latest

Whether the engine version is the most recent version matching the other criteria. This is different from default_only in important ways: "default" relies on AWS-defined defaults, the latest version isn't always the default, and AWS might have multiple default versions for an engine. As a result, default_only might not prevent errors from multiple RDS engine versions, while latest will. (latest can be used with default_only.) Note: The data source uses a best-effort approach at selecting the latest version. Due to the complexity of version identifiers across engines and incomplete version date information provided by AWS, using latest may not always result in the engine version being the actual latest version.