOME}/common/lib don't have the version in the filename.
The JBoss version is 5.1 EAP
Thank you
If you go to where the HSQLDB database is stored:
{$JBOSS_HOME}/Server/XXX/data/hypersonic
and open the localDB.properties file, at the top it will have the version, like this:
#HSQL Database Engine 1.8.0.8