Re: [SQL] Duplicate tuples with unique index

Patrik Kudo <kudo@partitur.se> writes:
> db=> vacuum ;       
> NOTICE:  Rel pg_statistic: TID 1/93: OID IS INVALID. TUPGONE 0.
> NOTICE:  Index html_text_idx: NUMBER OF INDEX' TUPLES (1193) IS NOT THE
> SAME AS HEAP' (1258)
> ERROR:  Cannot insert a duplicate key into a unique index

Given the reference to pg_statistic, I wonder if you aren't getting
burnt by the recently-discovered bug wherein VACUUM ANALYZE tries to
create pg_statistic tuples that are too long.  I recommend (a) patch
vacuum.c (see Dirk Lutzebaeck's nearby message); then (b) drop and
recreate html_text_idx; finally (c) DELETE FROM pg_statistic and
then VACUUM ANALYZE to rebuild it.  Good luck!
        regards, tom lane