Обсуждение: Unique constraint and index-combination feature in 8.1

Hi,

Is it somehow possible to create a UNIQUE constraint that relies on non-unique
ONE-column indexes and uses index-combination feature in 8.1 ?

The alternative, which we use now, is to create a unique MULTI-column index on
the respective coulumns.

Thanks





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On Tue, Jun 20, 2006 at 03:40:37 -0700,
  ow <oneway_111@yahoo.com> wrote:
>
> Hi,
>
> Is it somehow possible to create a UNIQUE constraint that relies on non-unique
> ONE-column indexes and uses index-combination feature in 8.1 ?
>
> The alternative, which we use now, is to create a unique MULTI-column index on
> the respective coulumns.

I am not completely sure what you are asking. But if you want a unique
constraint over multiple columns you can specify a unique table constraint
using multiple columns when you create a table.

If you are looking for something else, it might help to give a bit more
description about what you are looking for.

Are you saying you want to create a unique constraint across the indexes of 2 or more columns rather than across the columns themselves?

-Aaron