diff --git a/source/client/src/clientSml.c b/source/client/src/clientSml.c
index cf1d5b7828..ea1c903f53 100644
--- a/source/client/src/clientSml.c
+++ b/source/client/src/clientSml.c
@@ -1327,8 +1327,8 @@ static int32_t smlKvTimeArrayCompare(const void *key1, const void *key2) {
 static int32_t smlKvTimeHashCompare(const void *key1, const void *key2) {
   SHashObj *s1 = *(SHashObj **)key1;
   SHashObj *s2 = *(SHashObj **)key2;
-  SSmlKv   *kv1 = (SSmlKv *)taosHashGet(s1, TS, TS_LEN);
-  SSmlKv   *kv2 = (SSmlKv *)taosHashGet(s2, TS, TS_LEN);
+  SSmlKv *kv1 = *(SSmlKv **)taosHashGet(s1, TS, TS_LEN);
+  SSmlKv *kv2 = *(SSmlKv **)taosHashGet(s2, TS, TS_LEN);
   ASSERT(kv1->type == TSDB_DATA_TYPE_TIMESTAMP);
   ASSERT(kv2->type == TSDB_DATA_TYPE_TIMESTAMP);
   if (kv1->i < kv2->i) {
@@ -1340,29 +1340,13 @@ static int32_t smlKvTimeHashCompare(const void *key1, const void *key2) {
   }
 }
 
-static int32_t smlDealCols(SSmlTableInfo *oneTable, bool dataFormat, SArray *cols) {
-  if (dataFormat) {
-    void *p = taosArraySearch(oneTable->cols, &cols, smlKvTimeArrayCompare, TD_GE);
-    if (p == NULL) {
+static int32_t smlDealCols(SSmlTableInfo* oneTable, bool dataFormat, SArray *cols){
+  if(dataFormat){
+    void *p = taosArraySearch(oneTable->cols, &cols, smlKvTimeArrayCompare, TD_GT);
+    if(p == NULL){
       taosArrayPush(oneTable->cols, &cols);
-    } else {  // to make the sort stable for update data
-      SArray *sa = (SArray *)p;
-      SSmlKv *cur = (SSmlKv *)taosArrayGet(sa, 0);
-      SSmlKv *dCur = (SSmlKv *)taosArrayGet(cols, 0);
-      if (cur->i > dCur->i) {
-        taosArrayInsert(oneTable->cols, TARRAY_ELEM_IDX(oneTable->cols, p), &cols);
-      } else {
-        ASSERT(cur->i == dCur->i);
-        int32_t index = TARRAY_ELEM_IDX(oneTable->cols, p) + 1;
-        for (; index < taosArrayGetSize(oneTable->cols); index++) {
-          SArray *tmp = (SArray *)taosArrayGet(oneTable->cols, index);
-          SSmlKv *curTs = (SSmlKv *)taosArrayGet(tmp, 0);
-          if (curTs->i > dCur->i) {
-            break;
-          }
-        }
-        taosArrayInsert(oneTable->cols, index, &cols);
-      }
+    }else{
+      taosArrayInsert(oneTable->cols, TARRAY_ELEM_IDX(oneTable->cols, p), &cols);
     }
     return TSDB_CODE_SUCCESS;
   }
@@ -1377,27 +1361,11 @@ static int32_t smlDealCols(SSmlTableInfo *oneTable, bool dataFormat, SArray *col
     taosHashPut(kvHash, kv->key, kv->keyLen, &kv, POINTER_BYTES);
   }
 
-  void *p = taosArraySearch(oneTable->cols, &kvHash, smlKvTimeHashCompare, TD_GE);
-  if (p == NULL) {
+  void *p = taosArraySearch(oneTable->cols, &kvHash, smlKvTimeHashCompare, TD_GT);
+  if(p == NULL){
     taosArrayPush(oneTable->cols, &kvHash);
-  } else {  // to make the sort stable for update data
-    SHashObj *sa = (SHashObj *)p;
-    SSmlKv   *cur = (SSmlKv *)taosHashGet(sa, TS, TS_LEN);
-    SSmlKv   *dCur = (SSmlKv *)taosArrayGet(cols, 0);
-    if (cur->i > dCur->i) {
-      taosArrayInsert(oneTable->cols, TARRAY_ELEM_IDX(oneTable->cols, p), &cols);
-    } else {
-      ASSERT(cur->i == dCur->i);
-      int32_t index = TARRAY_ELEM_IDX(oneTable->cols, p) + 1;
-      for (; index < taosArrayGetSize(oneTable->cols); index++) {
-        SHashObj *tmp = (SHashObj *)taosArrayGet(oneTable->cols, index);
-        SSmlKv   *curTs = (SSmlKv *)taosHashGet(tmp, TS, TS_LEN);
-        if (curTs->i > dCur->i) {
-          break;
-        }
-      }
-      taosArrayInsert(oneTable->cols, index, &cols);
-    }
+  }else{
+    taosArrayInsert(oneTable->cols, TARRAY_ELEM_IDX(oneTable->cols, p), &kvHash);
