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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Update of "Hive/Locking" by NamitJain
Date Wed, 05 May 2010 01:24:05 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change notification.

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)

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