16.20 - Request-buffer-length - 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

Request-buffer-length is a four byte field that specifies the desired length of the buffer in which requests are placed for sending to the Teradata Database.

In this language... The variable name for Request-buffer-length is...
COBOL DBCAREA-REQ-BUF-LEN
PL/I REQ_BUF_LEN
C, C++ req_buf_len
IBM Assembler DBCIRBRL
This routine... Does this for Request-buffer-length...
DBCHINI writes
DBCHCL reads (CON; RSUP; IRQ; IWPF; CMD; CRQ)
Request-buffer-length is used by... To...
applications write

The value of zero indicates that DBCHCL is to use the default value from the HSHSPB for the Request-buffer-length.

The application may change the value in Request-buffer-length. The minimum value is 256, and the maximum value is 2147483647.

When less than the maximum is specified, CLIv2 increases the size of the request buffer as needed.

The maximum size request that can be specified for the Initiate Request function is 10, 12, or 24 bytes less than this buffer size, depending on support by the Database. These bytes are used by CLIv2 to add a parcel header and a Respond-type parcel.