This operator retrieves data from a remote data source.
Operator name: RPD
Represents: An operator used in the federated system to retrieve data from a remote data source via a non-relational wrapper.
This operator is considered by the optimizer when it contains a remote plan that will not be inspected by the optimizer. An RPD operator sends a request to a remote non-relational data source to retrieve the query result. The request is generated by the non-relational wrapper using the API supported by the data source.