diff --git a/cmake/define.inc b/cmake/define.inc
index 28770be2545ed007320e2de6385de0783c3138ba..84df6f54055cff0b6fe7f1820d46958787ca3c46 100755
--- a/cmake/define.inc
+++ b/cmake/define.inc
@@ -100,7 +100,7 @@ IF (TD_LINUX)
   ENDIF ()
   
   SET(DEBUG_FLAGS "-O0 -DDEBUG")
-  SET(RELEASE_FLAGS "-O0")
+  SET(RELEASE_FLAGS "-O0 -Wno-unused-variable -Wunused-but-set-variable")
   
   IF (${COVER} MATCHES "true")
     MESSAGE(STATUS "Test coverage mode, add extra flags")
diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index ceb527196233cc351e474fde12c11cb2800c8b60..4bc793e79f2a35661ead7bfe6bdf4e4efc1b5d92 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -6447,4 +6447,4 @@ bool hasNormalColumnFilter(SQueryInfo* pQueryInfo) {
   }
 
   return false;
-}
\ No newline at end of file
+}
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index cc0b844a8ae9c7ced898b2a785d05f1462813aad..38fb63f18ed6e5342006247264c3566697e02b8b 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -1849,6 +1849,7 @@ static void doSetSqlExprAndResultFieldInfo(SQueryInfo* pQueryInfo, SQueryInfo* p
     }
 
     assert(matched);
+    (void)matched;
   }
 
   tscFieldInfoUpdateOffset(pNewQueryInfo);
diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index e26eeefb6a4b334aa81ac4a070558f8e80e1159b..d3012e76624e641ce1e2051201761e52f0851f00 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -5466,6 +5466,7 @@ static int32_t getColumnIndexInSource(SQueryTableMsg *pQueryMsg, SSqlFuncMsg *pE
     }
   }
   assert(0);
+  return -1;
 }
 
 bool validateExprColumnInfo(SQueryTableMsg *pQueryMsg, SSqlFuncMsg *pExprMsg, SColumnInfo* pTagCols) {
diff --git a/tests/pytest/fulltest.sh b/tests/pytest/fulltest.sh
index f6c68378eaac754bf8fe748f4a65737cadc66e57..bfa546f92e6850cad1c4c070d149961221e41e22 100755
--- a/tests/pytest/fulltest.sh
+++ b/tests/pytest/fulltest.sh
@@ -186,6 +186,7 @@ python3 ./test.py -f functions/function_sum.py
 python3 ./test.py -f functions/function_top.py
 #python3 ./test.py -f functions/function_twa.py
 python3 queryCount.py
+python3 ./test.py -f query/queryGroupbyWithInterval.py
 
 # tools
 python3 test.py -f tools/taosdemo.py
diff --git a/tests/pytest/query/queryGroupbyWithInterval.py b/tests/pytest/query/queryGroupbyWithInterval.py
new file mode 100644
index 0000000000000000000000000000000000000000..14f6999021f23764bef95afdaa33cbcb695f2f55
--- /dev/null
+++ b/tests/pytest/query/queryGroupbyWithInterval.py
@@ -0,0 +1,53 @@
+###################################################################
+#           Copyright (c) 2016 by TAOS Technologies, Inc.
+#                     All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+import taos
+from util.log import tdLog
+from util.cases import tdCases
+from util.sql import tdSql
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        tdSql.prepare()
+        
+        tdSql.execute(
+            "create table stest(ts timestamp,size INT,filenum INT) tags (appname binary(500),tenant binary(500))")
+        tdSql.execute(
+            "insert into test1 using stest tags('test1','aaa') values ('2020-09-04 16:53:54.003',210,3)")
+        tdSql.execute(
+            "insert into test2 using stest tags('test1','aaa') values ('2020-09-04 16:53:56.003',210,3)")
+        tdSql.execute(
+            "insert into test11 using stest tags('test11','bbb') values ('2020-09-04 16:53:57.003',210,3)")
+        tdSql.execute(
+            "insert into test12 using stest tags('test11','bbb') values ('2020-09-04 16:53:58.003',210,3)")
+        tdSql.execute(
+            "insert into test21 using stest tags('test21','ccc') values ('2020-09-04 16:53:59.003',210,3)")
+        tdSql.execute(
+            "insert into test22 using stest tags('test21','ccc') values ('2020-09-04 16:54:54.003',210,3)")
+
+        tdSql.query("select sum(size) from stest interval(1d) group by appname")        
+        tdSql.checkRows(3)
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())