On 07/01/2016 06:17 PM, Jim Nasby wrote:
> On 6/30/16 9:16 AM, Merlin Moncure wrote:
>> It's not really necessary to create version down scripts. In five
>> years of managing complex database environments we've never had to
>> roll a version back and likely never will; in the event of a disaster
>> it's probably better to restore from backup anyways.
>
> I'm surprised no one has mentioned http://sqitch.org. It makes it very
> easy to manage migrations, as well as creating downgrade scripts (if
> you use rework, and put each object into it's own file).
>
> I do agree that down scripts are pretty over-rated as long as you have
> good test practices (as in, database unit tests). In 9 years in an
> environment where downtime was 6 figures per hour I only had 1 or 2
> deployments that had problems, and never bad enough to consider
> reverting.
I've found down scripts quite useful in development. One does have to
know how to neuter them on the way to production however.