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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

** Changed in: nova
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1292963

Title:
  postgres incompatibility in InstanceGroup.get_hosts()

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  When running InstanceGroup.get_hosts() on a havana installation that
  uses postgres I get the following error:

  
  RemoteError: Remote error: ProgrammingError (ProgrammingError) operator does not exist: timestamp without time zone ~ unknown
  2014-03-14 09:58:57.193 8164 TRACE nova.compute.manager [instance: 83439206-3a88-495b-b6c7-6aea1287109f] LINE 3: ....uuid != instances.uuid AND (instances.deleted_at ~ 'None') ...
  2014-03-14 09:58:57.193 8164 TRACE nova.compute.manager [instance: 83439206-3a88-495b-b6c7-6aea1287109f]                            ^
  2014-03-14 09:58:57.193 8164 TRACE nova.compute.manager [instance: 83439206-3a88-495b-b6c7-6aea1287109f] HINT:  No operator matches the given name and argument type(s). You might need to add explicit type casts.

  
  I'm not a database expert, but after doing some digging, it seems that the problem is this line in get_hosts():

  filters = {'uuid': filter_uuids, 'deleted_at': None}

  It seems that current postgres doesn't allow implicit casts.  If I
  change the line to:

  filters = {'uuid': filter_uuids, 'deleted': 0}

  
  Then it seems to work.

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