[Info-vax] VSI roadmap

[Jan-Erik Söderholm]

Den 2023-08-20 kl. 19:30, skrev Johnny Billquist:
> On 2023-08-20 18:00, Dave Froble wrote:
>> On 8/20/2023 11:01 AM, Johnny Billquist wrote:
>>> On 2023-08-18 22:39, Dave Froble wrote:
>>> [...]
>>>
>>>> Ok, understand what you are doing.
>>>>
>>>> Caviet, I've never used Rdb.
>>>>
>>>> Another, I've only used SQL2000 from Microsoft.
>>>>
>>>> Regardless, consider the following:
>>>>
>>>> SELECT * From CustomerTable Where Country is "USA"
>>>>
>>>> And where country is not a key.
>>>>
>>>> In RMS this cannot be done, without scanning all records, and use some 
>>>> type of
>>>> mapping of the record definition, CDD, include file, in program 
>>>> definition.
>>>> However, if the database contains the record definitions, then the 
>>>> database
>>>> would return a recordset of the records with Country equal to USA.
>>>
>>> Maybe I missed something. I didn't see RMS in there anywhere.
>>> So why are you bringing that up?
>>>
>>> Rdb is not the same thing as RMS.
>>>
>>>   Johnny
>>>
>>
>> The topic was the VSI replacement for CDD.  CDD was/is used to provide 
>> record definitions for RMS and anything else that needed such.  My 
>> opinion is that the lack of record definitions in any data store is poor 
>> design.
> 
> Well, in this case it was Rdb, wasn't it? But sure, you need record 
> definitions for anything/everything. And it's nice if that comes from the 
> same source. Which is what I think is what Jan-Erik was describing/doing.

Well, I was just describing how to get record defs for your Rdb tables
in a format that can be used directly by your programming language.

> 
> Data stored in Rdb, record definitions extracted with RMU to whatever 
> language used, then eventually included in the compilation.
> 
> Now, where did RMS come into this, and it would certainly seem that the 
> record definitions are available along with the data store.
> 
> How this is related to CDD is another question. But that apparently came 
> from the fact that Rdb is owned by Oracle, and so is CDD. And VSI have a 
> replacement for CDD, but Oracle also seem to be going to port Rdb to 
> x86-64. Unclear if they also care about CDD. But since VSI have a 
> replacement, that seems non-critical. Is CDD/VDD tied in with that RMU tool?
> 
>    Johnny
> 

Not sure I follow... Why should CDD be "tied in" with RMU?
The "Rdb Management Utility".

If you have CDD, the compilers read records defs directly from CDD
and RMU has nothing to do with that.

If you do not have CDD, RMU can create record defs for you to be
later included by the compiler.