fix #2334 (#2335)

Co-authored-by: dailidong <dailidong66@gmail.com>

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

@@ -299,7 +299,11 @@ public class SqlTask extends AbstractTask {
                     while (resultSet.next()) {
                         JSONObject mapOfColValues = new JSONObject(true);
                         for (int i = 1; i <= num; i++) {
-                            mapOfColValues.put(md.getColumnName(i), resultSet.getObject(i));
+                            if (StringUtils.isNotEmpty(md.getColumnLabel(i))) {
+                                mapOfColValues.put(md.getColumnLabel(i), resultSet.getObject(i));
+                            } else {
+                                mapOfColValues.put(md.getColumnName(i), resultSet.getObject(i));
+                            }
                         }
                         resultJSONArray.add(mapOfColValues);
                     }