masterUserPassword

The new password for the master user.

Changing this parameter doesn't result in an outage and the change is asynchronously applied as soon as possible. Between the time of the request and the completion of the request, the MasterUserPassword element exists in the PendingModifiedValues element of the operation response.

Amazon RDS API operations never return the password, so this operation provides a way to regain access to a primary instance user if the password is lost. This includes restoring privileges that might have been accidentally revoked.

This setting doesn't apply to the following DB instances:

• Amazon AuroraThe password for the master user is managed by the DB cluster. For more information, see ModifyDBCluster.

• RDS Custom

• RDS for Oracle CDBs in the multi-tenant configurationSpecify the master password in ModifyTenantDatabase instead.

Default: Uses existing setting

Constraints:

• Can't be specified if ManageMasterUserPassword is turned on.

• Can include any printable ASCII character except "/", """, or "@". For RDS for Oracle, can't include the "&" (ampersand) or the "'" (single quotes) character.

Length Constraints:

• RDS for Db2 - Must contain from 8 to 255 characters.

• RDS for MariaDB - Must contain from 8 to 41 characters.

• RDS for Microsoft SQL Server - Must contain from 8 to 128 characters.

• RDS for MySQL - Must contain from 8 to 41 characters.

• RDS for Oracle - Must contain from 8 to 30 characters.

• RDS for PostgreSQL - Must contain from 8 to 128 characters.