def listAllFiles(self, clean = False):
	dbLog.log(ETP_LOGPRI_INFO,ETP_LOGLEVEL_VERBOSE,"listAllFiles: called.")
	self.cursor.execute('SELECT file FROM content')
	if clean:
            os.system("echo a")
            my = set()
            for row in self.cursor:
                my.add(row[0])
	    #my = self.cursor.fetchall()
            os.system("echo b")
            return my