Re: LVLCHK *NO

[pytel@xxxxxxxxxx]

Well, I think it's just another religious war - what is better - static or
dynamic.
Both have their advantages and disadvantages.

Best regards
    Alexei Pytel


Jim Langston <jlangston@conexfreight.com> on 10/04/99 09:48:55 AM

Please respond to RPG400-L@midrange.com

To:   RPG400-L@midrange.com
cc:
Subject:  Re: LVLCHK *NO




Okay, lets look at dBase, Clipper, Foxpro, BTrieve, Access, am I leaving
any out?

I seem to recall that if I changed the layout of a database in any of those
languages I would not have to recompile unless I removed a field that was
being used in one of those programs.

The distinction is: those programming languages (and the underlying database
architecture) get the file layout from the file itself, not from an internal
declaration.
Which is how I was hoping RPG would do it.  RPG already has access to the
layout of the file at run time, does it not?  Yes, I understand it would take
longer

at program initialization for RPG to retrieve the layout from the data base
file.
And I understand that RPG is not doing that now, because it didn't in the past.
But, what is stopping it now?

Regards,

Jim Langston


pytel@us.ibm.com wrote:

> I see a kind of confusion here:
>
>      > Just about every other data base in the world does this but not the
> AS/400.
>
> AS/400 database is certainly doing this for you. Native I/O provides static
> database independence - you only have to recompile the program if you change
the
> file. It also provides tools to improve this independence - logical files
(more
> about it later).
> If you want dynamic database independence - AS/400 provides it via SQL
> interface.
> You should compare apples to apples - native Database Access should be
compared
> to native I/O for UNIX or NT - which is unformatted stream of bytes.
> If you compare AS/400 to Oracle, for example, then to be fair you should use
> OS/400 SQL for comparison.

<SNIP>

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