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Posted to reviews@iotdb.apache.org by GitBox <gi...@apache.org> on 2019/07/18 14:06:16 UTC

[GitHub] [incubator-iotdb] little-emotion commented on a change in pull request #262: [IOTDB-144]meta data cache for query

little-emotion commented on a change in pull request #262: [IOTDB-144]meta data cache for query
URL: https://github.com/apache/incubator-iotdb/pull/262#discussion_r304935605
 
 

 ##########
 File path: iotdb/src/main/java/org/apache/iotdb/db/engine/StorageEngine.java
 ##########
 @@ -241,6 +242,15 @@ public QueryDataSource query(SingleSeriesExpression seriesExpression, QueryConte
     return storageGroupProcessor.query(deviceId, measurementId, context);
   }
 
+  /**
+   * returns the top k% sensors most frequently used in queries.
+   */
+  public Set calTopKSensor(String deviceId, String sensorId, double k)
 
 Review comment:
   ok

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