HarmonyOS 键值型数据库该怎么使用query去查询？文档中的‘fieId’字段该怎么填？

let child1 = new distributedKVStore.FieldNode('id'); 
child1.type = distributedKVStore.ValueType.INTEGER; 
child1.nullable = false; 
let child2 = new distributedKVStore.FieldNode('name'); 
child2.type = distributedKVStore.ValueType.STRING; 
child2.nullable = false; 
let child3 = new distributedKVStore.FieldNode('age'); 
child3.type = distributedKVStore.ValueType.INTEGER; 
child3.nullable = false; 
let schema = new distributedKVStore.Schema(); 
schema.root.appendChild(child1); 
schema.root.appendChild(child2); 
schema.root.appendChild(child3); 
schema.indexes = ['$.id', '$.name']; 
schema.mode = 1 
schema.skip = 0 
 
let options: distributedKVStore.Options = { 
  createIfMissing: true, 
  encrypt: false, 
  backup: true, 
  autoSync: true, 
  kvStoreType: distributedKVStore.KVStoreType.SINGLE_VERSION, 
  securityLevel: distributedKVStore.SecurityLevel.S1, 
  schema: schema 
};
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const kvManagerConfig: distributedKVStore.KVManagerConfig = { 
  context: this.context, 
  bundleName: 'com.demo.HarmonyOSDemo', 
}; 
this.kvManager = distributedKVStore.createKVManager(kvManagerConfig); 
const kvstore = await this.kvManager.getKVStore('MyStoreId', options)
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let query = new distributedKVStore.Query(); 
query.equalTo('name', 'zhangsan'); 
await this.kvStore.getResultSet(query).then((result: distributedKVStore.KVStoreResultSet) => { 
  console.info(`DistributedKVStoreDemo queryData key:${key}, count: ${JSON.stringify(result.getCount())}`); 
  let entries: distributedKVStore.Entry[] = [] 
  while (result.moveToNext()) { 
    let entry = result.getEntry(); 
    entries.push(entry) 
  } 
}).catch((err: BusinessError) => { 
  console.error(`DistributedKVStoreDemo Query failed,key is ${key}, err is ${JSON.stringify(err)}`); 
})
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