Re: Are level checks still useful?

This is an internally-described or program-described file technique - you specify record length and key length in the F-spec - probably the key has to be in position 1 of the record.

As I just replied to Mark W., this was a very narrow requirement posted there.

If types or sizes change beyond certain lengths, I suspect there is no need to recompile. But the assumption here was that the key would never change, seems to me.

Lots of assuming - and we know about that!

Still, an interesting discussion.

Vern

On 11/7/2012 12:19 PM, Alan Campin wrote:

What happens if you change type or size?


On Wed, Nov 7, 2012 at 11:15 AM, Nathan Andelin <nandelin@xxxxxxxxx> wrote:

PHP/MYSQL people scratch there head (more like point fingers at
me and snicker) when we struggle with level check.

There was a tip on Linkedin last night for people who are struggling with
file level checks. It seemed to be worth considering, so I wrote a small
program to test the idea. This is a program that performs setll, read,
write, update, and delete operations against a table:

http://www.radile.com/rdweb/temp/rla110.txt


With this structure, no file level checks are reported at runtime even
though the file is defined with LVLCHK(*YES), new fields have been added,
using alter table, the program was NOT recompiled, and it seems to run
flawlessly.

Thoughts?

Record layouts and key layouts are externally defined, too. Nice!

-Nathan

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