17.10 - APH Parcels Sent to CLI Using the Extension Area in Parcel Mode - Call-Level Interface Version 2

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

Product
Call-Level Interface Version 2
Release Number
17.10
Release Date
October 2021
Content Type
Programming Reference
Publication ID
B035-2418-061K
Language
English (United States)

Applications have to send specific parcels with TDSP and Parameterized SQL requests, even in parcel mode. DBCAREA extension is used for this purpose. DBCAREA contains an extension header and the set of extension elements defined by CLI. The application chooses the set of extension elements by setting the “eyecatcher” field of the extension header. If set to “DBCX”, elements are defined to work only in 32-bit mode. If set to “IRX8”, elements are defined to work in 32-bit and 64-bit mode.

Existing element structures are inadequate for sending APH parcel flavors or parcel bodies whose size is greater than 65535 bytes. To overcome this limitation for supporting APH parcels, the following changes are implemented in DBCAREA extension:
  • New set of element structures are defined.
  • Use of existing element structures is deprecated.
  • Use of structure elements “D8XILMNT” and “D8XILPTR” defined by 64-bit implementation is deprecated.