Made installer not install on SQLite less than 3.3.7, would prevent stuff like bug 25746. Also, threw MSSQL out of release notes - it can't be installed through the usual means.

RELEASE-NOTES-1.19

@@ -295,13 +295,13 @@ MediaWiki 1.19 requires PHP 5.2.3. PHP 4 is no longer supported.
 
 MySQL is the recommended DBMS. PostgreSQL or SQLite can also be used, but
 support for them is somewhat less mature. There is experimental support for IBM
-DB2 and Microsoft SQL Server.
+DB2 and Oracle.
 
 The supported versions are:
 
 * MySQL 5.0.2 or later
 * PostgreSQL 8.3 or later
-* SQLite 3
+* SQLite 3.3.7 or later
 * Oracle 9.0.1 or later
 
 == Upgrading ==

includes/installer/DatabaseInstaller.php

@@ -54,6 +54,15 @@ abstract class DatabaseInstaller {
 	 */
 	public abstract function isCompiled();
 
+	/**
+	 * Checks for installation prerequisites other than those checked by isCompiled()
+	 * @since 1.19
+	 * @return Status
+	 */
+	public function checkPrerequisites() {
+		return Status::newGood();
+	}
+
 	/**
 	 * Get HTML for a web form that configures this database. Configuration
 	 * at this time should be the minimum needed to connect and test

includes/installer/Installer.i18n.php

@@ -103,6 +103,7 @@ The following database types are supported: $1.
 If you are on shared hosting, ask your hosting provider to install a suitable database driver.
 If you compiled PHP yourself, reconfigure it with a database client enabled, for example using <code>./configure --with-mysql</code>.
 If you installed PHP from a Debian or Ubuntu package, then you also need install the php5-mysql module.',
+	'config-outdated-sqlite'          => "'''Warning''': you have SQLite $1, which is lower than minimum required version $2. SQLite will be unavailable.",
 	'config-no-fts3'                  => "'''Warning''': SQLite is compiled without the [//sqlite.org/fts3.html FTS3 module], search features will be unavailable on this backend.",
 	'config-register-globals'         => "'''Warning: PHP's <code>[http://php.net/register_globals register_globals]</code> option is enabled.'''
 '''Disable it if you can.'''

includes/installer/Installer.php

@@ -634,19 +634,32 @@ abstract class Installer {
 			$allNames[] = wfMsg( "config-type-$name" );
 		}
 
-		if ( !$this->getVar( '_CompiledDBs' ) ) {
+		// cache initially available databases to make sure that everything will be displayed correctly
+		// after a refresh on env checks page
+		$databases = $this->getVar( '_CompiledDBs-preFilter' );
+		if ( !$databases ) {
+			$databases = $this->getVar( '_CompiledDBs' );
+			$this->setVar( '_CompiledDBs-preFilter', $databases );
+		}
+
+		$databases = array_flip ( $databases );
+		foreach ( array_keys( $databases ) as $db ) {
+			$installer = $this->getDBInstaller( $db );
+			$status = $installer->checkPrerequisites();
+			if ( !$status->isGood() ) {
+				$this->showStatusMessage( $status );
+			}
+			if ( !$status->isOK() ) {
+				unset( $databases[$db] );
+			}
+		}
+		$databases = array_flip( $databases );
+		if ( !$databases ) {
 			$this->showError( 'config-no-db', $wgLang->commaList( $allNames ) );
 			// @todo FIXME: This only works for the web installer!
 			return false;
 		}
-
-		// Check for FTS3 full-text search module
-		$sqlite = $this->getDBInstaller( 'sqlite' );
-		if ( $sqlite->isCompiled() ) {
-			if( DatabaseSqlite::getFulltextSearchModule() != 'FTS3' ) {
-				$this->showMessage( 'config-no-fts3' );
-			}
-		}
+		$this->setVar( '_CompiledDBs', $databases );
 	}
 
 	/**

includes/installer/SqliteInstaller.php

@@ -13,6 +13,7 @@
  * @since 1.17
  */
 class SqliteInstaller extends DatabaseInstaller {
+	const MINIMUM_VERSION = '3.3.7';
 
 	/**
 	 * @var DatabaseSqlite
@@ -32,6 +33,24 @@ class SqliteInstaller extends DatabaseInstaller {
 		return self::checkExtension( 'pdo_sqlite' );
 	}
 
+	/**
+	 *
+	 * @return Status:
+	 */
+	public function checkPrerequisites() {
+		$result = Status::newGood();
+		// Bail out if SQLite is too old
+		$db = new DatabaseSqliteStandalone( ':memory:' );
+		if ( version_compare( $db->getServerVersion(), self::MINIMUM_VERSION, '<' ) ) {
+			$result->fatal( 'config-outdated-sqlite', $db->getServerVersion(), self::MINIMUM_VERSION );
+		}
+		// Check for FTS3 full-text search module
+		if( DatabaseSqlite::getFulltextSearchModule() != 'FTS3' ) {
+			$result->warning( 'config-no-fts3' );
+		}
+		return $result;
+	}
+
 	public function getGlobalDefaults() {
 		if ( isset( $_SERVER['DOCUMENT_ROOT'] ) ) {
 			$path = str_replace(