Nulls

Description

Client-Library allows parameters to have a “null” value, that is, to contain no information, not even blanks or zeroes.

NULL and unused parameters

There are several rules for assigning null values to arguments:

Padding with NULLs

The format field of the DATAFMT structure of ct_bind can be padded with either blanks or nulls. CS_FMT_PADNULL pads with binary zeroes; CS_FMT_PADBLANK pads with blanks.