   }
   return TSDB_CODE_SUCCESS;
 }
diff --git a/source/client/test/smlTest.cpp b/source/client/test/smlTest.cpp
index 4ad73a6424..fffb03d9a5 100644
--- a/source/client/test/smlTest.cpp
+++ b/source/client/test/smlTest.cpp
@@ -1260,4 +1260,28 @@ TEST(testCase, sml_16368_Test) {
   pRes = taos_schemaless_insert(taos, (char**)sql, sizeof(sql)/sizeof(sql[0]), TSDB_SML_JSON_PROTOCOL, TSDB_SML_TIMESTAMP_MICRO_SECONDS);
   ASSERT_EQ(taos_errno(pRes), 0);
   taos_free_result(pRes);
-}*/
+}
+
+TEST(testCase, sml_dup_time_Test) {
+ TAOS *taos = taos_connect("localhost", "root", "taosdata", NULL, 0);
+ ASSERT_NE(taos, nullptr);
+
+  TAOS_RES* pRes = taos_query(taos, "create database if not exists dup_time schemaless 1");
+  taos_free_result(pRes);
+
+  const char *sql[] = {
+     //"test_ms,t0=t c0=f 1626006833641",
+     "ubzlsr,id=qmtcvgd,t0=t,t1=127i8,t2=32767i16,t3=2147483647i32,t4=9223372036854775807i64,t5=11.12345f32,t6=22.123456789f64,t7=\"binaryTagValue\",t8=L\"ncharTagValue\" c0=false,c1=1i8,c2=32767i16,c3=2147483647i32,c4=9223372036854775807i64,c5=11.12345f32,c6=22.123456789f64,c7=\"xcxvwjvf\",c8=L\"ncharColValue\",c9=7u64 1626006833639000000",
+     "ubzlsr,id=qmtcvgd,t0=t,t1=127i8,t2=32767i16,t3=2147483647i32,t4=9223372036854775807i64,t5=11.12345f32,t6=22.123456789f64,t7=\"binaryTagValue\",t8=L\"ncharTagValue\" c0=T,c1=2i8,c2=32767i16,c3=2147483647i32,c4=9223372036854775807i64,c5=11.12345f32,c6=22.123456789f64,c7=\"fixrzcuq\",c8=L\"ncharColValue\",c9=7u64 1626006833639000000",
+     "ubzlsr,id=qmtcvgd,t0=t,t1=127i8,t2=32767i16,t3=2147483647i32,t4=9223372036854775807i64,t5=11.12345f32,t6=22.123456789f64,t7=\"binaryTagValue\",t8=L\"ncharTagValue\" c0=t,c1=3i8,c2=32767i16,c3=2147483647i32,c4=9223372036854775807i64,c5=11.12345f32,c6=22.123456789f64,c7=\"iupzdqub\",c8=L\"ncharColValue\",c9=7u64 1626006833639000000",
+     "ubzlsr,id=qmtcvgd,t0=t,t1=127i8,t2=32767i16,t3=2147483647i32,t4=9223372036854775807i64,t5=11.12345f32,t6=22.123456789f64,t7=\"binaryTagValue\",t8=L\"ncharTagValue\" c0=t,c1=4i8,c2=32767i16,c3=2147483647i32,c4=9223372036854775807i64,c5=11.12345f32,c6=22.123456789f64,c7=\"yvvtzzof\",c8=L\"ncharColValue\",c9=7u64 1626006833639000000",
+     "ubzlsr,id=qmtcvgd,t0=t,t1=127i8,t2=32767i16,t3=2147483647i32,t4=9223372036854775807i64,t5=11.12345f32,t6=22.123456789f64,t7=\"binaryTagValue\",t8=L\"ncharTagValue\" c0=t,c1=5i8,c2=32767i16,c3=2147483647i32,c4=9223372036854775807i64,c5=11.12345f32,c6=22.123456789f64,c7=\"vbxpilkj\",c8=L\"ncharColValue\",c9=7u64 1626006833639000000"
+  };
+  pRes = taos_query(taos, "use dup_time");
+  taos_free_result(pRes);
+
+  pRes = taos_schemaless_insert(taos, (char**)sql, sizeof(sql)/sizeof(sql[0]), TSDB_SML_LINE_PROTOCOL, 0);
+  ASSERT_EQ(taos_errno(pRes), 0);
+  taos_free_result(pRes);
+}
+*/
diff --git a/source/libs/parser/src/parInsertData.c b/source/libs/parser/src/parInsertData.c
index 1960073f29..2b505d4bf7 100644
--- a/source/libs/parser/src/parInsertData.c
+++ b/source/libs/parser/src/parInsertData.c
@@ -283,6 +283,8 @@ void sortRemoveDataBlockDupRowsRaw(STableDataBlocks* dataBuf) {
 
   if (!dataBuf->ordered) {
     char* pBlockData = pBlocks->data;
+
+    // todo. qsort is unstable, if timestamp is same, should get the last one
     qsort(pBlockData, pBlocks->numOfRows, dataBuf->rowSize, rowDataCompar);
 
     int32_t i = 0;
@@ -350,6 +352,8 @@ int sortRemoveDataBlockDupRows(STableDataBlocks* dataBuf, SBlockKeyInfo* pBlkKey
 
   if (!dataBuf->ordered) {
     pBlkKeyTuple = pBlkKeyInfo->pKeyTuple;
+
