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     new 881ed81484b Fix deletion matching during compaction (#18732)
881ed81484b is described below

commit 881ed81484b749bbcffcf0fbe4d0b6cfde77154a
Author: Haonan <[email protected]>
AuthorDate: Mon Sep 28 15:04:06 2026 +0800

    Fix deletion matching during compaction (#18732)
---
 .../it/IoTDBRecreatedTimeseriesCompactionIT.java   | 125 +++++++++++++++++++++
 .../execute/utils/CompactionPathUtils.java         |   2 +-
 .../compaction/utils/CompactionUtilsTest.java      |  43 +++++--
 3 files changed, 161 insertions(+), 9 deletions(-)

diff --git 
a/integration-test/src/test/java/org/apache/iotdb/db/it/IoTDBRecreatedTimeseriesCompactionIT.java
 
b/integration-test/src/test/java/org/apache/iotdb/db/it/IoTDBRecreatedTimeseriesCompactionIT.java
new file mode 100644
index 00000000000..8d3609ee872
--- /dev/null
+++ 
b/integration-test/src/test/java/org/apache/iotdb/db/it/IoTDBRecreatedTimeseriesCompactionIT.java
@@ -0,0 +1,125 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.iotdb.db.it;
+
+import org.apache.iotdb.commons.conf.IoTDBConstant;
+import org.apache.iotdb.it.env.EnvFactory;
+import org.apache.iotdb.it.framework.IoTDBTestRunner;
+import org.apache.iotdb.itbase.category.LocalStandaloneIT;
+
+import org.awaitility.Awaitility;
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+import org.junit.runner.RunWith;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.sql.Connection;
+import java.sql.ResultSet;
+import java.sql.Statement;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.Stream;
+
+import static org.apache.tsfile.common.constant.TsFileConstant.TSFILE_SUFFIX;
+
+@RunWith(IoTDBTestRunner.class)
+@Category({LocalStandaloneIT.class})
+public class IoTDBRecreatedTimeseriesCompactionIT {
+
+  private static final String DATABASE = "root.repro";
+
+  @BeforeClass
+  public static void setUp() throws Exception {
+    EnvFactory.getEnv()
+        .getConfig()
+        .getCommonConfig()
+        .setEnableSeqSpaceCompaction(false)
+        .setEnableUnseqSpaceCompaction(false)
+        .setEnableCrossSpaceCompaction(false)
+        .setInnerCompactionCandidateFileNum(2);
+    
EnvFactory.getEnv().getConfig().getDataNodeConfig().setCompactionScheduleInterval(1000);
+    EnvFactory.getEnv().initClusterEnvironment();
+  }
+
+  @AfterClass
+  public static void tearDown() throws Exception {
+    EnvFactory.getEnv().cleanClusterEnvironment();
+  }
+
+  @Test
+  public void 
testDeletionAfterRecreatingTwoLevelTimeseriesSurvivesCompaction() throws 
Exception {
+    try (Connection connection = EnvFactory.getEnv().getConnection();
+        Statement statement = connection.createStatement()) {
+      statement.execute("CREATE DATABASE " + DATABASE);
+      statement.execute("CREATE TIMESERIES root.repro.s1 WITH DATATYPE=INT64");
+      statement.execute("INSERT INTO root.repro(time, s1) VALUES (1, 1)");
+      statement.execute("FLUSH");
+
+      statement.execute("DELETE TIMESERIES root.repro.s1");
+      statement.execute("CREATE TIMESERIES root.repro.s1 WITH DATATYPE=INT64");
+      statement.execute("INSERT INTO root.repro(time, s1) VALUES (2, 2)");
+      statement.execute("FLUSH");
+
+      assertOnlyRecreatedTimeseriesDataExists(statement);
+      Assert.assertEquals(2, countSequenceTsFiles());
+
+      statement.execute("SET CONFIGURATION 
'enable_seq_space_compaction'='true'");
+
+      Awaitility.await()
+          .pollInterval(200, TimeUnit.MILLISECONDS)
+          .atMost(30, TimeUnit.SECONDS)
+          .until(() -> countSequenceTsFiles() == 1);
+
+      assertOnlyRecreatedTimeseriesDataExists(statement);
+    }
+  }
+
+  private static void assertOnlyRecreatedTimeseriesDataExists(Statement 
statement)
+      throws Exception {
+    try (ResultSet resultSet = statement.executeQuery("SELECT s1 FROM 
root.repro")) {
+      Assert.assertTrue(resultSet.next());
+      Assert.assertEquals(2, resultSet.getLong("Time"));
+      Assert.assertEquals(2, resultSet.getLong("root.repro.s1"));
+      Assert.assertFalse(resultSet.next());
+    }
+  }
+
+  private static long countSequenceTsFiles() throws IOException {
+    Path databaseSequenceDirectory =
+        Paths.get(
+            EnvFactory.getEnv().getDataNodeWrapper(0).getDataPath(),
+            IoTDBConstant.SEQUENCE_FOLDER_NAME,
+            DATABASE);
+    if (!Files.exists(databaseSequenceDirectory)) {
+      return 0;
+    }
+    try (Stream<Path> paths = Files.walk(databaseSequenceDirectory)) {
+      return paths
+          .filter(Files::isRegularFile)
+          .filter(path -> 
path.getFileName().toString().endsWith(TSFILE_SUFFIX))
+          .count();
+    }
+  }
+}
diff --git 
a/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/compaction/execute/utils/CompactionPathUtils.java
 
