Returns the context_info value that was set for the current session or batch by using the SET CONTEXT_INFO statement.
Multiple active result sets (MARS) enables applications to run multiple batches, or requests, at the same time on the same connection. When one of the batches on a MARS connection runs SET CONTEXT_INFO, the new context value is returned by the CONTEXT_INFO function when it is run in the same batch as the SET statement. The new value is not returned by the CONTEXT_INFO function run in one or more of the other batches on the connection, unless they started after the batch that ran the SET statement completed.
The following simple example sets the context_info value to 0x1256698456, and then uses the CONTEXT_INFO function to retrieve the value.
SET CONTEXT_INFO 0x1256698456 GO SELECT CONTEXT_INFO() GO