Comment 5 for bug 1065785

Reviewed: https://review.openstack.org/14416
Committed: http://github.com/openstack/nova/commit/32d8722d3bf86946a56afc74b9cc301a39a2bef1
Submitter: Jenkins
Branch: stable/folsom

commit 32d8722d3bf86946a56afc74b9cc301a39a2bef1
Author: Adam Gandelman <email address hidden>
Date: Thu Oct 11 18:49:54 2012 -0700

    read_deleted snapshot and volume id mappings.

    Since the migration that creates the volume_id_mappings and
    snapshot_id_mappings tables does not populate the 'deleted' column,
    queries to this table should not limit results to 'deleted=0'.
    Limiting to non-deleted rows results in duplicate mappings being
    created for existing instance mappings after an upgrade, and
    throws off volume and snapshot ID to UUID mapping.

    This is a stop-gap measure to ensure avoid serious breakage during
    an upgrade. The NULL columns in this table are actually unused
    currently and can be populated in later grizzly migrations, if they
    end up being used.

    Fixes bug 1065785.

    Change-Id: I893c994362a203288b9984f0ede24cbb274bfcc5
    (cherry picked from commit 43bf8344488a6af1046344c255bdb2edd7450475)