Altering table owners

Hi there I have to change a load of table owners from user1, user2 and user3 to user4 as part of tidying up some areas of our system We are using Inf 7.23 SE The only way I know so far is to export the database, hack the export file and alter the owners from user1, 2 & 3 to user4 then import the database using the new sql script However I have noticed the owner of a table is stored in the system table systables select tabname, owner, tabid from systables order by tabid Can I alter this using UPDATE systables SET owner = User4 where tabname = tablename Is this a good idea, are there any implications I am missing This will save exporting and reimporting my whole database Many thanks in advance Alastair Kimbell al@ackone.demon.co.uk