RDS Oracle 19c database - Grant DBMS_XA

When you create an Amazon RDS for Oracle database instance, the default master user is created and granted the maximum user permissions on the DB instance with some limitations. Use this account for any administrative tasks, such as creating additional user accounts in the database. Because Amazon RDS is a managed service, SYS and SYSTEM users can't be used by default.

Please check this Knowledge Center Article : https://aws.amazon.com/premiumsupport/knowledge-center/rds-oracle-user-privileges-roles/

**Example: **

SQL> GRANT SELECT ON SYS.DBA_TABLESPACE_USAGE_METRICS to EXAMPLE-USERNAME; GRANT SELECT ON SYS.DBA_TABLESPACE_USAGE_METRICS to EXAMPLE-USERNAME * ERROR at line 1: ORA-01031: insufficient privileges

SQL> EXECUTE rdsadmin.rdsadmin_util.grant_sys_object( p_obj_name => 'DBA_TABLESPACE_USAGE_METRICS', p_grantee => 'ADMIN', p_privilege => 'SELECT', p_grant_option => true);