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!5386 回流相关修改同步&删除英文Sample（英文不用添加Sample）：无需翻译 

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en/application-dev/database/database-distributedobject-guidelines.md
浏览文件 @ a7bbbb30
......@@ -171,12 +171,4 @@ The following example shows how to implement a distributed data object synchroni
```js
local_object.setSessionId("");
```
## Samples
The following example is provided for you to better understand the development of distributed data objects:
- [Distributed Notepad](https://gitee.com/openharmony/distributeddatamgr_objectstore/tree/master/samples/distributedNotepad)
When an event of the Notepad app occurs on a device, such as a note is added, the tile or content of a note is changed, or the event list is cleared, the change will be synchronized to other devices in the trusted network.
en/application-dev/database/database-mdds-guidelines.md
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......@@ -175,7 +175,3 @@ The following uses a single KV store as an example to describe the development p
}
});
```
## Samples
The following samples are provided to help you better understand the distributed data development:
- [`KvStore`: Distributed Data Management (eTS) (API8)](https://gitee.com/openharmony/app_samples/tree/master/data/Kvstore)
- [Distributed Data Service](https://gitee.com/openharmony/codelabs/tree/master/Data/JsDistributedData)
en/application-dev/database/database-relational-guidelines.md
浏览文件 @ a7bbbb30
......@@ -44,7 +44,7 @@ The RDB provides APIs for inserting, deleting, updating, and querying data in th
| Class| API| Description|
| -------- | -------- | -------- |
| RdbStore | update(values:&nbsp;ValuesBucket,&nbsp;rdbPredicates:&nbsp;RdbPredicates,&nbsp;callback:&nbsp;AsyncCallback&lt;number&gt;):void | Updates data in the RDB store based on the specified **RdbPredicates** object. This method uses a callback to return the result.<br>-&nbsp;**values**: data to update, which is stored in a **ValuesBucket**.<br>-&nbsp;**rdbPredicates**: conditions for updating data.<br>-&nbsp;**callback**: callback invoked to return the number of rows updated.|
| RdbStore | update(values:&nbsp;ValuesBucket,&nbsp;rdbPredicates:&nbsp;RdbPredicates):&nbsp;Promise | Updates data in the RDB store based on the specified **RdbPredicates** object. This method uses a promise to return the result.<br>-&nbsp;**values**: data to update, which is stored in a **ValuesBucket**.<br>-&nbsp;**rdbPredicates**: conditions for updating data.|
| RdbStore | update(values:&nbsp;ValuesBucket,&nbsp;rdbPredicates:&nbsp;RdbPredicates):&nbsp;Promise\<number> | Updates data in the RDB store based on the specified **RdbPredicates** object. This method uses a promise to return the result.<br>-&nbsp;**values**: data to update, which is stored in a **ValuesBucket**.<br>-&nbsp;**rdbPredicates**: conditions for updating data.|
- **Deleting data**
......@@ -55,7 +55,7 @@ The RDB provides APIs for inserting, deleting, updating, and querying data in th
| Class| API| Description|
| -------- | -------- | -------- |
| RdbStore | delete(rdbPredicates:&nbsp;RdbPredicates,&nbsp;callback:&nbsp;AsyncCallback&lt;number&gt;):void | Deletes data from the RDB store based on the specified **RdbPredicates** object. This method uses a callback to return the result.<br>-&nbsp;**rdbPredicates**: conditions for deleting data.<br>-&nbsp;**callback**: callback invoked to return the number of rows deleted.|
| RdbStore | delete(rdbPredicates:&nbsp;RdbPredicates):&nbsp;Promise | Deletes data from the RDB store based on the specified **RdbPredicates** object. This method uses a promise to return the result.<br>-&nbsp;**rdbPredicates**: conditions for deleting data.|
| RdbStore | delete(rdbPredicates:&nbsp;RdbPredicates):&nbsp;Promise\<number> | Deletes data from the RDB store based on the specified **RdbPredicates** object. This method uses a promise to return the result.<br>-&nbsp;**rdbPredicates**: conditions for deleting data.|
- **Querying data**
......@@ -81,7 +81,7 @@ The RDB provides **RdbPredicates** for you to set database operation conditions.
