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  1.  Home
  2. RPG400-L
  3. October 1999

Re: Reade & Chain

  • Subject: Re: Reade & Chain
  • From: dkahn@xxxxxxxxx (Dave Kahn)
  • Date: Tue, 26 Oct 1999 5:20 +0100 (BST)
 
On Sun, 24 Oct 1999 20:43:51 -0500 David Gibbs (david@midrange.com)wrote:

> At 10:15 PM 10/20/99 , you wrote:
> >    What is the difference in the reading using READE and CHAIN 
> > opcodes?.
> 
> CHAIN is like doing a SETLL followed by a READE.

There is a small but sometimes very important difference. CHAIN sets the 
file position if the record is found, but doesn't alter it if the 
record is not found. SETLL always sets the file position.

Regards,

Dave Kahn
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