Hey In attach you will find an example which shows an implicit unique index not being recreated during import because the constraint is using an explicit index instead. Also note the failed import of some of the index_statistics, which can act as a red flag to detect such a case. Regards, Freek D'Hooge Uptime Oracle Database Administrator email: freek.dhooge@xxxxxxxxx tel +32(0)3 451 23 82 http://www.uptime.be disclaimer: www.uptime.be/disclaimer --- From: Joel.Patterson@xxxxxxxxxxx [mailto:Joel.Patterson@xxxxxxxxxxx] Sent: woensdag 16 november 2011 20:47 To: D'Hooge Freek; oracle-l@xxxxxxxxxxxxx Subject: Naming standards -- that lead to implicit/explicit constraint and index creation. Oracle version 10.2.0.4 I would appreciate an example where an Index is created such that by creating an implicit primary key or unique index on the table, would cause one of the indexes not to be imported. ... -- //www.freelists.org/webpage/oracle-l