qiaojialin commented on a change in pull request #818: [IOTDB-482] Vectorized 
TimeGenerator
URL: https://github.com/apache/incubator-iotdb/pull/818#discussion_r380038665
 
 

 ##########
 File path: 
tsfile/src/main/java/org/apache/iotdb/tsfile/read/query/timegenerator/node/Node.java
 ##########
 @@ -19,12 +19,13 @@
 package org.apache.iotdb.tsfile.read.query.timegenerator.node;
 
 import java.io.IOException;
+import org.apache.iotdb.tsfile.read.common.TimeSeries;
 
 public interface Node {
 
   boolean hasNext() throws IOException;
 
-  long next() throws IOException;
+  TimeSeries next() throws IOException;
 
 Review comment:
   ```suggestion
     TimeSeries nextTimeColumn() throws IOException;
   ```

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