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[Salvatore Orlando <1354188@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

If the script detects that a foreign key must be removed, and the
columns that it references must be removed as well, then the foreign key
removal would fail as the column would not exist anymore.

This has been detected by accident in the following way:

on a grizzly deployment running the vmware plugin, disable it and switch to another plugin. Then upgrade to havana.
Then enable again vmware plugin and upgrade to head. The upgrade process will fail.

As a matter of fact, this error will show likely show up with the
migration reorganization in progress, so it's worth fixing.

** Affects: neutron
     Importance: Medium
     Assignee: Salvatore Orlando (salvatore-orlando)
         Status: In Progress


** Tags: db

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https://bugs.launchpad.net/bugs/1354188

Title:
  Small glitch in heal script

Status in OpenStack Neutron (virtual network service):
  In Progress

Bug description:
  If the script detects that a foreign key must be removed, and the
  columns that it references must be removed as well, then the foreign
  key removal would fail as the column would not exist anymore.

  This has been detected by accident in the following way:

  on a grizzly deployment running the vmware plugin, disable it and switch to another plugin. Then upgrade to havana.
  Then enable again vmware plugin and upgrade to head. The upgrade process will fail.

  As a matter of fact, this error will show likely show up with the
  migration reorganization in progress, so it's worth fixing.

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