[GitHub] [dolphinscheduler] fengjian1129 commented on a diff in pull request #12059: [Bug-#12057][task-plugin] fix when the sql query result is empty, the email fails to send the attachment, and an exception will be reported

[GitBox <gi...@apache.org>]

fengjian1129 commented on code in PR #12059:
URL: https://github.com/apache/dolphinscheduler/pull/12059#discussion_r975254342


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dolphinscheduler-task-plugin/dolphinscheduler-task-sql/src/main/java/org/apache/dolphinscheduler/plugin/task/sql/SqlTask.java:
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@@ -255,6 +255,15 @@ private String resultProcess(ResultSet resultSet) throws Exception {
                 resultJSONArray.add(mapOfColValues);
                 rowCount++;
             }
+            // result is null,output table metadata
+            if (resultJSONArray.isEmpty()) {

Review Comment:
   If num=0, it is impossible. This "num" represents the number of fields. The query result cannot be without fields



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