public function __construct( $args, $PLSQLMode = false ) {
		global $wgExSql2WikiDatabases;

		$this->mArgs = $args;
		$this->mPLSQLMode = $PLSQLMode;

		if ( !isset( $this->mArgs["database"] ) || !isset( $wgExSql2WikiDatabases[$this->mArgs["database"]] ) ) 
			throw new Exception( wfMsgForContent( 'sql2wiki-err-invalid_db_id' ) );
			
		$lastError = null;
		try {
			wfSuppressWarnings();
			$db = $wgExSql2WikiDatabases[$this->mArgs["database"]];
			$this->mDBType = $db['type'];
			$this->mDB = Database::newFromType( $this->mDBType, $db );
			wfRestoreWarnings();
		} catch ( Exception $ex) {
			$lastError = $ex->getMessage();
		}
		
		if ( $lastError == null && !$this->mDB->isOpen() ) {
			$lastError = $this->mDB->lastError();
		}
		
		if ( $lastError != null ) {
			throw new Exception( wfMsgForContent( 'sql2wiki-err-failed_to_connect',  $this->mArgs["database"] ) . "<br />\n$lastError" );
		}
	}