"Paul B. Anderson" <paul.a@xxxxxxxxxxxxxxxxx> writes: > I did delete exactly one of each of these using ctid and the query then > shows no duplicates. But, the problem comes right back in the next > database-wide vacuum. That's pretty odd --- I'm inclined to suspect index corruption. > I also tried reindexing the table. Get rid of the duplicates (actually, I'd just blow away all the pg_statistic entries for each of these tables) and *then* reindex. Then re-analyze and see what happens. Worst case you could just delete everything in pg_statistic, reindex it, do a database-wide ANALYZE to repopulate it. By definition there's not any original data in that table... regards, tom lane
