16.20 - Continuing a Teradata SQL Request - Teradata Tools and Utilities

Teradata® Call-Level Interface Version 2 Reference for Mainframe-Attached Systems

prodname
Teradata Tools and Utilities
vrm_release
16.20
created_date
September 2019
category
Programming Reference
featnum
B035-2417-108K

When an ElicitData, ElicitDataByName, or ElicitFile response parcel is fetched, Teradata Database requires additional information to complete the request. To provide that information, an application must perform the following steps:

  1. Modify the DBCAREA.
    1. Set the Function to 15 (ContinueRequest).
    2. Set the Input CLIv2 Session Id to the Output-CLIv2-request-number returned when the session was established.
    3. Set the Input-CLIv2-request-number to the Output-CLIv2-request-number returned when the request was initiated.
    4. Set the Request-pointer field.
    5. Set the Request-length field.
    6. Optionally set the following fields:

      Fetch Buffer Length field

      Message-area-pointer field

      Message-area-length field

    7. Optionally set the Change-options option to 'Y', and set the following:

      C2S-conversion option

      Locate-mode option

      Maximum-parcel option

  2. Call DBCHCL to perform the ContinueRequest function.
  3. Check the return code from DBCHCL:
    Return Code Result
    0 Call DBCHCL to perform a Fetch function to get the final status of the rewind and the first part of the response. For more information, see Fetching the Response for a Request.
    anything else Process the return code and DBCAREA message.
  4. Call DBCHCL to perform the End Request function. For more information, see Ending a Request.