Transparent Table changes

1. Changes to active transparent tables: The type for the non-key field is to be changed from NUMC to CHAR. What follow up actions are to be expected?

2. Can we buffer database view table? Does it exist in the underlying database in R/3? Can we insert, change, modify data into database view table?

3. How database view is different from logical database?

4. Performance wise which one will be better and why?

Regards,

Mau