How to set up a post-startup trigger on RDS Oracle 19c?

Question

We have an instance running with Oracle Edition-Based Redefinition (EBR). Following an outage, say to apply the quarterly security patches, a post-startup trigger is required in order to execute a PLSQL package automatically. 
Our code is
`DROP TRIGGER RDSADMIN.RDS_DDL_TRIGGER2;
CREATE OR REPLACE TRIGGER RDSADMIN.RDS_DDL_TRIGGER2
BEFORE DDL ON DATABASE
BEGIN
        rdsadmin_trigger_util.secure_ddl;
END;
/
SHOW ERRORS;`

And we're raising the following error:
`[Error] Compilation (3: 7): ORA-04088: error during execution of trigger 'RDSADMIN.RDS_DDL_TRIGGER2'
ORA-00604: error occurred at recursive SQL level 1
ORA-20900: RDS restricted DDL found: CREATE TRIGGER SYS.EDITION_SERV_START
ORA-06512: at "RDSADMIN.RDSADMIN_TRIGGER_UTIL", line 756
ORA-06512: at line 2`

Any insight would be appreciated.

Answer

You can try to solve this problem two different ways:

1. Use an AWS CloudFormation custom resource to call an AWS Lambda function to run post-database creation steps on the Amazon RDS for Oracle DB instance right after creation or restoration from a snapshot
2. Use Amazon Elastic Compute Cloud (Amazon EC2) as a temporary instance to connect with the RDS for Oracle database to run post-database creation steps on the RDS for Oracle DB instance right after creation or restoration from a snapshot

Reference : https://aws.amazon.com/blogs/database/automate-post-database-creation-scripts-or-steps-in-an-amazon-rds-for-oracle-database/

How to set up a post-startup trigger on RDS Oracle 19c?

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