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[nikhil komawar <nikhil.komawar@xxxxxxxxxxxxx>]

Public bug reported:

sqlalchemy/sql/default_comparator.py:35: SAWarning: The IN-predicate on "image_locations.id" was invoked with an empty sequence. This results in a contradiction, which nonetheless can be expensive to evaluate.  Consider alternative strategies for improved performance.
  return o[0](self, self.expr, op, *(other + o[1:]), **kwargs)

warning is shown.

Not sure if this is a bug, need some confirmation.

** Affects: glance
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1358904

Title:
  Warning for image_locations.id being empty while running tests

Status in OpenStack Image Registry and Delivery Service (Glance):
  New

Bug description:
  sqlalchemy/sql/default_comparator.py:35: SAWarning: The IN-predicate on "image_locations.id" was invoked with an empty sequence. This results in a contradiction, which nonetheless can be expensive to evaluate.  Consider alternative strategies for improved performance.
    return o[0](self, self.expr, op, *(other + o[1:]), **kwargs)

  warning is shown.

  Not sure if this is a bug, need some confirmation.

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