EN: Retroactively "repair" broken database entries to a sane default value

            db.execSQL("CREATE INDEX IF NOT EXISTS index_${TABLE_TEK_CHECK_FILE_MATCH}_tcfid ON $TABLE_TEK_CHECK_FILE_MATCH(tcfid);")

            db.execSQL("CREATE INDEX IF NOT EXISTS index_${TABLE_TEK_CHECK_FILE_MATCH}_key ON $TABLE_TEK_CHECK_FILE_MATCH(keyData, rollingStartNumber, rollingPeriod);")

        }

        if (oldVersion < 6) {

            Log.d(TAG, "Fixing invalid rssi values from previous database version")

            // There's no bluetooth chip with a sensitivity that would result in rssi -200, so this would be invalid.

            // RSSI of -100 is already extremely low and thus is a good "default" value

            db.execSQL("UPDATE $TABLE_ADVERTISEMENTS SET rssi = -100 WHERE rssi < -200;")

        }

        Log.d(TAG, "Finished database upgrade")

    }

    companion object {

        private const val DB_NAME = "exposure.db"

        private const val DB_VERSION = 5

        private const val DB_VERSION = 6

        private const val DB_SIZE_TOO_LARGE = 256L * 1024 * 1024

        private const val MAX_DELETE_TIME = 5000L

        private const val TABLE_ADVERTISEMENTS = "advertisements"