301 - Schema metadata API refactor

[mpenick]

No description provided.

[mikefero]

For C* v1.2.x an 2.0.x cf_id does not exist resulting in the return of a uninitialized id_ (https://github.com/datastax/cpp-driver/pull/233/files#diff-f30001b0d6d7abd11f9acc768a8b0737R240); the CassUuid struct does not define a constructor to to initialize either. Should we define a CASS_UUID_INVALID in the API header and initialize CassUuid as the invalid define?

Or we could document that the meta id is only available for C* 2.1+.

[aholmberg]

I'm seeing some kind of corruption in the output of the example:

Error: Cannot add existing keyspace "examples"
Keyspace "annot ":
....
Table "schema_
              ":

The names of each are messed up. Just did some very basic debugging and they seem to be coming back correctly. Have not dug in further... posting here for corroboration.

[mpenick]

This landed with different commits because I updated the author.