HarmonyOS 鸿蒙Next如何修改云数据库中存储的对象某一条属性的值

----使用相同主键存储，数据库正常是会识别成 数据update更新了呀，数据更新成新的数据，是正常逻辑

----如果只要更新具体属性值，那么需要指出具体更新的属性，及属性值

可以参考这里：https://developer.huawei.com/consumer/cn/doc/AppGallery-connect-Guides/agc-clouddb-otheroperations-serverjava-0000001569826505#section1469101023114

public void updateBookInfo() {
    
    if (mCloudDBZone == null) {
        LOGGER.warn("CloudDBClient is null, try re-initialize it");
        return;
    }
    try {
        CloudDBZoneObjectOperator<BookInfo> operator = CloudDBZoneObjectOperator.build(BookInfo.class);
        operator = operator.increment(BookEditFields.PRICE, 38.8);
        operator.update(BookEditFields.PUBLISHER, "xxx");
        CloudDBZoneObjectOperatorConstraint<BookInfo> constraint =
            CloudDBZoneObjectOperatorConstraint.where(BookInfo.class);
        constraint.greaterThanOrEqualTo(BookEditFields.ID, 10).lessThan(BookEditFields.ID, 20);
        CompletableFuture<Integer> completableFuture = cloudDBZone.executeBatchUpdateByCondition(operator, constraint);
        LOGGER.info("UpdateBookInfo number: " + completableFuture.get());
    } catch (AGConnectCloudDBException | ExecutionException | InterruptedException e) {
        LOGGER.warn("updateBookInfo: " + e.getMessage());
    }
}