ROWVERSION Data Type
The ROWVERSION data type defines a read-only field that contains a unique system-assigned positive integer, beginning with 1. InterSystems IRIS assigns sequential integers as part of each insert, update, or %Save operation. These values are not user-modifiable.
InterSystems IRIS maintains a single row version counter namespace-wide. All tables in a namespace that contain a ROWVERSION field share the same row version counter. Thus, the ROWVERSION field provides row-level version control, allowing you to determine the order in which changes were made to rows in one or more tables in a namespace.
You can only specify one field of ROWVERSION data type per table.
The ROWVERSION field should not be included in a unique key or primary key. The ROWVERSION field cannot be part of an IDKey index.
For details on using ROWVERSION, refer to RowVersion Field.
