One Request at a Time - Call-Level Interface Version 2

There are times when CLI sends a request to the Teradata Database for the next buffer-full of a response and it conflicts with a more recent request of the Teradata Database. The rule is that a session may have the Teradata Database active on its behalf for only one request at a time. This applies to the requests the application knows about as well as to the re-stocking requests done “behind the scenes.” If CLI is re-stocking response buffers, CLI will return “busy” from a call to DBCHCL for the Fetch function if Wait For Response is “N.” This phenomenon is a possibility when a new request has been “refused.”