Expose getters from CREATE statements

[chibenwa]

Hello from Apache James.

Apache James runs a Cassandra backend and we uses a light and modular table declaration system allowing aggregating tables defined everywhere in the code. It just wraps com.datastax.oss.driver.api.querybuilder.schema.CreateTableWithOptions and allow dependency injection to do it's job.

We are able to create missing table and create them on the fly.

However we often add colomns onto existing tables and we currently fails at correcting it: admin needs to run the ALTER statement itself. And I would love to go from our table definitions and be able to asses if the existing table matches it - and see if we need to create extra coloms or not.

I was faced with 2 bad options:

• parse the create statement myself (brittle! Hacky!)
• Wrap the CreateTableWithOptions definition, rewrite the javadriver boiler plate doing so and modify my 31+ call sites and break the extensions of all our users.

I chose to try to contribute this upstream: being able to reliable describe the table that we wishes to operate on. To me at the very least this seems like a general need and is the minimal friction angle of attack to my problem.

If you have remarks I'm happy to make this work evolve.

Cheers,

Benoit