| 摘要 |
In one embodiment, a computer-implemented method comprises receiving a query in a controller. A data store stores data in a relational database. The database comprises a plurality of fields and a plurality of data elements. Each field is associated with a portion of the data elements. The database is arranged as at least one table, and the query identifies data of an object to be stored in a data set. The method further comprises determining, by the controller, whether the relational database includes a field associated with a class of the object; and if the relational database does not include a field associated with the class of the object, adding a column to the relational database, the added column having a field corresponding to the class. The method further comprises adding the data of the object to the relational database. |
