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From Mike Matrigali <mikem_...@sbcglobal.net>
Subject Re: DERBY-1478 Lineitem DERBY-2599: Associating correct collation type and derivation with DTD
Date Mon, 30 Apr 2007 18:54:48 GMT


Mamta Satoor wrote:
> Hi,
>  
> I am working on putting the correct collation type and derivation for 
> DTDs. The approach I am taking is to change all the constructors for 
> DTDs to accept the collation type and derivation. It will be the 
> responsibility of the caller of the DTD constructor to pass this 
> information for all different kinds of DTDs, ie whether the DTD is for 
> collation sensitive datatypes (which include the character string 
> datatypes), or all the other non-collation sensitive datatypes (eg 
> numeric, binary etc,). For non collation sensitive datatypes, the caller 
> will pass collation derivation of "none" which will mean that collation 
> type of such datatypes should be ignored.
>  
> I just wanted to bring it to community's attention that this approach of 
> changing the DTD constructor signature is requiring lot of changes since 
> all the callers now have to taken on the task of passing the collation 
> type and derivation. I think that is the right approach ie have callers 
> take on the responsibility of associating the collation types and 
> derivations for their DTDs. Let me know if anyone has any feedback on 
> how I am approaching this.
>  
Have you done any of this work yet, if so could you post a partial patch
as an example of the kinds of changes you are proposing.  I don't expect 
a completed work, just something to get a feel of the type of changes.

> thanks,
> Mamta


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