Is the `Engine` property optional for the `AWS::RDS::DBCluster` resource?

aws-cloudformation / aws-cloudformation-resource-providers-rds

The CloudFormation Resource Provider Package For Amazon Relational Database Service

https://aws.amazon.com/rds/

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Is the `Engine` property optional for the `AWS::RDS::DBCluster` resource? #494

Closed nikpivkin closed 8 months ago

nikpivkin commented 8 months ago

The documentation says that the Engine property is optional. Then what is the default value and why is the engine parameter required in AWS CLI and terraform?

dbbh commented 8 months ago

When restoring your DBCluster or creating a ReadReplica, the Engine will be inherited from the source DBCluster.