RE: CHAIN vs. SETLL

["Alan Addison" <ahaddison@xxxxxxxx>]

Is there not the caveat to this that records added by other programs since
the file was opened may or may not show up in the resulting operation?   I
seem to remember this bu am not sure about it.

Alan

-----Original Message-----
From: rpg400-l-admin@midrange.com [mailto:rpg400-l-admin@midrange.com]On
Behalf Of PatrickConner@parkdalemills.com
Sent: Monday, August 20, 2001 1:10 PM
To: rpg400-l@midrange.com
Subject: Re: CHAIN vs. SETLL



If a chain fails it does the same thing as a setll. However, it will
retrieve info if it is successful.
It is more efficient to use setll when you are only interested if a record
exists in a file.

Patrick Conner
www.ConnecTown.com
(828) 244-0822



                    "Reeve Fritchman"
                    <reeve@ltl400.com        To:     "RPG400-L@midrange.
com" <RPG400-L@midrange.com>
                    >                        cc:
                    Sent by:                 Subject:     CHAIN vs. SETLL
                    rpg400-l-admin@mi
                    drange.com


                    08/20/01 01:00 PM
                    Please respond to
                    rpg400-l






My understanding is that CHAIN grabs the record and fills the input buffer,
whilst (it's the British influence taking over) SETLL checks the access
path
only for the existence of the key.

If I want to know if a record with an identical key is already in the file,
I SETLL.  Yes, there are application reasons to do this!

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