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The "Hive/Locking" page has been changed by NamitJain. http://wiki.apache.org/hadoop/Hive/Locking?action=diff&rev1=5&rev2=6 -------------------------------------------------- The compatiblity matrix is as follows: + ||''' ''' ||'''Existing Lock''' ||'''S''' ||'''X''' || + ||'''Requested Lock''' ||''' ''' ||''' ''' ||''' ''' || + ||'''S''' ||''' ''' ||'''True''' ||'''False''' || + ||'''X''' ||''' ''' ||'''False''' ||'''False''' || For some operations, locks are hierarchial in nature - for eg. for some partition operations, the table is also locked (for eg. to make sure that the table cannot be dropped while a new partition is being created)
