> I needed to know some statistics like how much space is being used up
> by indexes and % of table fill-ups, average length of rows etc

Well, if the documentation doesn't list anything like this in the
system tables, that should give you a hint, no? This info
cannot be retrieved from the system tables - also, this information
has nothing to do with metadata!

You can get (parts of) this information by retreiving the statistics
with the command line tool "gstat" or via the Services API.
Most 3rd party tools - Database Workbench included - provide
a convenient interface for this.


With regards,

Martijn Tonies
Database Workbench - the developer tool for InterBase & Firebird
Upscene Productions
http://www.upscene.com