From 13db0579e087c442f9b1c469bd57bdfa9047d647 Mon Sep 17 00:00:00 2001
From: dapan1121 <89396746@qq.com>
Date: Fri, 5 Feb 2021 13:56:37 +0800
Subject: [PATCH] fix bug

---
 src/query/src/qAggMain.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/query/src/qAggMain.c b/src/query/src/qAggMain.c
index d43b5f45e8..ed66047bbe 100644
--- a/src/query/src/qAggMain.c
+++ b/src/query/src/qAggMain.c
@@ -1569,8 +1569,10 @@ static void stddev_dst_function(SQLFunctionCtx *pCtx) {
     avg = p->avg;
   } else {  // todo opt performance by using iterator since the timestamp lsit is matched with the output result
     SResPair* p = bsearch(&pCtx->startTs, resList->pData, len, sizeof(SResPair), tsCompare);
-    assert(p != NULL);
-
+    if (p == NULL) {
+      return;
+    }
+    
     avg = p->avg;
   }
 
-- 
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