Is it correct that upgrading from 9i to 10g will change the MV refresh behaviour. I checked in one forum that it will use delete command for complte refresh instead of Truncate. Has anybody seen this issue. If this is true then Is there any parameter in init.ora that can change the default behaiour of 9i like using Truncate. I checked the forum and they are referring Atomic Refresh attribute in DBMS_mview can revert the process but it is not good to modify several MV. Is it only true when we move from 9i to 10g or also true if MV are created in 10g itself. TIA Sanjay ____________________________________________________________________________________ Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs