| 摘要 |
A method for querying an Open Data Protocol ("opendata") opendata provider includes receiving a relational database query, parsing the relational database query, creating an execution plan, transmitting an opendata query to the opendata provider, transforming a response into a relational format, and providing the transformed response in reply to the relational database query. The method further includes mapping content of an opendata entity data model to a relational model catalog, and processing a portion of the execution plan by an opendata driver implemented at the server. The method can further include the server retrieving document metadata from the opendata provider, building an internal model of the document metadata, and responding to a metadata request. A system for implementing the method and a non-transitory computer readable medium are also disclosed. |
