# Considerations for Amazon RDS for Db2 stored procedures
<a name="db2-stored-procedures-considerations"></a>

Before using the Amazon RDS system stored procedures for RDS for Db2 DB instances running the Db2 engine, review the following information:
+ Before running the stored procedures, you must first connect to the `rdsadmin` database as the master user for your RDS for Db2 DB instance. In the following example, replace *master\$1username* and *master\$1password* with your own information.

  ```
  db2 "connect to rdsadmin user master_username using master_password"
  ```
+ The stored procedures return the `ERR_MESSAGE` parameter, which indicates whether the stored procedure ran successfully or not and why it didn't run successfully.

  **Examples**

  The following example indicates that the stored procedure ran successfully.

  ```
  Parameter Name : ERR_MESSAGE
  Parameter Value : -
  Return Status = 0
  ```

  The following example indicates that the stored procedure didn't run successfully because the Amazon S3 bucket name used in the stored procedure wasn't valid.

  ```
  Parameter Name : ERR_MESSAGE
  Parameter Value : Invalid S3 bucket name
  Return Status = -1006
  ```

  For error messages returned when calling stored procedures, see [Stored procedure errors](db2-troubleshooting.md#db2-troubleshooting-stored-procedures).

For information about checking the status of a stored procedure, see [rdsadmin.get\$1task\$1status](db2-user-defined-functions.md#db2-udf-get-task-status).