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From Daniel John Debrunner <...@debrunners.com>
Subject Re: [jira] Commented: (DERBY-334) Add initial SQL support for XML datatype/functions in Derby, based on SQL/XML specs.
Date Sat, 04 Jun 2005 21:45:18 GMT
Army wrote:
> Satheesh Bandaram wrote:
> 
>> I think that part of the code needs to be changed too. You seem to be
>> using DataDictionary just to set 'defaultImplId', which you might be
>> able to do it outside of datatype layer?
> 
> 
> It might be possible, but I'm not sure how.  The reason I use
> DataDictionary to get the default impl id is because the default impl id
> depends on the version of the _on-disk_ database, and that information
> is only available from the DataDictionary, so far as I know.
> 
[snip]

The actual issue is that you don't know *now* how a different
implementation will be selected, thus putting in logic to handle that is
premature. As you say, better to let the person who adds a separate
implementation figure it out.

Dan.


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