| DEVICE_COLLABORATION | Device KV store.<br> The device KV store manages data by device, which eliminates conflicts. Data can be queried by device.<br>**System capability**: SystemCapability.DistributedDataManager.KVStore.DistributedKVStore|
| SINGLE_VERSION | Single KV store.<br> The single KV store does not differentiate data by device. If the same key is modified by different devices, the data will be overwritten.<br>**System capability**: SystemCapability.DistributedDataManager.KVStore.Core|
| SINGLE_VERSION | Single KV store.<br>The single KV store does not differentiate data by device. If entries with the same key are modified on different devices, the value will be overwritten.<br>**System capability**: SystemCapability.DistributedDataManager.KVStore.Core |
## SecurityLevel
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@@ -138,10 +138,10 @@ Enumerates the KV store security levels.
| S1 | The KV store security level is low. If data leakage occurs, minor impact will be caused on the database. For example, a KV store that contains system data such as wallpapers.|
| S2 | The KV store security level is medium. If data leakage occurs, moderate impact will be caused on the database. For example, a KV store that contains information created by users or call records, such as audio or video clips.|
| S3 | The KV store security level is high. If data leakage occurs, major impact will be caused on the database. For example, a KV store that contains information such as user fitness, health, and location data.|
| S4 | The KV store security level is critical. If data leakage occurs, severe impact will be caused on the database. For example, a KV store that contains information such as authentication credentials and financial data.|
| S1 | Low security level. Disclosure, tampering, corruption, or loss of the data may cause minor impact on an individual or group.<br>Examples: gender and nationality information, and user application records|
| S2 | Medium security level. Disclosure, tampering, corruption, or loss of the data may cause major impact on an individual or group.<br>Examples: mailing addresses and nicknames of individuals|
| S3 | High security level. Disclosure, tampering, corruption, or loss of the data may cause critical impact on an individual or group.<br>Examples: real-time precise positioning information and movement trajectory |
| S4 | Critical security level. Disclosure, tampering, corruption, or loss of the data may cause significant adverse impact on an individual or group.<br>Examples: political opinions, religious and philosophical belief, trade union membership, genetic data, biological information, health and sexual life status, sexual orientation, device authentication, and personal credit card information|
## Options
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@@ -1316,7 +1316,7 @@ try {
console.info(`query is ${query.getSqlLike()}`);
query=null;
}catch(e){
console.error(`duplicated calls should be ok.ode is ${e.code},message is ${e.message}`);
console.error(`duplicated calls should be ok.code is ${e.code},message is ${e.message}`);
}
```
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@@ -4737,7 +4737,7 @@ Unsubscribes from data changes.
| event | string | Yes | Event to unsubscribe from. The value is **dataChange**, which indicates a data change event.|
| listener | Callback<[ChangeNotification](#changenotification)> | No | Callback for data changes. If the callback is not specified, all subscriptions to the data change event will be canceled. |
| listener | Callback<[ChangeNotification](#changenotification)> | No | Callback for the data change event. If the callback is not specified, all subscriptions to the data change event are canceled.|
Obtains a **KVStoreResultSet** object that matches the specified device ID and **Query** object. This API uses a promise to return the result.
Obtains a **KVStoreResultSet** object that matches the specified **Query** object for this device. This API uses an asynchronous callback to return the result.
