| Platform SDK: Exchange 2000 Server | 
[This is preliminary documentation and subject to change.]
The following table lists the OLE DB Version 2.5 interfaces implemented by the Exchange OLE DB Command COM class.
| Interface | Supported | 
|---|---|
| IAccessor | yes | 
| IColumnsInfo | yes | 
| ICommand | yes | 
| ICommandProperties | yes | 
| ICommandText | yes | 
| IConvertType | yes | 
| IColumnsRowset | no | 
| ICommandPersist | no | 
| ICommandPrepare | yes | 
| ICommandWithParameters | no | 
| ISupportErrorInfo | no | 
Structured Query Language SQL joins are not supported. All other SQL constructs are supported, for example, WHERE clause, relational operators, and projections.
The CONTAINS clause in an ICommand::Execute method cannot have more than 1024 characters.