Follows-up Ic11c64813ee04e8520771bfa156f8e51404273e7 Bug: T181672 Change-Id: I58fe5edb1e7656773271634f702ed044c6036497
If the ip_changes table doesn't exist, the populateIpChanges maintenance script will fail gracefully, throwing a descriptive error. The postgres SQL is untested. Bug: T177258 Change-Id: Ic11c64813ee04e8520771bfa156f8e51404273e7