b/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/compaction/execute/utils/CompactionPathUtils.java
index 0b26202a0ac..898ea1729f0 100644
--- 
a/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/compaction/execute/utils/CompactionPathUtils.java
+++ 
b/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/compaction/execute/utils/CompactionPathUtils.java
@@ -38,7 +38,7 @@ public class CompactionPathUtils {
 
   public static PartialPath getPath(final IDeviceID device) throws 
IllegalPathException {
     if (device.isTableModel()) {
-      final String[] nodes = new String[device.segmentNum() + 1];
+      final String[] nodes = new String[device.segmentNum()];
       nodes[0] = device.getTableName();
       for (int i = 0; i < device.segmentNum() - 1; i++) {
         nodes[i + 1] = device.segment(i + 1) == null ? null : device.segment(i 
+ 1).toString();
diff --git 
a/iotdb-core/datanode/src/test/java/org/apache/iotdb/db/storageengine/dataregion/compaction/utils/CompactionUtilsTest.java
 
b/iotdb-core/datanode/src/test/java/org/apache/iotdb/db/storageengine/dataregion/compaction/utils/CompactionUtilsTest.java
index 97427b16321..2a0890e6277 100644
--- 
a/iotdb-core/datanode/src/test/java/org/apache/iotdb/db/storageengine/dataregion/compaction/utils/CompactionUtilsTest.java
+++ 
b/iotdb-core/datanode/src/test/java/org/apache/iotdb/db/storageengine/dataregion/compaction/utils/CompactionUtilsTest.java
@@ -21,14 +21,16 @@ package 
org.apache.iotdb.db.storageengine.dataregion.compaction.utils;
 
 import org.apache.iotdb.commons.exception.MetadataException;
 import org.apache.iotdb.commons.path.MeasurementPath;
-import org.apache.iotdb.commons.path.PartialPath;
+import org.apache.iotdb.commons.path.PatternTreeMap;
 import org.apache.iotdb.db.exception.StorageEngineException;
 import org.apache.iotdb.db.service.metrics.FileMetrics;
 import 
org.apache.iotdb.db.storageengine.dataregion.compaction.AbstractCompactionTest;
 import 
org.apache.iotdb.db.storageengine.dataregion.compaction.execute.utils.CompactionPathUtils;
 import 
org.apache.iotdb.db.storageengine.dataregion.compaction.execute.utils.CompactionUtils;
+import org.apache.iotdb.db.storageengine.dataregion.modification.ModEntry;
 import 
org.apache.iotdb.db.storageengine.dataregion.modification.ModificationFile;
 import 
org.apache.iotdb.db.storageengine.dataregion.modification.TreeDeletionEntry;
+import org.apache.iotdb.db.utils.datastructure.PatternTreeMapFactory;
 
 import org.apache.tsfile.exception.write.WriteProcessException;
 import org.apache.tsfile.file.metadata.IDeviceID;
@@ -38,6 +40,7 @@ import org.junit.Test;
 
 import java.io.IOException;
 import java.util.ArrayList;
+import java.util.List;
 
 public class CompactionUtilsTest extends AbstractCompactionTest {
   @Override
@@ -52,13 +55,37 @@ public class CompactionUtilsTest extends 
AbstractCompactionTest {
   }
 
   @Test
-  public void testCompactionPathUtils() {
-    try {
-      IDeviceID deviceID = new StringArrayDeviceID(new String[] {"db.table1", 
null, "tag1"});
-      PartialPath path = CompactionPathUtils.getPath(deviceID, "s1");
-    } catch (Exception e) {
-      Assert.fail();
-    }
+  public void testCompactionPathUtilsForTableModelDevice() throws Exception {
+    IDeviceID deviceID = new StringArrayDeviceID(new String[] {"db.table1", 
null, "tag1"});
+
+    Assert.assertArrayEquals(
+        new String[] {"db.table1", null, "tag1"}, 
CompactionPathUtils.getPath(deviceID).getNodes());
+    Assert.assertArrayEquals(
+        new String[] {"db.table1", null, "tag1", "s1"},
+        CompactionPathUtils.getPath(deviceID, "s1").getNodes());
+  }
+
+  @Test
+  public void testCompactionPathUtilsForTwoLevelTreeDevice() throws Exception {
+    MeasurementPath deletionPath = new MeasurementPath("root.repro.s1");
+    IDeviceID deviceID = deletionPath.getIDeviceID();
+
+    Assert.assertArrayEquals(
+        new String[] {"root", "repro"}, 
CompactionPathUtils.getPath(deviceID).getNodes());
+    Assert.assertArrayEquals(
+        deletionPath.getNodes(), CompactionPathUtils.getPath(deviceID, 
"s1").getNodes());
+
+    TreeDeletionEntry deletion =
+        new TreeDeletionEntry(deletionPath, Long.MIN_VALUE, Long.MAX_VALUE);
+    PatternTreeMap<ModEntry, PatternTreeMapFactory.ModsSerializer> 
modifications =
+        PatternTreeMapFactory.getModsPatternTreeMap();
+    modifications.append(deletion.keyOfPatternTree(), deletion);
+
+    List<ModEntry> matchedModifications =
+        CompactionUtils.getMatchedModifications(modifications, deviceID, "s1", 
null);
+    Assert.assertEquals(1, matchedModifications.size());
+    Assert.assertEquals(
+        deletionPath, ((TreeDeletionEntry) 
matchedModifications.get(0)).getPathPattern());
   }
 
   @Test

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