We just got a big update to the SAP HANA extension from SAP themselves. There's a couple of caveats. One, you have to build it yourself.
mvn package
Look in target for the jar and put it in your liqubase/lib directory.
Second caveat is that it currently works with 3.6.3. We are planning on it working with Liquibase 4.0 which is set for release in a few weeks.
So, check that out and let us know how it works regarding schema updates on HANA.
Liquibase does not diff data. Only schema. There are lots of other data diff tools out there. We do have plans to add that, but not in any timeframe that will help you now.
Cool? Let us know!