* libsql: attach databases from other namespaces as readonly
With this proof-of-concept patch, other namespaces hosted
on the same sqld machine can now be attached in readonly mode,
so that users can read from other databases when connected
to a particular one.
* connection: add allow_attach to config
Default is false, which means connections are blocked from attaching
databases. If allowed, colocated databases can be attached in readonly
mode.
Example:
→ attach another as another; select * from another.sqlite_master;
TYPE NAME TBL NAME ROOTPAGE SQL
table t3 t3 2 CREATE TABLE t3(id)
* libsql,namespaces: add client-side ATTACH support
* attach: support ATTACH x AS y aliasing
We're going to need it, because the internal database names in sqld
are uuids, and we don't expect users to know or use them.
* attach: fix quoted db names
In libsql-server, raw db names are uuids that need to be quoted,
so that needs to be supported in the ATTACH layer.
As a bonus, "names" that are actually file system paths are refused
to prevent abuse.
* libsql-server: drop stray serde(default) from allow_attach
* libsql-replication: update proto files
* libsql-replication: regenerate protobuf
* tests: move attach to its own test
* libsql-replication: fix proto number after rebase
This adds a new `Builder` type that can now be used to construct the
`Database` type. This will scale better as we add more varied options.
This commit also deprecates the old builder types and will produce a
warning that will push users to using the new `Builder` type. This will
then allow us to remove the old deprecated constructors at some point in
the future.
This PR adds a new internal metadata store for namespace configuration.
This internally uses a normal namespace so that the replica also get's
synchronized. This is just initial work there are a few more issues to
solve regarding replica's getting updated configs and some internal
hardening that needs to be done. Tracking issue for follow up work #768.
Closes#501
