Tom -
Your suggestion gives me an idea, and I'd like your opinion since I haven't done much with schemas.
(1) Separate the datasets into different schemas
(2) Use different schema names for different static data releases
(3) For the *company*, we can use a schema search path that includes the next schema
(4) For the *users*, they can use a schema search path that includes the released schema
Then, I wouldn't have to modify any code, except to set the schema search path based on who was connecting.
Does this sound reasonable?
Jon
On Thu, Mar 29, 2012 at 1:26 PM, Tom Molesworth
<tom@audioboundary.com> wrote:
Hi Jonathan,
On 29/03/12 19:01, Jonathan Bartlett wrote:
Now, my issue is that right now when we do updates to the dataset, we have to make them to the live database. I would prefer to manage data releases the way we manage software releases - have a staging area, test the data, and then deploy it to the users. However, I am not sure the best approach for this. If there weren't lots of crossover queries, I could just shove them in separate databases, and then swap out dataset #1 when we have a new release.
Right. That's the reason I asked on the list. I didn't know if there is a good way of managing this sort of data. If I could just have two different databases, I would have done that a while ago. I didn't know if someone had a similar situation and what kind of solution they used for it. Right now, both datasets are in the same database. But that means I can't do releases of the static dataset, and instead, when the company updates the database, we have to make the updates directly on the live database. I'm trying to avoid that and do releases, and I am seeing if anyone knows of a good approach given the constraints.
Have you considered using views in the queries instead of hitting the base tables directly? You could then load the releases into a different schema (so instead of select * from mytable, you have a view which does select * from release_20110329.mytable, for example) or use different table names for each release (live_*, test_*, beta_* maybe). Switching between releases should be fast (and atomic), but everything would still be within the same database so you'd be able to get to all the data you need.
cheers,
Tom
