[Bug][worker] Fix sql task query result is empty (#5322) (#5324)

* [Bug][worker] Fix sql task query result is empty (#5322)

* add ut

* remove duplicate

* add ut

dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/task/sql/SqlTask.java

@@ -304,6 +304,7 @@ public class SqlTask extends AbstractTask {
      */
     private String resultProcess(ResultSet resultSet) throws Exception {
         ArrayNode resultJSONArray = JSONUtils.createArrayNode();
+        if (resultSet != null) {
             ResultSetMetaData md = resultSet.getMetaData();
             int num = md.getColumnCount();
 
@@ -317,8 +318,6 @@ public class SqlTask extends AbstractTask {
                 resultJSONArray.add(mapOfColValues);
                 rowCount++;
             }
-        String result = JSONUtils.toJsonString(resultJSONArray);
-        logger.debug("execute sql result : {}", result);
 
             int displayRows = sqlParameters.getDisplayRows() > 0 ? sqlParameters.getDisplayRows() : Constants.DEFAULT_DISPLAY_ROWS;
             displayRows = Math.min(displayRows, resultJSONArray.size());
@@ -327,11 +326,15 @@ public class SqlTask extends AbstractTask {
                 String row = JSONUtils.toJsonString(resultJSONArray.get(i));
                 logger.info("row {} : {}", i + 1, row);
             }
+        }
 
+        String result = JSONUtils.toJsonString(resultJSONArray);
         if (sqlParameters.getSendEmail() == null || sqlParameters.getSendEmail()) {
-            sendAttachment(sqlParameters.getGroupId(), StringUtils.isNotEmpty(sqlParameters.getTitle()) ? sqlParameters.getTitle() : taskExecutionContext.getTaskName() + " query result sets",
+            sendAttachment(sqlParameters.getGroupId(), StringUtils.isNotEmpty(sqlParameters.getTitle())
-                    JSONUtils.toJsonString(resultJSONArray));
+                            ? sqlParameters.getTitle()
+                            : taskExecutionContext.getTaskName() + " query result sets", result);
         }
+        logger.debug("execute sql result : {}", result);
         return result;
     }
 

dolphinscheduler-server/src/test/java/org/apache/dolphinscheduler/server/worker/task/sql/SqlTaskTest.java

@@ -20,6 +20,8 @@ package org.apache.dolphinscheduler.server.worker.task.sql;
 import org.apache.dolphinscheduler.common.Constants;
 import org.apache.dolphinscheduler.common.utils.ParameterUtils;
 import org.apache.dolphinscheduler.dao.AlertDao;
+import org.apache.dolphinscheduler.dao.datasource.BaseDataSource;
+import org.apache.dolphinscheduler.remote.command.alert.AlertSendResponseCommand;
 import org.apache.dolphinscheduler.server.entity.SQLTaskExecutionContext;
 import org.apache.dolphinscheduler.server.entity.TaskExecutionContext;
 import org.apache.dolphinscheduler.server.worker.task.TaskProps;
@@ -29,6 +31,8 @@ import org.apache.dolphinscheduler.service.bean.SpringApplicationContext;
 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.ResultSetMetaData;
 import java.util.Date;
 
 import org.junit.Assert;
@@ -39,6 +43,7 @@ import org.mockito.Mockito;
 import org.powermock.api.mockito.PowerMockito;
 import org.powermock.core.classloader.annotations.PrepareForTest;
 import org.powermock.modules.junit4.PowerMockRunner;
+import org.powermock.reflect.Whitebox;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -46,7 +51,8 @@ import org.slf4j.LoggerFactory;
  *  sql task test
  */
 @RunWith(PowerMockRunner.class)
-@PrepareForTest(value = {SqlTask.class, DriverManager.class, SpringApplicationContext.class, ParameterUtils.class})
+@PrepareForTest(value = {SqlTask.class, DriverManager.class, SpringApplicationContext.class,
+        ParameterUtils.class, AlertSendResponseCommand.class, BaseDataSource.class})
 public class SqlTaskTest {
 
     private static final Logger logger = LoggerFactory.getLogger(SqlTaskTest.class);
@@ -114,4 +120,33 @@ public class SqlTaskTest {
         sqlTask.handle();
         Assert.assertEquals(Constants.EXIT_CODE_SUCCESS, sqlTask.getExitStatusCode());
     }
+
+    @Test
+    public void testResultProcess() throws Exception {
+        // test input null and will not throw a exception
+        AlertSendResponseCommand mockResponseCommand = PowerMockito.mock(AlertSendResponseCommand.class);
+        PowerMockito.when(mockResponseCommand.getResStatus()).thenReturn(true);
+        PowerMockito.when(alertClientService.sendAlert(0, "null query result sets", "[]")).thenReturn(mockResponseCommand);
+        String result = Whitebox.invokeMethod(sqlTask, "resultProcess", null);
+        Assert.assertNotNull(result);
+    }
+
+    @Test
+    public void testResultProcess02() throws Exception {
+        // test input not null
+        ResultSet resultSet = PowerMockito.mock(ResultSet.class);
+        ResultSetMetaData mockResultMetaData = PowerMockito.mock(ResultSetMetaData.class);
+        PowerMockito.when(resultSet.getMetaData()).thenReturn(mockResultMetaData);
+        PowerMockito.when(mockResultMetaData.getColumnCount()).thenReturn(2);
+        PowerMockito.when(resultSet.next()).thenReturn(true);
+        PowerMockito.when(resultSet.getObject(Mockito.anyInt())).thenReturn(1);
+        PowerMockito.when(mockResultMetaData.getColumnLabel(Mockito.anyInt())).thenReturn("a");
+
+        AlertSendResponseCommand mockResponseCommand = PowerMockito.mock(AlertSendResponseCommand.class);
+        PowerMockito.when(mockResponseCommand.getResStatus()).thenReturn(true);
+        PowerMockito.when(alertClientService.sendAlert(Mockito.anyInt(), Mockito.anyString(), Mockito.anyString())).thenReturn(mockResponseCommand);
+
+        String result = Whitebox.invokeMethod(sqlTask, "resultProcess", resultSet);
+        Assert.assertNotNull(result);
+    }
 }

pom.xml

@@ -963,6 +963,7 @@
                         <include>**/server/worker/task/TaskManagerTest.java</include>
                         <include>**/server/worker/task/AbstractCommandExecutorTest.java</include>
                         <include>**/server/worker/task/ShellTaskReturnTest.java</include>
+                        <include>**/server/worker/task/sql/SqlTaskTest.java</include>
                         <include>**/server/worker/EnvFileTest.java</include>
                         <include>**/server/worker/runner/TaskExecuteThreadTest.java</include>
                         <include>**/server/worker/runner/WorkerManagerThreadTest.java</include>