Session Object Interfaces
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The following table shows the mandatory and optional interfaces defined by OLE DB for a session object.
| Interface | Required? | Implemented by OLE DB templates? |
|---|---|---|
| IGetDataSource | Mandatory | Yes |
| IOpenRowset | Mandatory | Yes |
| ISessionProperties | Mandatory | Yes |
| IAlterIndex | Optional | No |
| IAlterTable | Optional | No |
| IBindResource | Optional | No |
| ICreateRow | Optional | No |
| IDBCreateCommand | Optional | Yes |
| IDBSchemaRowset | Optional | Yes |
| IIndexDefinition | Optional | No |
| ISupportErrorInfo | Optional | Yes |
| ITableCreation | Optional | No |
| ITableDefinition | Optional | No |
| ITableDefinitionWithConstraints | Optional | No |
| ITransaction | Optional | No |
| ITransactionJoin | Optional | No |
| ITransactionLocal | Optional | No |
| ITransactionObject | Optional | No |
The session object creates a rowset object. If the provider supports commands, the session also creates a command object (CCommand, implementing the OLE DB TCommand). The command object implements the ICommand interface and uses the ICommand::Execute method to execute commands on the rowset, as shown in the following figure.
.jpeg "Provider conceptual diagram")