Data Source Objects

OLE DB Programmer's Reference

In OLE DB, a data source object is a COM object through which a consumer connects to a provider's underlying data store.

It is important to distinguish a provider's data source object, which provides data from the data store to a consumer, from the data store itself, which contains the data but interacts with the consumer only through the data source object. For example, a data store might be a comma-separated-value (CSV) text file, an SQL DBMS, or an in-memory array in an application.

The data source object cotype is defined as follows. For more information about cotypes, see "Conceptual Programming Models in OLE DB" in Chapter 1: Overview of OLE DB.

CoType TDataSource {    [mandatory]   interface IDBCreateSession;    [mandatory]   interface IDBInitialize;    [mandatory]   interface IDBProperties;    [mandatory]   interface IPersist;    [optional]    interface IConnectionPointContainer;    [optional]    interface IDBAsynchStatus;    [optional]    interface IDBDataSourceAdmin;    [optional]    interface IDBInfo;    [optional]    interface IPersistFile;    [optional]    interface ISupportErrorInfo; }

For information about the registry entries used by providers to register classes of data source objects, see "Provider Registry Entries" in Chapter 18: Programming Considerations.

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