"PUBLIC" is not recognized in some statements

[Paul Low]

Security is enabled. "PUBLIC" is not recognized as a user or role, but it is mainly used as a role name in some commands.

We should be consistent and be able to use it everywhere and also display it as a role name (or a user name).

Showddl and Get commands do not currently recognize "Public".

SQL>get component privileges on sql_operations for "public";

Privilege information on Component SQL_OPERATIONS for PUBLIC
============================================================

CREATE_SCHEMA
SHOW

--- SQL operation complete.

SQL>showddl user "PUBLIC";

*** ERROR[1333] User PUBLIC does not exist. [2015-03-03 12:11:54]

SQL>showddl role "PUBLIC";

*** ERROR[1338] Role PUBLIC is not defined in the database. [2015-03-03 10:44:15]

SQL>get roles;

Roles
=====

DB__ROOTROLE

--- SQL operation complete.

SQL>revoke component privilege "SHOW" on sql_operations from "public";

--- SQL operation complete.