Introduction - 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
English (United States)
Last Update
Product Category
Teradata Tools and Utilities

The standard parcel header format (SPH) contains a 2-byte flavor field and a 2-byte length field. This format limits the length of the parcel to 65536 bytes.

The alternate parcel header (APH), extends the limit to 1 MB. The APH format contains a 2-byte flavor field, a 2-byte reserved field, and a 4-byte length field.

dbcarea.consider_APH_resps must be set to ‘Y’ to receive APH responses.

The following table lists the parcel flavor, name, and description.

Parcel Flavor Name Description
1 Req Record mode request parcel
2 RunStartup Startup parcel
3 Data Data parcel
4 Resp Response parcel
5 KeepResp Keep response parcel
7 Cancel Cancel parcel sent to cancel the stored procedures multi-tsr parcel
13 FMReq Field mode request parcel
14 FMRunStartup Field mode startup request
32 NOP No operation parcel
68 IndicData Data parcel containing indicator bytes
69 IndicReq Indicator mode request parcel
71 DataInfo Data info parcel
72 IVRunStartup Indicator mode startup request
85 Options Parcel for request
120 CursorHost Cursor parcel sent by host
128 MultiTsr Multi TSR parcel used by stored procedures
129 SPOptions Stored procedures options parcel
140 MultipartData MultipartData parcel
141 EndMultipartData End MultipartData parcel
142 MultipartIndicData Multipart Indic data parcel
143 EndMultipartIndicData End Multipart Indic data parcel
146 DataInfoX Datainfox parcel
147 MultipartRunStartup MultipartRunStartup parcel
148 MultipartRequest MultipartRequest parcel
153 ExtResp New extended response parcel
154 ExtKeepResp New extended keep response parcel
157 SETPOSITION Cursor positioning request
158 ROWPOSITION Row position to which cursor needs to be repositioned.
159 OFFSETPOSITION From where the LOB data should be returned.