With this it is possible to create user defined functions and aggregates and they are saved to disk and the schema change is propagated. It is just not possible to call them yet. Signed-off-by: Rafael Ávila de Espíndola <espindola@scylladb.com>
For now this just constructs the corresponding c++ classes. Signed-off-by: Rafael Ávila de Espíndola <espindola@scylladb.com>