+    // todo. qsort is unstable, if timestamp is same, should get the last one
     qsort(pBlkKeyTuple, nRows, sizeof(SBlockKeyTuple), rowDataCompar);
 
     pBlkKeyTuple = pBlkKeyInfo->pKeyTuple;
diff --git a/source/util/src/talgo.c b/source/util/src/talgo.c
index 866ac5757b..5353cd9bfe 100644
--- a/source/util/src/talgo.c
+++ b/source/util/src/talgo.c
@@ -175,7 +175,13 @@ void *taosbsearch(const void *key, const void *base, int32_t nmemb, int32_t size
 
     c = compar(key, p);
     if (c == 0) {
-      break;
+      if (flags == TD_GT){
+        lidx = midx + 1;
+      } else if(flags == TD_LT){
+        ridx = midx - 1;
+      }else{
+        break;
+      }
     } else if (c < 0) {
       ridx = midx - 1;
     } else {
@@ -189,6 +195,10 @@ void *taosbsearch(const void *key, const void *base, int32_t nmemb, int32_t size
     return (c <= 0) ? p : (midx + 1 < nmemb ? p + size : NULL);
   } else if (flags == TD_LE) {
     return (c >= 0) ? p : (midx > 0 ? p - size : NULL);
+  } else if (flags == TD_GT) {
+    return (c < 0) ? p : (midx + 1 < nmemb ? p + size : NULL);
+  } else if (flags == TD_LT) {
+    return (c > 0) ? p : (midx > 0 ? p - size : NULL);
   } else {
     ASSERT(0);
   }
diff --git a/source/util/test/taosbsearchTest.cpp b/source/util/test/taosbsearchTest.cpp
index 0b250c9ecc..b8fa3a4476 100644
--- a/source/util/test/taosbsearchTest.cpp
+++ b/source/util/test/taosbsearchTest.cpp
@@ -248,6 +248,170 @@ TEST(testCase, taosbsearch_greater_or_equal) {
     ASSERT_EQ(pRet, nullptr);
 }
 
+TEST(testCase, taosbsearch_greater) {
+  // For equal test
+  int   key = 3;
+  void *pRet = NULL;
+
+  pRet = taosbsearch((void *)&key, NULL, 0, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(pRet, nullptr);
+
+  // 1 element
+  int array1[1] = {5};
+
+  key = 1;
+  pRet = taosbsearch((void *)&key, (void *)array1, 1, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 5);
+
+  key = 6;
+  pRet = taosbsearch((void *)&key, (void *)array1, 1, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(pRet, nullptr);
+
+  key = 5;
+  pRet = taosbsearch((void *)&key, (void *)array1, 1, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(pRet, nullptr);
+
+  // 2 element
+  int array2[2] = {3, 6};
+
+  key = 1;
+  pRet = taosbsearch((void *)&key, (void *)array2, 2, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 3);
+
+  key = 3;
+  pRet = taosbsearch((void *)&key, (void *)array2, 2, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 6);
+
+  key = 4;
+  pRet = taosbsearch((void *)&key, (void *)array2, 2, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 6);
+
+  key = 6;
+  pRet = taosbsearch((void *)&key, (void *)array2, 2, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(pRet, nullptr);
+
+  key = 7;
+  pRet = taosbsearch((void *)&key, (void *)array2, 2, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(pRet, nullptr);
+
+  // 3 element
+  int array3[3] = {3, 6, 8};
+
+  key = 1;
+  pRet = taosbsearch((void *)&key, (void *)array3, 3, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 3);
+
+  key = 3;
+  pRet = taosbsearch((void *)&key, (void *)array3, 3, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 6);
+
+  key = 4;
+  pRet = taosbsearch((void *)&key, (void *)array3, 3, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 6);
+
+  key = 6;
+  pRet = taosbsearch((void *)&key, (void *)array3, 3, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 8);
+
+  key = 7;
+  pRet = taosbsearch((void *)&key, (void *)array3, 3, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 8);
+
+  key = 8;
