The goal of this change is to improve the storagenode_storage_tallies table by removing the unneeded id column that is not being used but only taking up space, and also to add an index on a different column that needs it. Removing and adding a column seems simple, but ended up being more complicated because of some cockroachdb limitations.
The cockroachdb limitation when trying to remove a column from a table and create a new primary key are:
1. only allows primary key creation at table creation time (docs: https://www.cockroachlabs.com/docs/stable/primary-key.html)
2. table drop or rename is performed async and cannot be done in a transaction (issue: https://github.com/cockroachdb/cockroach/issues/12123, https://github.com/cockroachdb/cockroach/issues/22868)
To address these differences between cockroachdb and Postgres, this PR performs different migrations for the two database. The Postgres migration is straight forward and what you would expect, but the cockroach migration has two main changes:
1. To change a primary key, use the recommended process from the cockroachdb docs to create a new table with the new primary key you want and then migrate the data.
2. In order to do 1, we needed to do the new table renaming in a separate transaction from the data migration.
Ref: SM-65
Change-Id: Idc9aee3ab57aa4d5570e3d2980afea853cd966bf
everyone was importing it as dbx anyway. why should it be
named satellitedb? so yeah just pass the "-p dbx" flag.
Change-Id: I5efa669f4f00f196b38a9acd0d402009475a936f
Backstory: I needed a better way to pass around information about the
underlying driver and implementation to all the various db-using things
in satellitedb (at least until some new "cockroach driver" support makes
it to DBX). After hitting a few dead ends, I decided I wanted to have a
type that could act like a *dbx.DB but which would also carry
information about the implementation, etc. Then I could pass around that
type to all the things in satellitedb that previously wanted *dbx.DB.
But then I realized that *satellitedb.DB was, essentially, exactly that
already.
One thing that might have kept *satellitedb.DB from being directly
usable was that embedding a *dbx.DB inside it would make a lot of dbx
methods publicly available on a *satellitedb.DB instance that previously
were nicely encapsulated and hidden. But after a quick look, I realized
that _nothing_ outside of satellite/satellitedb even needs to use
satellitedb.DB at all. It didn't even need to be exported, except for
some trivially-replaceable code in migrate_postgres_test.go. And once
I made it unexported, any concerns about exposing new methods on it were
entirely moot.
So I have here changed the exported *satellitedb.DB type into the
unexported *satellitedb.satelliteDB type, and I have changed all the
places here that wanted raw dbx.DB handles to use this new type instead.
Now they can just take a gander at the implementation member on it and
know all they need to know about the underlying database.
This will make it possible for some other pending code here to
differentiate between postgres and cockroach backends.
Change-Id: I27af99f8ae23b50782333da5277b553b34634edc
* rename pkg/linksharing to linksharing
* rename pkg/httpserver to linksharing/httpserver
* rename pkg/eestream to uplink/eestream
* rename pkg/stream to uplink/stream
* rename pkg/metainfo/kvmetainfo to uplink/metainfo/kvmetainfo
* rename pkg/auth/signing to pkg/signing
* rename pkg/storage to uplink/storage
* rename pkg/accounting to satellite/accounting
* rename pkg/audit to satellite/audit
* rename pkg/certdb to satellite/certdb
* rename pkg/discovery to satellite/discovery
* rename pkg/overlay to satellite/overlay
* rename pkg/datarepair to satellite/repair
