17.10 - Alternate Parcel Header Structure - Call-Level Interface Version 2

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

Call-Level Interface Version 2
Release Number
Release Date
October 2021
Content Type
Programming Reference
Publication ID
English (United States)
The parcel APH fields are as follows:
Field Purpose
PclFlavor (Flavor) The size remains 2-byte; however, the most significant bit (MSB) of the 2-byte flavor is set to indicate that an alternate parcel header is being sent from the client to the server.
PclLength (Length) Reserved: This is the existing length field in the old parcel header. The size is 2-byte. This field should always be set to zero.
PclAltLength (AltLength) This is the new field of 4-byte size, included in alternate parcel header. The numeric value in this field describes the actual parcel length.