These constants are used to determine how RDO manages concurrency on rdoResultset objects created with the OpenResultset method or the RemoteData control.
| Constant | Value | Description |
| rdConcurReadOnly | 1 | (Default) Cursor is read-only. No updates are allowed. |
| rdConcurLock | 2 | Pessimistic concurrency. Cursor uses the lowest level of locking sufficient to ensure the row can be updated. |
| rdConcurRowVer | 3 | Optimistic concurrency based on row ID. Cursor compares row ID in old and new rows to determine if changes have been made since the row was last accessed. |
| rdConcurValues | 4 | Optimistic concurrency based on row values. Cursor compares data values in old and new rows to determine if changes have been made since the row was last accessed. |
| rdConcurBatch | 5 | Optimistic batch mode operation. Can only be used when CursorDriver is set to rdUseClientBatch. |