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.

regards, tom lane