17.10 - Applications using Parcel mode (request_mode='P') - Call-Level Interface Version 2

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

Call-Level Interface Version 2
Release Number
October 2021
Last Update
Content Type
Programming Reference
Publication ID
English (United States)
Last Update
CLI uses, either Response (PclRESP) or the KeepResponse (PclKEEPRESP) parcel to inform the server about the size of response buffer allocated to receive the response message.
  • Use of 'PclRESP' or 'PclKEEPRESP' parcel is directed by the client to CLI through DBCAREA field 'keep_resp'.
  • Initial buffer size that needs to be allocated by CLI for collecting the response messages is directed by the client using DBCAREA field 'resp_buf_len'.
  • If this response buffer size does not fit one single response message then server sends a 'Message overflow' error (3115 or 3116) through error parcel. CLI parses this error parcel and grows its response buffer as indicated in 'info code' of error parcel.
Currently NW CLI controls the maximum limit of the response size that can directed by the client in DBCAREA field 'resp_buf_len' through another DBCAREA field 'maximum_parcel'.
  • If 'maximum_parcel' is set to 'O', then 'resp_buf_len' can be set to not more than 32K.
  • If 'maximum_parcel' is set to 'H', then 'resp_buf_len' can be set to not more than 64K.