eight, maybe nine years ago now, Jim's Falcon project was going to

be part of V6 which would actually provide pluggable back ends. 

MySQL had sort of claimed to be pluggable for several releases, but

the only backends that worked were MyISAM, InnoDB, or NDB - all

in house projects.  

MySQL's most recent release was 5.7.  They canned the whole V6

code base.  That's with an engineering group in the hundreds and 

a QA group beyond measure.  The Firebird engineers deserve great

credit for being able to move their code base into a modern and

manageable format.

Best regards,

Ann