From 33f503474b89ec1d05df98abe6925164575d30b9 Mon Sep 17 00:00:00 2001
From: Haojun Liao <hjliao@taosdata.com>
Date: Mon, 19 Apr 2021 11:40:50 +0800
Subject: [PATCH] [td-2859] fix bug found by regress test.

---
 src/client/src/tscSubquery.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/client/src/tscSubquery.c b/src/client/src/tscSubquery.c
index da743e1597..652551e34d 100644
--- a/src/client/src/tscSubquery.c
+++ b/src/client/src/tscSubquery.c
@@ -2229,7 +2229,7 @@ void tscFirstRoundRetrieveCallback(void* param, TAOS_RES* tres, int numOfRows) {
     }
   }
 
-  if (!pRes->completed) {
+  if (!pRes->completed && numOfRows > 0) {
     taos_fetch_rows_a(tres, tscFirstRoundRetrieveCallback, param);
     return;
   }
-- 
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