+  pRet = taosbsearch((void *)&key, (void *)array3, 3, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(pRet, nullptr);
+
+  key = 9;
+  pRet = taosbsearch((void *)&key, (void *)array3, 3, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(pRet, nullptr);
+
+  // 4 element
+  int array4[4] = {3, 6, 8, 11};
+
+  key = 1;
+  pRet = taosbsearch((void *)&key, (void *)array4, 4, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 3);
+
+  key = 3;
+  pRet = taosbsearch((void *)&key, (void *)array4, 4, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 6);
+
+  key = 4;
+  pRet = taosbsearch((void *)&key, (void *)array4, 4, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 6);
+
+  key = 6;
+  pRet = taosbsearch((void *)&key, (void *)array4, 4, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 8);
+
+  key = 7;
+  pRet = taosbsearch((void *)&key, (void *)array4, 4, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 8);
+
+  key = 8;
+  pRet = taosbsearch((void *)&key, (void *)array4, 4, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 11);
+
+  key = 9;
+  pRet = taosbsearch((void *)&key, (void *)array4, 4, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 11);
+
+  key = 11;
+  pRet = taosbsearch((void *)&key, (void *)array4, 4, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(pRet, nullptr);
+
+  key = 13;
+  pRet = taosbsearch((void *)&key, (void *)array4, 4, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(pRet, nullptr);
+
+  // 5 element
+  int array5[5] = {3, 6, 8, 11, 15};
+
+  key = 1;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 3);
+
+  key = 3;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 6);
+
+  key = 4;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 6);
+
+  key = 6;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 8);
+
+  key = 7;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 8);
+
+  key = 8;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 11);
+
+  key = 9;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 11);
+
+  key = 11;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 15);
+
+  key = 13;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(*(int *)pRet, 15);
+
+  key = 15;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(pRet, nullptr);
+
+  key = 17;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_GT);
+  ASSERT_EQ(pRet, nullptr);
+}
+
 TEST(testCase, taosbsearch_less_or_equal) {
     // For equal test
     int   key = 3;
@@ -411,4 +575,168 @@ TEST(testCase, taosbsearch_less_or_equal) {
     key = 17;
     pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_LE);
     ASSERT_EQ(*(int *)pRet, 15);
+}
+
+TEST(testCase, taosbsearch_less) {
+  // For equal test
+  int   key = 3;
+  void *pRet = NULL;
+
+  pRet = taosbsearch((void *)&key, NULL, 0, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(pRet, nullptr);
+
+  // 1 element
+  int array1[1] = {5};
+
+  key = 1;
+  pRet = taosbsearch((void *)&key, (void *)array1, 1, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(pRet, nullptr);
+
+  key = 6;
+  pRet = taosbsearch((void *)&key, (void *)array1, 1, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 5);
+
+  key = 5;
+  pRet = taosbsearch((void *)&key, (void *)array1, 1, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(pRet, nullptr);
+
+  // 2 element
+  int array2[2] = {3, 6};
+
+  key = 1;
+  pRet = taosbsearch((void *)&key, (void *)array2, 2, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(pRet, nullptr);
+
+  key = 3;
+  pRet = taosbsearch((void *)&key, (void *)array2, 2, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(pRet, nullptr);
