On Tuesday, January 28, 2003, at 04:05 AM, Roy Brown wrote:

> fred White wrote:
>> On Thursday, January 30, 2003, at 02:36 PM, Roy Brown wrote:
>>
>> ..........................
>>
>>> TurboIMAGE/XL Database Management System Reference Manual
>>> HP e3000 MPE/iX Computer Systems
>>> ---------------------------------------------------------------------
>>> --
>>> --
>>> -------
>>> Edition 8 HP Part Number:30391-90012
>>> E0701 U.S.A. July 2001
>>> 2       Database Structure and Protection
>>>         Data Set Types and Relationships
>>>
>>> If you depend on extended sort fields to sort a chain, do not call
>>> DBUPDATE to modify any of the values in the extended sort fields
>>> because
>>> the chain will not be automatically resorted according to the new
>>> extended sort data values.
>>
>> True, with the following possible exceptions:

<< snip >>

>
> Hi Fred
>
> I think I'd see those as clarifications, rather than exceptions.
>
> What you are saying is that if it happens to work, it happens to work
>
> But while that might be good enough for Microsoft ( :-)  ), it's never
> been
> good enough for HP; at least not for CSY.
>
> And note that the manual doesn't say it will *never* work; it just
> says you
> can't depend on it.
>
> But your list does explain why a lot of people may never see the
> problem in
> practice, even if they are theoretically exposed to it.

True. That was my point. I just wanted to clarify for those that may
have become worried as a result of recent postings. Hopefully, my
comments would help their research efforts to determine if it is or is
not a problem for their application(s).

Thanks. --- FW

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