fix the clear logic of specified info of one operator when print plan in explain analyze

integration-test/src/test/java/org/apache/iotdb/db/it/query/IoTDBExplainAnalyzePrintIT.java

@@ -0,0 +1,111 @@
+/*
+ * 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.query;
+
+import org.apache.iotdb.db.queryengine.execution.operator.sink.IdentitySinkOperator;
+import org.apache.iotdb.db.queryengine.execution.operator.source.ExchangeOperator;
+import org.apache.iotdb.it.env.EnvFactory;
+import org.apache.iotdb.it.framework.IoTDBTestRunner;
+import org.apache.iotdb.itbase.category.LocalStandaloneIT;
+import org.apache.iotdb.itbase.env.BaseEnv;
+
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+import org.junit.runner.RunWith;
+
+import java.sql.Connection;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+@RunWith(IoTDBTestRunner.class)
+@Category({LocalStandaloneIT.class})
+public class IoTDBExplainAnalyzePrintIT {
+
+  private static final String[] creationSqls =
+      new String[] {
+        "insert into root.test.device_0(s1, s2, s3, s4, s5, s6, s7, s8, s9, s10) values(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)",
+        "insert into root.test.device_1(s11) values(11)",
+      };
+
+  @BeforeClass
+  public static void setUp() throws Exception {
+    EnvFactory.getEnv().initClusterEnvironment();
+    prepareData();
+  }
+
+  @AfterClass
+  public static void tearDown() throws Exception {
+    EnvFactory.getEnv().cleanClusterEnvironment();
+  }
+
+  private static void prepareData() {
+    try (Connection connection = EnvFactory.getEnv().getConnection(BaseEnv.TREE_SQL_DIALECT);
+        Statement statement = connection.createStatement()) {
+      for (String sql : creationSqls) {
+        statement.execute(sql);
+      }
+    } catch (Exception e) {
+      fail(e.getMessage());
+    }
+  }
+
+  @Test
+  public void testIdentitySinkOperatorWhenMergedInAnalyze() throws SQLException {
+    try (Connection connection = EnvFactory.getEnv().getConnection();
+        Statement statement = connection.createStatement();
+        ResultSet resultSet =
+            statement.executeQuery("explain analyze select * from root.test.device_0")) {
+      boolean found = false;
+      while (resultSet.next()) {
+        if (resultSet.getString(1).contains(IdentitySinkOperator.DOWNSTREAM_PLAN_NODE_ID)) {
+          found = true;
+          break;
+        }
+      }
+      assertTrue(
+          "explain analyze output should contain DownStreamPlanNodeId in IdentitySinkOperator",
+          found);
+    }
+  }
+
+  @Test
+  public void testExchangeOperatorWhenMergedInAnalyze() throws SQLException {
+    try (Connection connection = EnvFactory.getEnv().getConnection();
+        Statement statement = connection.createStatement();
+        ResultSet resultSet =
+            statement.executeQuery(
+                "explain analyze select * from root.test.device_0, root.test.device_1")) {
+      boolean found = false;
+      while (resultSet.next()) {
+        if (resultSet.getString(1).contains(ExchangeOperator.SIZE_IN_BYTES)) {
+          found = true;
+          break;
+        }
+      }
+      assertTrue("explain analyze output should contain size_in_bytes", found);
+    }
+  }
+}

integration-test/src/test/java/org/apache/iotdb/db/it/query/IoTDBFilteredRowsIT.java

@@ -101,7 +101,6 @@ private void verifyExplainMetrics(
 
     try (Statement statement = connection.createStatement()) {
       String sql = "explain analyze verbose select * from " + device + " where " + condition;
-      log.info(sql);
       ResultSet resultSet = statement.executeQuery(sql);
 
       StringBuilder stringBuilder = new StringBuilder();

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/fragment/FragmentInstanceExecution.java

@@ -222,7 +222,6 @@ private boolean fillFragmentInstanceStatistics(
         } else {
           String planNodeId = operatorContext.getPlanNodeId().toString();
           operatorStatistics.setCount(1);
-          operatorStatistics.getSpecifiedInfo().clear();
           leadOverloadOperators.put(operatorType, planNodeId);
           operatorStatisticsMap.put(planNodeId, operatorStatistics);
         }

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/statistics/SpecifiedInfoMergerFactory.java

@@ -41,14 +41,27 @@ public interface SpecifiedInfoMerger {
         return first;
       };
 
+  // currently the sink and shuffle operator only have the field of string type,
+  // and the case that two operators contained in one FI do not exist yet
+  private static final SpecifiedInfoMerger SINK_SHUFFLE_MERGER =
+      (first, second) -> {
+        first.replaceAll((k, v) -> v + " " + second.get(k));
+        return first;
+      };
+
+  /** Maintain different merge logic for specified info for different operators. */
   public static SpecifiedInfoMerger getMerger(String operatorType) {
     switch (operatorType) {
       case "TreeSortOperator":
       case "TreeMergeSortOperator":
       case "TableSortOperator":
       case "TableMergeSortOperator":
       case "FilterAndProjectOperator":
+      case "ExchangeOperator":
         return LONG_MERGER;
+      case "IdentitySinkOperator":
+      case "ShuffleHelperOperator":
+        return SINK_SHUFFLE_MERGER;
       default:
         return DEFAULT_MERGER;
     }

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/statistics/StatisticsMergeUtil.java

@@ -70,8 +70,6 @@ public static void mergeAllOperatorStatistics(
       } else {
         TOperatorStatistics operatorStatistics = entry.getValue();
         operatorStatistics.setCount(1);
-        // Can't merge specifiedInfo of String-type, so just clear it
-        operatorStatistics.getSpecifiedInfo().clear();
         // keep the first one in operatorStatisticsMap as the only-one leadOverloadOperator
         leadOverloadOperators.put(
             operatorStatistics.getOperatorType(), operatorStatistics.getPlanNodeId());