+
+  key = 4;
+  pRet = taosbsearch((void *)&key, (void *)array2, 2, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 3);
+
+  key = 6;
+  pRet = taosbsearch((void *)&key, (void *)array2, 2, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 3);
+
+  key = 7;
+  pRet = taosbsearch((void *)&key, (void *)array2, 2, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 6);
+
+  // 3 element
+  int array3[3] = {3, 6, 8};
+
+  key = 1;
+  pRet = taosbsearch((void *)&key, (void *)array3, 3, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(pRet, nullptr);
+
+  key = 3;
+  pRet = taosbsearch((void *)&key, (void *)array3, 3, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(pRet, nullptr);
+
+  key = 4;
+  pRet = taosbsearch((void *)&key, (void *)array3, 3, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 3);
+
+  key = 6;
+  pRet = taosbsearch((void *)&key, (void *)array3, 3, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 3);
+
+  key = 7;
+  pRet = taosbsearch((void *)&key, (void *)array3, 3, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 6);
+
+  key = 8;
+  pRet = taosbsearch((void *)&key, (void *)array3, 3, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 6);
+
+  key = 9;
+  pRet = taosbsearch((void *)&key, (void *)array3, 3, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 8);
+
+  // 4 element
+  int array4[4] = {3, 6, 8, 11};
+
+  key = 1;
+  pRet = taosbsearch((void *)&key, (void *)array4, 4, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(pRet, nullptr);
+
+  key = 3;
+  pRet = taosbsearch((void *)&key, (void *)array4, 4, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(pRet, nullptr);
+
+  key = 4;
+  pRet = taosbsearch((void *)&key, (void *)array4, 4, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 3);
+
+  key = 6;
+  pRet = taosbsearch((void *)&key, (void *)array4, 4, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 3);
+
+  key = 7;
+  pRet = taosbsearch((void *)&key, (void *)array4, 4, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 6);
+
+  key = 8;
+  pRet = taosbsearch((void *)&key, (void *)array4, 4, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 6);
+
+  key = 9;
+  pRet = taosbsearch((void *)&key, (void *)array4, 4, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 8);
+
+  key = 11;
+  pRet = taosbsearch((void *)&key, (void *)array4, 4, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 8);
+
+  key = 13;
+  pRet = taosbsearch((void *)&key, (void *)array4, 4, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 11);
+
+  // 5 element
+  int array5[5] = {3, 6, 8, 11, 15};
+
+  key = 1;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(pRet, nullptr);
+
+  key = 3;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(pRet, nullptr);
+
+  key = 4;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 3);
+
+  key = 6;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 3);
+
+  key = 7;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 6);
+
+  key = 8;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 6);
+
+  key = 9;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 8);
+
+  key = 11;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 8);
+
+  key = 13;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 11);
+
+  key = 15;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 11);
+
+  key = 17;
+  pRet = taosbsearch((void *)&key, (void *)array5, 5, sizeof(int), compareFunc, TD_LT);
+  ASSERT_EQ(*(int *)pRet, 15);
 }
\ No newline at end of file