| Class| API| Description|
| -------- | -------- | -------- |
| RdbPredicates |inDevices(devices: Array<string>): RdbPredicates | Specifies remote devices on the network with RDB stores to be synchronized.<br>-&nbsp;**devices**: IDs of the remote devices on the network.<br>-&nbsp;**RdbPredicates**: returns a **RdbPredicates** object that matches the specified field.|
| RdbPredicates |inDevices(devices: Array\<string>): RdbPredicates | Specifies remote devices on the network with RDB stores to be synchronized.<br>-&nbsp;**devices**: IDs of the remote devices on the network.<br>-&nbsp;**RdbPredicates**: returns a **RdbPredicates** object that matches the specified field.|
| RdbPredicates |inAllDevices(): RdbPredicates | Connects to all remote devices on the network with RDB stores to be synchronized.<br>-&nbsp;**RdbPredicates**: returns a **RdbPredicates** object that matches the specified field.|
| RdbPredicates | equalTo(field:&nbsp;string,&nbsp;value:&nbsp;ValueType):&nbsp;RdbPredicates | Sets the **RdbPredicates** to match the field with data type **ValueType** and value equal to the specified value.<br>-&nbsp;**field**: column name in the database table.<br>-&nbsp;**value**: value specified.<br>-&nbsp;**RdbPredicates**: returns a **RdbPredicates** object that matches the specified field.|
| RdbPredicates | notEqualTo(field:&nbsp;string,&nbsp;value:&nbsp;ValueType):&nbsp;RdbPredicates | Sets the **RdbPredicates** to match the field with data type **ValueType** and value not equal to the specified value.<br>-&nbsp;**field**: column name in the database table.<br>-&nbsp;**value**: value specified.<br>-&nbsp;**RdbPredicates**: returns a **RdbPredicates** object that matches the specified field.|
......@@ -116,7 +116,7 @@ The RDB provides **RdbPredicates** for you to set database operation conditions.
A result set can be regarded as a row of data in the queried results. It allows you to traverse and access the data you have queried. The following table describes the external APIs of **ResultSet**.
> ![icon-notice.gif](public_sys-resources/icon-notice.gif) **NOTICE**<br>
> **NOTICE**<br>
> After a result set is used, you must call the **close()** method to close it explicitly.
**Table 7** APIs for using the result set
......@@ -147,8 +147,8 @@ A result set can be regarded as a row of data in the queried results. It allows
| Class| API| Description|
| -------- | -------- | -------- |
| RdbStore | setDistributedTables(tables: Array<string>, callback: AsyncCallback<void>): void;| Sets a list of distributed tables. This method uses a callback to return the result.<br>- &nbsp;**tables**: names of the distributed tables to set.<br>-&nbsp;**callback**: callback invoked to return the result.|
| RdbStore | setDistributedTables(tables: Array<string>): Promise<void>; | Sets a list of distributed tables. This method uses a promise to return the result.<br>- &nbsp;**tables**: names of the distributed tables to set.|
| RdbStore | setDistributedTables(tables: Array\<string>, callback: AsyncCallback\<void>): void| Sets a list of distributed tables. This method uses a callback to return the result.<br>- &nbsp;**tables**: names of the distributed tables to set.<br>-&nbsp;**callback**: callback invoked to return the result.|
| RdbStore | setDistributedTables(tables: Array\<string>): Promise\<void> | Sets a list of distributed tables. This method uses a promise to return the result.<br>- &nbsp;**tables**: names of the distributed tables to set.|
**Obtaining the Distributed Table Name for a Remote Device**
......@@ -158,8 +158,8 @@ You can obtain the distributed table name for a remote device based on the local
