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From Daniel John Debrunner <...@apache.org>
Subject Re: Collation implementation WAS Re: Should COLLATION attribute related code go in BasicDatabase?
Date Thu, 15 Mar 2007 19:08:52 GMT
Mamta Satoor wrote:
> Dan, I am responding to this without thinking about a whole lot but 
> wanted to put it out. With this scheme of putting collation inside the 
> existing character type, are we going to impact the performance of 
> Derby's default collation which is UCS_BASIC? The goal from the 
> beginning has been to leave current SQLChar implementation as unaware of 
> the new collation requirement as possible. It's possible that your 
> suggestion does take that into account but I thought I would ask the 
> question if this approach is going to impact the performance of existing 
> Pre 10.3 upgraded to 10.3 or new 10.3 databases created with default 
> collation?

Not sure what you mean by "putting the collation inside the existing 
character type", but I think there will be no performance impact on 
SQLChar, I'm assuming all the setup is done when the activation is 
initialized. It's just flipping which runtime class does the comparisons.

Dan.


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