I've just committed additional enhancements to DB2 support in MediaWiki as r106480. This builds on the code developed by André and other student volunteers at Minho University which I committed in April as r85885.
I'm hoping that this will make the 1.19 cutoff, as it includes updates to the DB2 database schema to address changes in 1.18 and 1.19. I think the changes are reasonable, and I've done my best to look the code over for clarity and adherence to style guidelines before committing.
Regards,
Leons Petrazickis http://lpetr.org/blog/