case CommandInterface.ALTER_USER_RENAME:
session.getUser().checkAdmin();
if (db.findUser(newName) != null || newName.equals(user.getName())) {
throw DbException.get(ErrorCode.USER_ALREADY_EXISTS_1, newName);
}
db.renameDatabaseObject(session, user, newName);
break;
case CommandInterface.ALTER_USER_ADMIN:
session.getUser().checkAdmin();
if (!admin) {
user.checkOwnsNoSchemas();