From 5b81cd8093498deb58fddd3613462708ad093e66 Mon Sep 17 00:00:00 2001
From: dapan1121 <89396746@qq.com>
Date: Wed, 10 Mar 2021 14:50:47 +0800
Subject: [PATCH] fix bug

---
 src/client/src/tscSubquery.c            | 7 +++++++
 tests/script/general/parser/groupby.sim | 5 +++++
 2 files changed, 12 insertions(+)

diff --git a/src/client/src/tscSubquery.c b/src/client/src/tscSubquery.c
index 78e9c68290..6dca3f9059 100644
--- a/src/client/src/tscSubquery.c
+++ b/src/client/src/tscSubquery.c
@@ -1880,6 +1880,13 @@ void doAppendData(SInterResult* pInterResult, TAOS_ROW row, int32_t numOfCols, S
       }
     }
 
+    if (p && taosArrayGetSize(p) > 0) {
+      SResPair *l = taosArrayGetLast(p);
+      if (l->key == key && key == INT64_MIN) {
+        continue;
+      }
+    }
+
     //append a new column
     if (p == NULL) {
       SStddevInterResult t = {.colId = id, .pResult = taosArrayInit(10, sizeof(SResPair)),};
diff --git a/tests/script/general/parser/groupby.sim b/tests/script/general/parser/groupby.sim
index a83c975be2..dd7331054c 100644
--- a/tests/script/general/parser/groupby.sim
+++ b/tests/script/general/parser/groupby.sim
@@ -610,6 +610,11 @@ print =================>TD-2665
 sql_error create table txx as select avg(c) as t from st;
 sql_error create table txx1 as select avg(c) as t from t1;
 
+sql select stddev(c),stddev(c) from st group by c;
+if $rows != 4 then
+  return -1
+endi
+
 print =================>TD-2236
 sql select first(ts),last(ts) from t1 group by c;
 if $rows != 4 then
-- 
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