Only seemingly supported by MySQL, and likely a seldom used function
Not worth trying to support it, as other non mysql db's would need workarounds, and that's just not happening
* CloneDatabase - already droping tables in internal function, removed duplicate action
* DatabaseOracle - stopped ignoring "temporary" parameter
* added two parameters to phpunit (use-normal-tables & reuse-db), default actions stay the same
* with reuse-db oracle phpunit test run on oracle down to 1m 20s ;)
* Merged the 4 simulated implementations of Database*::replace(). I took diffs, they were nearly identical. I made one based on the IBM DB2 version, since it used insert() which looked like a nice touch.
* Provided the non-simulated implementation of Database*::replace() via a protected member function, and made DatabaseMysql::replace() and DatabaseSqlite::replace() into a wrapper for it.
* Moved the MySQL-specific functionality from masterPosWait(), getSlavePos() and getMasterPos() from DatabaseBase to DatabaseMysql.
* Renamed getStatus() to getMysqlStatus() and moved it to DatabaseMysql. Removed "unimplemented" errors from two other subclasses. Really there's no way another DBMS could or should implement this function.
* Split the LoadMonitor class into a no-op class and a MySQL-specific class, to avoid fatal errors due to the getMysqlStatus() call if other DBMSs tried to use LoadBalancer with multiple servers. Of course there are lots of other reasons it won't work, I'm just fixing the architecture issue here.
And while I have a replicated test setup handy:
* On MySQL 4.1.9 and later, use SHOW SLAVE STATUS to get the lag instead of SHOW PROCESSLIST. This has the advantage of reading zero when there are no events for a while.
* Reverted the public -> protected changes from r90429, except for doQuery() after a review of usage:
** resultObject() is used by lots of things in core and extensions.
** makeSelectOptions() is used by SMW, and if that's going to be public, the other two probably should be too, for consistency.
** doQuery() was used by several things, but mostly by mistake. It's been marked private since r21359 which is before almost all of them. I updated the callers to use query().
* Added "protected" to doQuery() declarations in other database classes.
* fixed sequence handling when using DB prefix
* deferring constraints on transaction, switching back to immediate on commit/rollback
* hardcoded NLS_NUMERIC_CHARACTERS as it breaks using floats in sql if connection is in a non-US-like NLS_LANG (all vars are bound as chars)
* fixed tableExists to handle possible username-dbname difference
* added indexExists for updater
* fixed a bug in DatabaseUpdater
* tried not to produce bugs (may have failed)
* quoting objects in Oracle is poorly supported prior to 10g (it still has bugs in 10g) so i wish to avoid it for as long as possible
* i've added /*Q*/ marker to avoid double-prefixing of table names
* tableName quoted parameter is usable only in cases where you call it directly in functions where it might occur that tableName can get called twice it is unusable as the tableName gets prefixed twice
Oracle documentation is generally crappy. They claim a lot of things but some of those claims depend on a gazillion of factors and in case of one of this factors being a bit off have no general solution. Object name quoting is one of such things and is general practice amongst oracle DBAs that if you write the code directly you can use them but if you write abstracted or embedded code it's best to stay away if you can.
It is now duplicateTableStructure() duty to addIdentifierQuotes() them.
Fixed bug for mysql < 4.1 where the new name would be quoted twice.
Always quote identifier in Oracle, doing otherwise seems a bug (can someone confirm?)
This fixes bug in DatabaseOracle.php tableName() on line 671 and allows it to call
the parent implementation instead of copying it with different quotes.
Adapt Mssql addIdentifierQuotes(). Replace its addIdentifierQuotes calls with addQuotes
as it's what it really is. The serialize() is probably unneeded, since I don't think it will
ever be called with objects but I kept it anyway.
** 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.
