Client Interface Changes
Applications Using Parcel Mode
In this mode, CLI is responsible for building the parcels as per the protocol used
for submitting the requests and data (optionally) to Teradata server.
CLI will always use the alternate header for the set of parcels that has the alternate
parcel support if:
The utilities use parcel mode (if DBCAREA option request_mode is set to “P”) for submitting
requests. The database should have the APH support for those sets of parcels.
DBCAREA field maximum_parcel is set to “H”. The size limit on the request buffer will
increase from 64K to 1 MB, if APH support exists.
The total request size (includes size of [EXTENDED] [KEEP] RESP + LAN Header + [options
parcel] exceeds 64K. CLI will return an error “REQOVFOW” 350, if APH support doesn’t
exist.
The DBCHQEP query item code to determine the alternate parcel header support at the
server is “QEPAREA” and has a value of 21. It returns a 2-byte unsigned binary value
in QEPAREA.
Value returned would be zero if no APH support exists.
Returns “1” if the first set of parcels, defined above, supports APH.