Subject Re: [firebird-support] DUP key on restore
Author Leonardo Carneiro
Tks for the tips guys. I'll try both of then.

On Thu, Nov 17, 2011 at 6:10 AM, Tomasz Tyrakowski <
t.tyrakowski@...> wrote:

> My point exactly. That's why I adviced checking for duplicates _after_
> removing indices and primary keys on problematic tables. I've never
> tried the method proposed by Svein, but if it really omits indices, it's
> better than mine (more subtle and doesn't mess with metadata).
>
> regards
> Tomasz
>
> On 2011-11-17 08:10, Svein Erling Tysvær wrote:
> >> Hi Tomasz. I already checked the source database for duplicated entries,
> >> and found none, but i did not tried to verify the database with gfix.
> >
> > Exactly how did you check it for duplicate entries? The point is that if
> there's a problem with an index or key, then doing
> >
> > SELECT MyIndexedField, count(*)
> > FROM MyTable
> > GROUP BY 1
> > HAVING count(*)> 1
> >
> > will use the index/key and not discover the duplicate entry, whereas
> >
> > SELECT MyIndexedField+0, count(*)
> > FROM MyTable
> > GROUP BY 1
> > HAVING count(*)> 1
> >
> > cannot use the index and will find such duplicates.
> >
> > HTH,
> > Set
> >
>
>
> --
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> __--== Tomasz Tyrakowski ==--__
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> __--== http://www.sol-system.pl ==--__
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