| Class| API| Description|
| -------- | -------- | -------- |
| RdbStore | obtainDistributedTableName(device: string, table: string, callback: AsyncCallback<string>): void; | Obtains the distributed table name for a remote device based on the local table name. The distributed table name is used to query the RDB store of the remote device. This method uses a callback to return the result.<br>-&nbsp;**device**: remote device.<br>- &nbsp;**table**: local table name.<br>- &nbsp;**callback**: callback used to return the result. If the operation is successful, the distributed table name of the remote device will be returned. |
| RdbStore | obtainDistributedTableName(device: string, table: string): Promise<string>; | Obtains the distributed table name for a remote device based on the local table name. The distributed table name is used to query the RDB store of the remote device. This method uses a promise to return the result.<br>-&nbsp;**device**: remote device.<br>- &nbsp;**table**: local table name.|
| RdbStore | obtainDistributedTableName(device: string, table: string, callback: AsyncCallback\<string>): void | Obtains the distributed table name for a remote device based on the local table name. The distributed table name is used to query the RDB store of the remote device. This method uses a callback to return the result.<br>-&nbsp;**device**: remote device.<br>- &nbsp;**table**: local table name.<br>- &nbsp;**callback**: callback used to return the result. If the operation is successful, the distributed table name of the remote device will be returned. |
| RdbStore | obtainDistributedTableName(device: string, table: string): Promise\<string> | Obtains the distributed table name for a remote device based on the local table name. The distributed table name is used to query the RDB store of the remote device. This method uses a promise to return the result.<br>-&nbsp;**device**: remote device.<br>- &nbsp;**table**: local table name.|
**Synchronizing Data Between Devices**
......@@ -167,8 +167,8 @@ You can obtain the distributed table name for a remote device based on the local
| Class| API| Description|
| -------- | -------- | -------- |
| RdbStore | sync(mode: SyncMode, predicates: RdbPredicates, callback: AsyncCallback<Array<[string, number]>>): void;| Synchronizes data between devices. This method uses a callback to return the result.<br>-&nbsp;**mode**: data synchronization mode. **SYNC\_MODE\_PUSH** means to push data from the local device to a remote device. **SYNC\_MODE\_PULL** means to pull data from a remote device to the local device.<br>-&nbsp;**predicates**: data and devices to be synchronized.<br>-&nbsp;**callback**: callback invoked to return the result. In the result, **string** indicates the device ID, and **number** indicates the synchronization status of each device. The value **0** indicates a success, and other values indicate a failure.|
| RdbStore | sync(mode: SyncMode, predicates: RdbPredicates): Promise<Array<[string, number]>>;| Synchronizes data between devices. This method uses a promise to return the result.<br>-&nbsp;**mode**: data synchronization mode. **SYNC\_MODE\_PUSH** means to push data from the local device to a remote device. **SYNC\_MODE\_PULL** means to pull data from a remote device to the local device.<br>-&nbsp;**predicates**: data and devices to be synchronized. |
