Re: [SQL] Duplicate tuples with unique index

> Palle Girgensohn <girgen(at)partitur(dot)se> writes:
> > Unfotunately, it doesn't quite work:
>
> > pp=> vacuum analyze;
> > NOTICE: Rel pg_statistic: TID 1/93: OID IS INVALID. TUPGONE 0.
> > VACUUM
> > pp=> delete from pg_statistic;
> > ERROR: heap_delete: (am)invalid tid
>
> Ugh. Yup, your pg_statistic table is corrupted all right.
>
> What you may have to do is pg_dump that database, destroydb/createdb,
> and reload.
>
> I have a possible shortcut for you, but I *strongly* suggest that you
> pg_dump first in case it doesn't work! After making your backup dump,
> stop the postmaster and truncate the broken database's pg_statistic
> file to zero length:
> cp /dev/null .../data/base/yourdb/pg_statistic
> Then restart the postmaster and see if you can vacuum analyze the
> broken database. If so, you are good to go; if not, it's time to
> reload that database.
>

Running pg_upgrade is another option.

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