always send emails no matter there are results (#3015)

* always send emails no matter there are results

* always send emails no matter there are results

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

@@ -270,16 +270,9 @@ public class SqlTask extends AbstractTask {
         String result = JSONUtils.toJsonString(resultJSONArray);
         logger.debug("execute sql : {}", result);
 
-        // if there is a result set
-        if (!resultJSONArray.isEmpty(null) ) {
-            if (StringUtils.isNotEmpty(sqlParameters.getTitle())) {
-                sendAttachment(sqlParameters.getTitle(),
-                        JSONUtils.toJsonString(resultJSONArray));
-            }else{
-                sendAttachment(taskExecutionContext.getTaskName() + " query resultsets ",
-                        JSONUtils.toJsonString(resultJSONArray));
-            }
-        }
+        sendAttachment(StringUtils.isNotEmpty(sqlParameters.getTitle()) ?
+                        sqlParameters.getTitle(): taskExecutionContext.getTaskName() + " query result sets",
+                JSONUtils.toJsonString(resultJSONArray));
     }
 
     /**