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From Mike Matrigali <mikem_...@sbcglobal.net>
Subject Re: [jira] Updated: (DERBY-3330) provide support for unique constraint over nullable columns
Date Fri, 22 Feb 2008 20:21:54 GMT
Anurag shekhar wrote:
> Army wrote:
>> Mike Matrigali wrote:
>>> This would mean either dropping/recreating the index at alter time or
>>> adding a new store interface to "convert" from old index type to new
>>> index type.
>>
>> I haven't been following this discussion at all, but for what it's 
>> worth, this same sort of question came up in the context of 
>> DERBY-3299.  I went with the simple approach of dropping the old index 
>> and creating the new one, so some logic for that kind of thing is now 
>> in the 10.4 codeline.  I plan to build on that a bit more for 
>> DERBY-2204, though the latter changes probably won't be in for 10.4.
>>
>> The changes for DERBY-3299 are entirely language-layer, but perhaps 
>> it's something that can be used here?  Again, I don't really know 
>> since I haven't been on top of this issue, but I thought I'd mention 
>> it...
>>
>> Army
>>
> Thanks Army
> I think I can use your code for creating replacement index. I might have 
> to write one
> more method to accept a new IndexRowGenerator as in this case the
> index properties will be different.
> anurag
> 
> 
Also depending on how much work this is you could incrementally check in
a patch that disallows this alter table as the code did before, and then
subsequently fix this case.

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