* Made PG throw a DBQueryError when it gets a query error, instead of DBUnexpectedError. Apparently this mistake goes back to r14625, when exceptions were first introduced. Did it by removing reportQueryError(), the DatabaseBase version works fine.
* Fixed several places where there was an attempt to check for a query error by checking if the result of query() was false. This never worked. Used try/catch instead.
* Made the DBConnectionError messages go on one line so that they don't mess up the formatting in the installer.
* In DatabasePostgres::selectDB(), only disconnect and reconnect if the DB name is actually changing.
* Made DatabasePostgres::schemaExists() less weird and scary.
* Added DatabasePostgres::roleExists() for use by the installer.
* Removed the PostgreSQL-specific hack to make _InstallUser have a default other than "root". Made _InstallUser into a proper DBMS-specific internal variable instead, since every DBMS we support so far needs a different default.
* Removed the $dbName parameters from openConnection/getConnection, and got rid of $this->useAdmin. Implemented a more sophisticated caching scheme instead. Partial revert of r89389 and r81440.
* When connecting as the install user before DB creation, and when testing the web user's credentials, try a few different database names and use whichever one works.
* Instead of connecting as the web user to create tables, I used SET ROLE. It seems cleaner and more like what the other DBMSes do during installation. "SET ROLE wikiuser" requires the same privileges as "CREATE SCHEMA ... AUTHORIZATION wikiuser", so it's unlikely to break anything.
* In the area of web account creation, fixed various minor logic errors and introduced more informative error messages at the submit stage, pre-install. Show a helpful error message if the web user exists already and the install user can't do the relevant SET ROLE.
* Split schema creation out to a separate install step.
* When creating an account as a non-superuser, add the administrative account to the new account's group. This is necessary to avoid a fatal error during installation (bug 28845).
* Removed code which alters an existing web user to have appropriate search paths and permissions. This may break other apps and is not necessary. As in other DBMSes, If the web user exists, it is the responsibility of the sysadmin to ensure that it has appropriate permissions.
* Rewrote setupPLpgSQL() to use the query builder functions.
** Moved the responsibility for calling setupSchemaVars() on install to the DatabaseInstaller subclass. This allows it to be called after setupDatabase() has completed, as required by Oracle and PostgreSQL.
** Fixed OracleInstaller::getConnection() so that it respects $this->useSysDBA correctly.
** In OracleInstaller, added some more variables to the list of schema vars, which are needed by user.sql and tables.sql
** In SearchOracle, specify the database name when calling ctx_ddl.sync_index(). This fixes a fatal error in the createMainpage step, caused by the schema name not being equal to the current user.
* In oracle/tables.sql, fixed a couple of indexes with missing table prefixes.
* Improved debugging output in DatabaseInstaller::getConnection() and Installer::createMainpage().
* In DatabaseBase::selectDB(), set $this->mDBname correctly, as in DatabaseMysql.
* Fixed a bug causing the engine and charset settings to not be properly preserved when adding new tables on upgrade.
* Fixed total breakage of SQLite upgrade, by reusing the administrative connection to the SQLite database instead of creating a new one when wfGetDB() is called. Added LBFactory_Single to support this.
* Introduced a "schema variable" concept to DatabaseBase to avoid the use of globals for communication between the installer and the Database. Removed a lot of old global variable names from Database::replaceVars(), most were only added on a whim and were never used.
* Introduced DatabaseInstaller::getSchemaVars(), to allow schema variables to be supplied by the DatabaseInstaller child classes.
* Removed messages config-mysql-egine-mismatch [sic] and config-mysql-charset-mismatch. In the old installer it was possible for users to request a certain character set for an upgrade, but in the new installer the question is never asked. So these warnings were shown whenever a non-default character set or engine was used in the old database.
* In MysqlInstaller::preUpgrade(), fixed the incorrect strings used to identify the MySQL character sets: mysql5 instead of utf8 and mysql5-binary instead of binary.
* On install, initialise the site_stats table, using code copied from the old installer. Unlike the old installer, use SiteStats to increment the user count when the initial user is added.
* Fixed several instances of inappropriate call-by-reference.
* Replaced call_user_func_array() with call_user_func() where possible, it is shorter and simpler.
* Moved the caching boilerplate for DatabaseInstaller::getConnection() to the base class, and have the derived classes override an uncached function openConnection() instead. Updates r80892.
* In MysqlInstaller::getLocalSettings(), escape PHP strings correctly with LocalSettingsGenerator::escapePhpString().
* Reduce timeout for checks in dirIsExecutable() to 3 seconds, so that it doesn't take 30s to run when apache is in single-threaded mode for debugging.
* MySQL and SQLite have been tested and they appear to work. PostgreSQL upgrade is totally broken, apparently it was like that before I started. The Oracle code is untested.
* Added associated files for tooltip display
* Added associated css rules for tooltip display
* Updated installer's help system in (most?) places to display help as tooltips instead of show/hide system
* Beginnings of visual changes (e.g., less boxes, more color)
* Modified several of the installer's widget display methods
* Added a couple new i18n values
* Fixed small bug in installer logic:
- Password validation on new users was being executed even if there wasn't a $user object
* added Main Page creation within install
* added MEDIAWIKI_INSTALL constant; some scripts still use it
* started OracleUpgrader scripts for upgrade from 1.16
* fixed some not null defaults that comply with mysql data type default on not null fields
* FKs made defferable
* Add Status::getWikiTextArray() to allow different ways of formating a bunch of status messages (e.g. CLI output)
* Clean up messages in CliInstaller, use more i18n
* Use warning messages from Status return object in CLI installer
* Make Installer::isCompiled static so we don't have to create an object just to see that we can't use it.
* Add Installer::addInstallStepFollowing so we don't have MySQLInstaller mucking in its parent's data
* This is not complete yet, and should not be used outside of testing. Using it on a production database may ruin everything. This is the reason for the second entry point of new-index.php. You've been warned.
* Known issues are at [[mw:New-installer_issues]]. Please add new items to the list if you find them.
