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From "Clint Morgan" <clint.mor...@troove.net>
Subject Re: Unique constraint
Date Thu, 18 Dec 2008 17:21:44 GMT
You could maintain an index, and then use the index to jump right to rows
for the column value(s) in question. See the tableindexed package for more
info..

cheers,
-clint

On Thu, Dec 18, 2008 at 4:37 AM, Slava Gorelik <slava.gorelik@gmail.com>wrote:

> Hi.I'm trying to implement Unique constraint on some column, but it looks
> like there no other solution than to scan all data.
> This solution is problematic from the performance perspective. Is it
> possible to implement this in the better way ?
>
> Best Regards.
>

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