From 6f80172730dad18a2338e047843b1e412ed2b272 Mon Sep 17 00:00:00 2001
From: Zesong Sun <szs19@mails.tsinghua.edu.cn>
Date: Sun, 1 Mar 2020 10:49:56 +0800
Subject: [PATCH] Revert "[IOTDB-520] Result of IBatchReader should not cross
 partition" (#860)

* Revert "[IOTDB-520] Result of IBatchReader should not cross partition (#845)"
---
 .../5-DataQuery/2-SeriesReader.md             |  2 +-
 .../reader/universal/PriorityMergeReader.java | 26 +++----------------
 .../db/integration/IoTDBSeriesReaderIT.java   |  2 +-
 3 files changed, 6 insertions(+), 24 deletions(-)

diff --git a/docs/Documentation-CHN/SystemDesign/5-DataQuery/2-SeriesReader.md b/docs/Documentation-CHN/SystemDesign/5-DataQuery/2-SeriesReader.md
index 54b0f3810f2a..12b221b2ee9a 100644
--- a/docs/Documentation-CHN/SystemDesign/5-DataQuery/2-SeriesReader.md
+++ b/docs/Documentation-CHN/SystemDesign/5-DataQuery/2-SeriesReader.md
@@ -411,4 +411,4 @@ return false;
 
 #### canUseCurrentPageStatistics()
 
-先调用`SeriesReader`的`currentPageStatistics()`方法，获得当前page的统计信息，再调用`SeriesReader`的`isPageOverlapped()`方法判断当前page是否重叠，如果当前page不重叠，且其统计信息满足过滤条件，则返回`true`，否则返回`false`。
\ No newline at end of file
+先调用`SeriesReader`的`currentPageStatistics()`方法，获得当前page的统计信息，再调用`SeriesReader`的`isPageOverlapped()`方法判断当前page是否重叠，如果当前page不重叠，且其统计信息满足过滤条件，则返回`true`，否则返回`false`。
diff --git a/server/src/main/java/org/apache/iotdb/db/query/reader/universal/PriorityMergeReader.java b/server/src/main/java/org/apache/iotdb/db/query/reader/universal/PriorityMergeReader.java
index e67bd771cf3b..6901250392bf 100644
--- a/server/src/main/java/org/apache/iotdb/db/query/reader/universal/PriorityMergeReader.java
+++ b/server/src/main/java/org/apache/iotdb/db/query/reader/universal/PriorityMergeReader.java
@@ -18,13 +18,12 @@
  */
 package org.apache.iotdb.db.query.reader.universal;
 
+import org.apache.iotdb.tsfile.read.reader.IPointReader;
+import org.apache.iotdb.tsfile.read.TimeValuePair;
+
 import java.io.IOException;
 import java.util.List;
 import java.util.PriorityQueue;
-import org.apache.iotdb.db.conf.IoTDBConfig;
-import org.apache.iotdb.db.conf.IoTDBDescriptor;
-import org.apache.iotdb.tsfile.read.TimeValuePair;
-import org.apache.iotdb.tsfile.read.reader.IPointReader;
 
 /**
  * This class implements {@link IPointReader} for data sources with different priorities.
@@ -34,8 +33,6 @@ public class PriorityMergeReader implements IPointReader {
   // largest end time of all added readers
   private long currentLargestEndTime;
 
-  private static final IoTDBConfig config = IoTDBDescriptor.getInstance().getConfig();
-
   PriorityQueue<Element> heap = new PriorityQueue<>((o1, o2) -> {
     int timeCompare = Long.compare(o1.timeValuePair.getTimestamp(),
         o2.timeValuePair.getTimestamp());
@@ -61,24 +58,9 @@ public void addReader(IPointReader reader, long priority) throws IOException {
   }
 
   public void addReader(IPointReader reader, long priority, long endTime) throws IOException {
-    long partitionInterval = config.getPartitionInterval();
-    switch (config.getTimestampPrecision()) {
-      case "ns":
-        partitionInterval *= 1000_000_000L;
-        break;
-      case "us":
-        partitionInterval *= 1000_000L;
-        break;
-      default:
-        partitionInterval *= 1000;
-        break;
-    }
     if (reader.hasNextTimeValuePair()) {
       heap.add(new Element(reader, reader.nextTimeValuePair(), priority));
-      long partition = reader.currentTimeValuePair().getTimestamp() / partitionInterval;
-      // set end time before current partition ends
-      currentLargestEndTime = Math.min((partition + 1) * partitionInterval - 1,
-          Math.max(currentLargestEndTime, endTime));
+      currentLargestEndTime = Math.max(currentLargestEndTime, endTime);
     } else {
       reader.close();
     }
diff --git a/server/src/test/java/org/apache/iotdb/db/integration/IoTDBSeriesReaderIT.java b/server/src/test/java/org/apache/iotdb/db/integration/IoTDBSeriesReaderIT.java
index a90de85eb67f..9d16ee0b04bb 100644
--- a/server/src/test/java/org/apache/iotdb/db/integration/IoTDBSeriesReaderIT.java
+++ b/server/src/test/java/org/apache/iotdb/db/integration/IoTDBSeriesReaderIT.java
@@ -79,7 +79,7 @@ public static void setUp() throws Exception {
     tsFileConfig.setPageSizeInByte(1024 * 1024 * 150);
     tsFileConfig.setGroupSizeInByte(1024 * 1024 * 150);
     IoTDBDescriptor.getInstance().getConfig().setMemtableSizeThreshold(1024 * 16);
-
+    
     // test result of IBatchReader should not cross partition
     IoTDBDescriptor.getInstance().getConfig().setPartitionInterval(2);