We must be able to create a after row trigger on table (i.e., it should be not be
already available) After giving table privileges.
We cannot specify snapshot log name because oracle uses the name of the master table
in the name of the database objects that support its snapshot log. The master table
name should be less than or equal to 23 characters. (The table name created will
be MLOGS_tablename, and trigger name will be TLOGS name).