Hi I had 2 Tb table with Quarterly Partition and has 5 Global index. When we are doing quarterly maintenance and exchanging the partition we are using the Clause WITHOUT VALIDATION UPDATE GLOBAL INDEXES As two of them are Unique index and so I think VALIDATION is anyway done. Question is that how it impact the Indexes ? Do I really need to Rebuild the index in the future or it is fine. Actually Earlier partition maintenance are not done with above clause leaving Index in Unusable state but adding the above will avoid this and save downtime which is big due to several big indexes as well as DB in LOGGING mode due to Standby database. TIA Sanjay