| RdbStore | sync(mode: SyncMode, predicates: RdbPredicates, callback: AsyncCallback<Array<[string, number]>>): void| Synchronizes data between devices. This method uses a callback to return the result.<br>-&nbsp;**mode**: data synchronization mode. **SYNC\_MODE\_PUSH** means to push data from the local device to a remote device. **SYNC\_MODE\_PULL** means to pull data from a remote device to the local device.<br>-&nbsp;**predicates**: data and devices to be synchronized.<br>-&nbsp;**callback**: callback invoked to return the result. In the result, **string** indicates the device ID, and **number** indicates the synchronization status of each device. The value **0** indicates a success, and other values indicate a failure.|
| RdbStore | sync(mode: SyncMode, predicates: RdbPredicates): Promise<Array<[string, number]>>| Synchronizes data between devices. This method uses a promise to return the result.<br>-&nbsp;**mode**: data synchronization mode. **SYNC\_MODE\_PUSH** means to push data from the local device to a remote device. **SYNC\_MODE\_PULL** means to pull data from a remote device to the local device.<br>-&nbsp;**predicates**: data and devices to be synchronized. |
**Registering an RDB Store Observer**
......@@ -176,7 +176,7 @@ You can obtain the distributed table name for a remote device based on the local
| Class| API| Description|
| -------- | -------- | -------- |
| RdbStore |on(event: 'dataChange', type: SubscribeType, observer: Callback<Array<string>>): void;| Registers an observer for this RDB store to subscribe to distributed data changes. When data in the RDB store changes, a callback will be invoked to return the data changes.<br>-&nbsp;**type**: subscription type. **SUBSCRIBE\_TYPE\_REMOTE** means to subscribe to remote data changes.<br>-&nbsp;**observer**: observer that listens for data changes in the RDB store.|
| RdbStore |on(event: 'dataChange', type: SubscribeType, observer: Callback<Array\<string>>): void| Registers an observer for this RDB store to subscribe to distributed data changes. When data in the RDB store changes, a callback will be invoked to return the data changes.<br>-&nbsp;**type**: subscription type. **SUBSCRIBE\_TYPE\_REMOTE** means to subscribe to remote data changes.<br>-&nbsp;**observer**: observer that listens for data changes in the RDB store.|
**Unregistering an RDB Store Observer**
......@@ -184,7 +184,7 @@ You can obtain the distributed table name for a remote device based on the local
| Class| API| Description|
| -------- | -------- | -------- |
| RdbStore |off(event:'dataChange', type: SubscribeType, observer: Callback<Array<string>>): void;| Unregisters the observer of the specified type for the RDB store. This method uses a callback to return the result.<br>- &nbsp;**type**: subscription type. **SUBSCRIBE\_TYPE\_REMOTE** means to subscribe to remote data changes.<br>- &nbsp;**observer**: observer to unregister.|
| RdbStore |off(event:'dataChange', type: SubscribeType, observer: Callback<Array\<string>>): void| Unregisters the observer of the specified type for the RDB store. This method uses a callback to return the result.<br>- &nbsp;**type**: subscription type. **SUBSCRIBE\_TYPE\_REMOTE** means to subscribe to remote data changes.<br>- &nbsp;**observer**: observer to unregister.|
## How to Develop
......@@ -306,8 +306,3 @@ You can obtain the distributed table name for a remote device based on the local
let tableName = rdbStore.obtainDistributedTableName(deviceId, "test");
let resultSet = rdbStore.querySql("SELECT * FROM " + tableName)
```
## Samples
The following samples are provided for you to better understand the RDB development:
- [`Rdb`: eTS RDB (API8)](https://gitee.com/openharmony/app_samples/tree/master/data/Rdb)
- [`DistributedRdb`: eTS Distributed Relational Database (API8)](https://gitee.com/openharmony/app_samples/tree/master/data/DistributedRdb)
