Create databases/schemas during shard creation about pg_shard HOT 2 OPEN

We'll have to scope this one, and I think the more general story at work here is "there are primitives above TABLE that may need to be created". We should probably enumerate them and decide which we will/won't create.

Creating a database may prove a bit problematic as I believe it's something that must be specified at connection-time, so this might involve:

• Connecting to a shard using the postgres
• Creating the proper database
• Purging that connection from our cache
• Reconnecting with the proper DB

I could be wrong about connections being DB-bound, but that was my impression.

from pg_shard.

No, that sounds right. That's what I meant by "additional error-handling"; we'll need to handle situations like if the "postgres" database doesn't exist or we can't reach it.

from pg_shard.