diff --git a/cmake/env.inc b/cmake/env.inc
index 356bd61442c51a9b697e375e9fe7ee7c1ad3d24b..fa15ec6aee01a619139417fceb21b3a71bd96364 100755
--- a/cmake/env.inc
+++ b/cmake/env.inc
@@ -39,7 +39,7 @@ SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${COMMON_C_FLAGS} ${DEBUG_FLAGS}
 SET(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} ${COMMON_C_FLAGS} ${RELEASE_FLAGS}")
 
 # Set c++ compiler options
-SET(COMMON_CXX_FLAGS "${COMMON_FLAGS} -std=c++11")
+SET(COMMON_CXX_FLAGS "${COMMON_FLAGS} -std=c++11 -Wno-unused-function")
 SET(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${COMMON_CXX_FLAGS} ${DEBUG_FLAGS}")
 SET(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} ${COMMON_CXX_FLAGS} ${RELEASE_FLAGS}")
 
diff --git a/src/client/src/tscSub.c b/src/client/src/tscSub.c
index ef46b4068ecb0641aa1730d48f1e4ad4d95b8222..52ba424fa5adcd43ac5b624b7f486c06df71f2c4 100644
--- a/src/client/src/tscSub.c
+++ b/src/client/src/tscSub.c
@@ -512,6 +512,7 @@ TAOS_RES *taos_consume(TAOS_SUB *tsub) {
 
     pSub->pSql = pSql;
     pSql->pSubscription = pSub;
+    pSub->lastSyncTime = 0;
 
     // no table list now, force to update it
     tscDebug("begin table synchronization");
diff --git a/src/client/tests/timeParseTest.cpp b/src/client/tests/timeParseTest.cpp
index 692398e3b7329b31ac02d4c36635000d4721d8fc..3cc6d541e002a9167b5e2668d4914ad1aa6f94f0 100644
--- a/src/client/tests/timeParseTest.cpp
+++ b/src/client/tests/timeParseTest.cpp
@@ -98,7 +98,7 @@ TEST(testCase, parse_time) {
   taosParseTime(t41, &time, strlen(t41), TSDB_TIME_PRECISION_MILLI, 0);
   EXPECT_EQ(time, 852048000999);
 
-//  int64_t k = timezone;
+  // int64_t k = timezone;
   char    t42[] = "1997-1-1T0:0:0.999999999Z";
   taosParseTime(t42, &time, strlen(t42), TSDB_TIME_PRECISION_MILLI, 0);
   EXPECT_EQ(time, 852048000999 - timezone * MILLISECOND_PER_SECOND);
diff --git a/src/query/tests/astTest.cpp b/src/query/tests/astTest.cpp
index ce7b2f94a177576c8046b299bcb2e695fb5ead2d..1143d00e8da9e77cd0f740d98fe77ffd1beac4bc 100644
--- a/src/query/tests/astTest.cpp
+++ b/src/query/tests/astTest.cpp
@@ -10,6 +10,7 @@
 
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wwrite-strings"
+#pragma GCC diagnostic ignored "-Wunused-function"
 
 typedef struct ResultObj {
   int32_t numOfResult;
diff --git a/src/query/tests/histogramTest.cpp b/src/query/tests/histogramTest.cpp
index 3088d6f8078483c39ec3780250e8bfa2d613f218..0266ecffc11348dcd0184030584ed7b721d39aff 100644
--- a/src/query/tests/histogramTest.cpp
+++ b/src/query/tests/histogramTest.cpp
@@ -5,6 +5,10 @@
 
 #include "taos.h"
 #include "qHistogram.h"
+
+#pragma GCC diagnostic ignored "-Wunused-function"
+#pragma GCC diagnostic ignored "-Wunused-variable"
+
 namespace {
 void doHistogramAddTest() {
   SHistogramInfo* pHisto = NULL;
diff --git a/src/query/tests/patternMatchTest.cpp b/src/query/tests/patternMatchTest.cpp
index f3e0d3e119259d0a7cc8a94a6b43f4c71558bf78..091604c65c0e8b7fcf998fdd69f6f82f101f8157 100644
--- a/src/query/tests/patternMatchTest.cpp
+++ b/src/query/tests/patternMatchTest.cpp
@@ -6,6 +6,9 @@
 #include "qAggMain.h"
 #include "tcompare.h"
 
+#pragma GCC diagnostic ignored "-Wunused-function"
+#pragma GCC diagnostic ignored "-Wunused-variable"
+
 TEST(testCase, patternMatchTest) {
   SPatternCompareInfo info = PATTERN_COMPARE_INFO_INITIALIZER;
 
diff --git a/src/query/tests/percentileTest.cpp b/src/query/tests/percentileTest.cpp
index 104bfb3c06a9613bafcd4e0b3f39af4f9d102b04..1b6951201af5908378fb253b38cea01de1210d57 100644
--- a/src/query/tests/percentileTest.cpp
+++ b/src/query/tests/percentileTest.cpp
@@ -7,6 +7,9 @@
 
 #include "qPercentile.h"
 
+#pragma GCC diagnostic ignored "-Wunused-function"
+#pragma GCC diagnostic ignored "-Wunused-variable"
+
 namespace {
 tMemBucket *createBigIntDataBucket(int32_t start, int32_t end) {
   tMemBucket *pBucket = tMemBucketCreate(sizeof(int64_t), TSDB_DATA_TYPE_BIGINT, start, end);
diff --git a/src/query/tests/resultBufferTest.cpp b/src/query/tests/resultBufferTest.cpp
index 491d75ccb9c8104a8e7760aa15918bd212646de6..54ac0bf4e5c78f2fcc7f0e3271eb3409ea072db7 100644
--- a/src/query/tests/resultBufferTest.cpp
+++ b/src/query/tests/resultBufferTest.cpp
@@ -6,6 +6,9 @@
 #include "taos.h"
 #include "tsdb.h"
 
+#pragma GCC diagnostic ignored "-Wunused-function"
+#pragma GCC diagnostic ignored "-Wunused-variable"
+
 namespace {
 // simple test
 void simpleTest() {
diff --git a/src/query/tests/tsBufTest.cpp b/src/query/tests/tsBufTest.cpp
index dd7f03a494ac37229b117c678fc461d455067850..04c5a152520d08329408253af271c4d43c5c0fe3 100644
--- a/src/query/tests/tsBufTest.cpp
+++ b/src/query/tests/tsBufTest.cpp
@@ -9,6 +9,10 @@
 #include "ttoken.h"
 #include "tutil.h"
 
+#pragma GCC diagnostic ignored "-Wunused-function"
+#pragma GCC diagnostic ignored "-Wunused-variable"
+#pragma GCC diagnostic ignored "-Wunused-but-set-variable"
+
 namespace {
 /**
  *
diff --git a/src/query/tests/unitTest.cpp b/src/query/tests/unitTest.cpp
index 33ba8200d3afb9cff00f150ab5bef799f3fa1e86..e5487a061d8c2b79fbd7d321c256443c3ddab97b 100644
--- a/src/query/tests/unitTest.cpp
+++ b/src/query/tests/unitTest.cpp
@@ -6,14 +6,17 @@
 #include "taos.h"
 #include "tsdb.h"
 
+#pragma GCC diagnostic ignored "-Wwrite-strings"
+#pragma GCC diagnostic ignored "-Wunused-function"
+#pragma GCC diagnostic ignored "-Wunused-variable"
+#pragma GCC diagnostic ignored "-Wunused-but-set-variable"
+#pragma GCC diagnostic ignored "-Wsign-compare"
+
 #include "../../client/inc/tscUtil.h"
 #include "tutil.h"
 #include "tvariant.h"
 #include "ttokendef.h"
 
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wwrite-strings"
-
 namespace {
 int32_t testValidateName(char* name) {
   SStrToken token = {0};