- [Relational Database](https://gitee.com/openharmony/codelabs/tree/master/Data/JSRelationshipData)
en/application-dev/windowmanager/window-guidelines.md
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......@@ -101,4 +101,3 @@ try {
}
```
For the complete code, see [immersive](https://gitee.com/openharmony/windowmanager/tree/master/AppDemo/window/immersive).
zh-cn/application-dev/database/database-relational-guidelines.md
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......@@ -44,7 +44,7 @@
| 类名 | 接口名 | 描述 |
| -------- | -------- | -------- |
| RdbStore | update(values:&nbsp;ValuesBucket,&nbsp;rdbPredicates:&nbsp;RdbPredicates,&nbsp;callback:&nbsp;AsyncCallback&lt;number&gt;):void | 根据RdbPredicates的指定实例对象更新数据库中的数据，结果以callback形式返回。<br/>-&nbsp;values：以ValuesBucket存储的要更新的数据。<br/>-&nbsp;rdbPredicates：表示RdbPredicates的实例对象指定的更新条件。<br/>-&nbsp;callback：指定的callback回调方法。返回受影响的行数。 |
| RdbStore | update(values:&nbsp;ValuesBucket,&nbsp;rdbPredicates:&nbsp;RdbPredicates):&nbsp;Promise | 根据RdbPredicates的指定实例对象更新数据库中的数据，结果以Promise形式返回。<br/>-&nbsp;values：以ValuesBucket存储的要更新的数据。<br/>-&nbsp;rdbPredicates：表示RdbPredicates的实例对象指定的更新条件。 |
| RdbStore | update(values:&nbsp;ValuesBucket,&nbsp;rdbPredicates:&nbsp;RdbPredicates):&nbsp;Promise\<number> | 根据RdbPredicates的指定实例对象更新数据库中的数据，结果以Promise形式返回。<br/>-&nbsp;values：以ValuesBucket存储的要更新的数据。<br/>-&nbsp;rdbPredicates：表示RdbPredicates的实例对象指定的更新条件。 |
- **删除**
......@@ -55,7 +55,7 @@
| 类名 | 接口名 | 描述 |
| -------- | -------- | -------- |
| RdbStore | delete(rdbPredicates:&nbsp;RdbPredicates,&nbsp;callback:&nbsp;AsyncCallback&lt;number&gt;):void | 根据rdbPredicates的指定实例对象从数据库中删除数据，结果以callback形式返回。<br/>-&nbsp;rdbPredicates：RdbPredicates的实例对象指定的删除条件。<br/>-&nbsp;callback：指定callback回调函数。返回受影响的行数。 |
| RdbStore | delete(rdbPredicates:&nbsp;RdbPredicates):&nbsp;Promise | 根据rdbPredicates的指定实例对象从数据库中删除数据，结果以Promise形式返回。<br/>-&nbsp;rdbPredicates：RdbPredicates的实例对象指定的删除条件。 |
| RdbStore | delete(rdbPredicates:&nbsp;RdbPredicates):&nbsp;Promise\<number> | 根据rdbPredicates的指定实例对象从数据库中删除数据，结果以Promise形式返回。<br/>-&nbsp;rdbPredicates：RdbPredicates的实例对象指定的删除条件。 |
- **查询**
......@@ -81,7 +81,7 @@
| 类名 | 接口名 | 描述 |
| -------- | -------- | -------- |
| RdbPredicates |inDevices(devices: Array<string>): RdbPredicates | 同步分布式数据库时指定组网内的远程设备。<br/>-&nbsp;devices：组网内指定的远程设备ID。<br/>-&nbsp;RdbPredicates：返回与指定字段匹配的谓词。 |
| RdbPredicates |inDevices(devices: Array\<string>): RdbPredicates | 同步分布式数据库时指定组网内的远程设备。<br/>-&nbsp;devices：组网内指定的远程设备ID。<br/>-&nbsp;RdbPredicates：返回与指定字段匹配的谓词。 |
| RdbPredicates |inAllDevices(): RdbPredicates | 同步分布式数据库时连接到组网内的所有远程设备。<br/>-&nbsp;RdbPredicates：返回与指定字段匹配的谓词。 |
| RdbPredicates | equalTo(field:&nbsp;string,&nbsp;value:&nbsp;ValueType):&nbsp;RdbPredicates | 配置谓词以匹配数据字段为ValueType且值等于指定值的字段。<br/>-&nbsp;field：数据库表中的列名。<br/>-&nbsp;value：指示要与谓词匹配的值。<br/>-&nbsp;RdbPredicates：返回与指定字段匹配的谓词。 |
| RdbPredicates | notEqualTo(field:&nbsp;string,&nbsp;value:&nbsp;ValueType):&nbsp;RdbPredicates | 配置谓词以匹配数据字段为ValueType且值不等于指定值的字段。<br/>-&nbsp;field：数据库表中的列名。<br/>-&nbsp;value：指示要与谓词匹配的值。<br/>-&nbsp;RdbPredicates：返回与指定字段匹配的谓词。 |
......@@ -116,7 +116,7 @@
关系型数据库提供了查询返回的结果集ResultSet，其指向查询结果中的一行数据，供用户对查询结果进行遍历和访问。ResultSet对外API如下所示。
> ![icon-notice.gif](public_sys-resources/icon-notice.gif) **须知：**
> **须知：**
> **结果集使用完后，请一定要调用close方法显式关闭。**
**表7** 结果集API
......@@ -149,8 +149,8 @@
| 类名 | 接口名 | 描述 |
| -------- | -------- | -------- |
| RdbStore | setDistributedTables(tables: Array<string>, callback: AsyncCallback<void>): void;| 设置分布式列表，结果以callback形式返回。<br/>-&nbsp;tables：要设置的分布式列表表名。<br/>-&nbsp;callback：指定callback回调函数。 |
