dinesh <dinesh@xxxxxxxxxxxx> writes: > I have a table, which has over 3 million rows. We have both a unique > constraint ( which creates implicit index) as well as a regular unique > index on the same column. We had to put the unique constraint because > duplicate values > were getting inserted to the table in spite of the regular unique index > on the column. That sounds awfully fishy. We have not heard of unique indexes failing to enforce the constraint in quite some time. What's the data type of the column? A possible explanation for this kind of issue is a broken comparison function for the particular data type. > We run postgresql 8.2.5 That's two years out of date, and the list of bugs fixed since then is quite extensive. A quick scan through the release notes doesn't show any obviously-related bugs, but it would still be worth your while to update to 8.2.latest and then reindex to see if the problem goes away. regards, tom lane -- Sent via pgsql-admin mailing list (pgsql-admin@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin