Each horizontal item that follows represents a call to DBCHCL with the function code set as in the left column.
| Function | Description |
|---|---|
| Connect/Fetch | Same as for a single session |
| Initiate Request (Session 1) |
Send Teradata SQL request to the Teradata Database. Application must set address and length of Teradata SQL request and optional using data. Application must save the Output-CLIv2-request-number. |
| Initiate Request (Session 2) |
Same as for session 1, probably with different data |
| Fetch (Session 1 and 2) |
Same as for a single session set Input-CLIv2-connection-number to the number of the session to be used set Input-CLIv2-request-number to the number of the request to be accessed |
| End Request | Clean up request-related context (Stream 1 and 2) |
| Disconnect (for each session) |
Log off from the Teradata Database and free the session-related control blocks |