Re: Reading records by key using C runtime record i/o functions

On 14-Nov-2011 08:02 , Charles Wilt wrote:

<<SNIP>>

if I want to read a set of records with a certain key, do I need
to call _rlocate() followed by _rreadK() in a loop or can I use
_rreadn()?

Note: I'll be dealing with a partial key...

  I am not aware of any requirement for using locate.  For keyed
processing I recall using just _rreadk() "Read a Record by Key" primed
with opt=__KEY_EQ then looping with opt=__KEY_NEXTEQ to read another row
with the same key value as the one found with __KEY_EQ.  Refer to the
"positioning macros" which are defined in recio.h to see what\how to
navigate using those /opts/ [processing options].  The specified key
length enables the partial key, but the key feedback\return value always
includes the full key value; for the length defined for the file that
was opened.

  Note there is a C programming list here too.
http://archive.midrange.com/c400-l

Regards, Chuck
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