RE: API to retrieve data field contents

[Ken Sims <mdrg4136@xxxxxxxxx>]

Hi Jonathan -

> My thoughts are that the QDBBRCDS API is probably what I need and I'm happy
> with calling it.  My problem is that unlike other API's which fill user
> spaces or return data structure, the documentation doesn't provide any
> information other than "brings record data into main storage" so I have no
> idea how to access it.  Serching for QDBBRCDS on Google only provide the IBM
> links.

Notice that it is says that it *asynchronously* brings the records into 
main storage, which means that when the API returns control back to the 
caller, the record retrieval is not necessarily completed.

This leads me to believe that the purpose of the API is NOT to bring 
records in for the calling program to access them, but just to prefetch 
them so that when you do normal file I/O (chain, read, etc.) the records 
are already paged into main storage and don't have to be fetched from the 
disk, speeding up the file I/O.  (It would be nice if the "documentation" 
included some documentation.)

My recommendation is for you to use a program-described file for retrieving 
records.

--
Ken
http://www.ke9nr.net/
Opinions expressed are my own and do not necessarily represent the views of 
my employer or anyone in their right mind.