| RdbStore | setDistributedTables(tables: Array<string>): Promise<void>; | 设置分布式列表，结果以Promise形式返回。<br/>-&nbsp;tables：要设置的分布式列表表名。 |
| RdbStore | setDistributedTables(tables: Array\<string>, callback: AsyncCallback\<void>): void | 设置分布式列表，结果以callback形式返回。<br/>-&nbsp;tables：要设置的分布式列表表名。<br/>-&nbsp;callback：指定callback回调函数。 |
| RdbStore | setDistributedTables(tables: Array\<string>): Promise\<void> | 设置分布式列表，结果以Promise形式返回。<br/>-&nbsp;tables：要设置的分布式列表表名。 |
**根据本地表名获取指定远程设备的分布式表名**
......@@ -160,8 +160,8 @@
| 类名 | 接口名 | 描述 |
| -------- | -------- | -------- |
| RdbStore | obtainDistributedTableName(device: string, table: string, callback: AsyncCallback<string>): void; | 根据本地表名获取指定远程设备的分布式表名。在查询远程设备数据库时，需要使用分布式表名, 结果以callback形式返回。<br/>-&nbsp;device：远程设备。<br/>-&nbsp;table：本地表名。<br/>-&nbsp;callback：指定的callback回调函数，如果操作成功，返回远程设备的分布式表名。 |
| RdbStore | obtainDistributedTableName(device: string, table: string): Promise<string>; | 根据本地表名获取指定远程设备的分布式表名。在查询远程设备数据库时，需要使用分布式表名，结果以Promise形式返回。<br/>-&nbsp;device：远程设备。<br/>-&nbsp;table：本地表名。 |
| RdbStore | obtainDistributedTableName(device: string, table: string, callback: AsyncCallback\<string>): void | 根据本地表名获取指定远程设备的分布式表名。在查询远程设备数据库时，需要使用分布式表名, 结果以callback形式返回。<br/>-&nbsp;device：远程设备。<br/>-&nbsp;table：本地表名。<br/>-&nbsp;callback：指定的callback回调函数，如果操作成功，返回远程设备的分布式表名。 |
| RdbStore | obtainDistributedTableName(device: string, table: string): Promise\<string> | 根据本地表名获取指定远程设备的分布式表名。在查询远程设备数据库时，需要使用分布式表名，结果以Promise形式返回。<br/>-&nbsp;device：远程设备。<br/>-&nbsp;table：本地表名。 |
**在设备之间同步数据**
......@@ -169,8 +169,8 @@
| 类名 | 接口名 | 描述 |
| -------- | -------- | -------- |
| RdbStore | sync(mode: SyncMode, predicates: RdbPredicates, callback: AsyncCallback<Array<[string, number]>>): void;| 在设备之间同步数据，结果以callback形式返回。<br/>-&nbsp;mode：指同步模式。SYNC_MODE_PUSH 表示数据从本地设备推送到远程设备；SYNC_MODE_PULL 表示数据从远程设备拉至本地设备。<br/>-&nbsp;predicates：约束同步数据和设备。<br/>-&nbsp;callback：指定的callback回调函数，string：设备ID；number：每个设备同步状态，0表示成功，其他值表示失败。 |
| RdbStore | sync(mode: SyncMode, predicates: RdbPredicates): Promise<Array<[string, number]>>;| 在设备之间同步数据，结果以Promise形式返回。<br/>-&nbsp;mode：指同步模式。SYNC_MODE_PUSH 表示数据从本地设备推送到远程设备；SYNC_MODE_PULL 表示数据从远程设备拉至本地设备。<br/>-&nbsp;predicates：约束同步数据和设备。 |
| RdbStore | sync(mode: SyncMode, predicates: RdbPredicates, callback: AsyncCallback<Array<[string, number]>>): void | 在设备之间同步数据，结果以callback形式返回。<br/>-&nbsp;mode：指同步模式。SYNC_MODE_PUSH 表示数据从本地设备推送到远程设备；SYNC_MODE_PULL 表示数据从远程设备拉至本地设备。<br/>-&nbsp;predicates：约束同步数据和设备。<br/>-&nbsp;callback：指定的callback回调函数，string：设备ID；number：每个设备同步状态，0表示成功，其他值表示失败。 |
| RdbStore | sync(mode: SyncMode, predicates: RdbPredicates): Promise<Array<[string, number]>> | 在设备之间同步数据，结果以Promise形式返回。<br/>-&nbsp;mode：指同步模式。SYNC_MODE_PUSH 表示数据从本地设备推送到远程设备；SYNC_MODE_PULL 表示数据从远程设备拉至本地设备。<br/>-&nbsp;predicates：约束同步数据和设备。 |
**注册数据库的观察者**
......@@ -186,7 +186,7 @@
| 类名 | 接口名 | 描述 |
| -------- | -------- | -------- |
| RdbStore |off(event:'dataChange', type: SubscribeType, observer: Callback<Array<string>>): void;| 从数据库中删除指定类型的指定观察者，结果以callback形式返回。<br/>-&nbsp;type：指在{@code SubscribeType}中定义的订阅类型；SUBSCRIBE_TYPE_REMOTE 订阅远程数据更改。<br/>-&nbsp;observer：指已注册的数据更改观察者。 |
| RdbStore |off(event:'dataChange', type: SubscribeType, observer: Callback<Array\<string>>): void| 从数据库中删除指定类型的指定观察者，结果以callback形式返回。<br/>-&nbsp;type：指在{@code SubscribeType}中定义的订阅类型；SUBSCRIBE_TYPE_REMOTE 订阅远程数据更改。<br/>-&nbsp;observer：指已注册的数据更改观察者。 |
## 开发步骤
......@@ -269,7 +269,8 @@
}).catch((err) => {
console.info("setDistributedTables failed.")
})
```
5. 分布式数据同步。
1. 构造用于同步分布式表的谓词对象，指定组网内的远程设备。
2. 调用同步数据的接口 。
......
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