LoadBalancer uses Database::getDomainId() for deciding which keys to use
in the foreign connection handle arrays. This method should reflect any
changes made to the DB selection.
If the query fails, then do not change domain field. This is the sort of
approach that LoadBalancer is expects in openForeignConnection(). Also,
throw an exception when selectDB() fails.
The db/schema/prefix fields of Database no longer exist in favor of just
using the newer currentDomain field.
Also:
* Add IDatabase::selectDomain() method and made selectDB() wrap it.
* Extract the DB name from sqlite files if not explicitly provided.
* Fix inconsistent open() return values from Database subclasses.
* Make a relationSchemaQualifier() method to handle the concern of
omitting schema names in queries. The means that getDomainId() can
still return the right value, rather than confusingly omitt the schema.
* Make RevisionStore::checkDatabaseWikiId() account for the domain schema.
Unlike d2a4d614fc, this does not incorrectly assume the storage is
always for the current wiki domain. Also, LBFactorySingle sets the local
domain so it is defined even in install.php.
* Make RevisionStoreDbTestBase actually set the LoadBalancer local domain.
* Make RevisionTest::testLoadFromTitle() account for the domain schema.
Bug: T193565
Change-Id: I6e51cd54c6da78830b38906b8c46789c79498ab5
With a separate service for each of the NameTableStore tables, it
wasn't possible to instantiate a NameTableStore for a foreign wiki,
leading to the inelegant situation of having RevisionStoreFactory
construct a new NameTableStoreFactory every time a RevisionStore for a
foreign wiki was requested. These NameTableStore objects were not
tracked in any structured way, so there was no way to reset them for
tests.
So, introduce NameTableStoreFactory, which tracks object instances for
both local and remote table access.
This also avoids having schema details in ServiceWiring.php.
Depends-On: I5c78cfb8bf90eca935a3264592366f63517c4fad
Bug: T202641
Change-Id: Ic0f2d1d94bad9dcc047ff19a1f92db89b7e014ce
