diff --git a/src/client/src/tscSubquery.c b/src/client/src/tscSubquery.c
index 39289a55f482df04979ba79f500f9f19d04dac03..04347ed4eed0d19ae602d13f35b38b6e77da14cb 100644
--- a/src/client/src/tscSubquery.c
+++ b/src/client/src/tscSubquery.c
@@ -662,6 +662,7 @@ static int32_t tscLaunchRealSubqueries(SSqlObj* pSql) {
       } else {
         filterVgroupTables(pQueryInfo, pTableMetaInfo->pVgroupTables);
       }
+      pQueryInfo->stableQuery = true;
     }
 
     subquerySetState(pNew, &pSql->subState, i, 0);
@@ -935,6 +936,96 @@ static void setTidTagType(SJoinSupporter* p, uint8_t type) {
   }
 }
 
+static int32_t tidTagsMerge(SArray *arr, int32_t start, int32_t mid, int32_t end, const int32_t tagSize)
+{
+  char     *pTmp, *pRes = NULL;
+  char     *result = NULL;
+  STidTags *pi, *pj, *p;
+
+  int32_t k = 0;
+  int32_t i = start;
+  int32_t j = mid + 1;
+
+  if (end - start > 0) {
+    result = calloc(1, (end - start + 1) * tagSize);
+    if (result == NULL) {
+      tscError("failed to allocate memory for tidTagsMerge");
+      return TSDB_CODE_TSC_OUT_OF_MEMORY;
+    }
+  }
+
+  pRes = result;
+
+  while (i <= mid && j <= end) {
+    pi = taosArrayGet(arr, i);
+    pj = taosArrayGet(arr, j);
+
+    if (pi->vgId <= pj->vgId) {
+      p = taosArrayGet(arr, i++);
+      memcpy(pRes, p, tagSize);
+    } else {
+      p = taosArrayGet(arr, j++);
+      memcpy(pRes, p, tagSize);
+    }
+
+    k++;
+    pRes += tagSize;
+  }
+
+  if (i == mid + 1) {
+    while(j <= end) {
+      p = taosArrayGet(arr, j++);
+      memcpy(pRes, p, tagSize);
+      k++;
+      pRes += tagSize;
+    }
+  }
+
+  if (j == end + 1) {
+    while (i <= mid) {
+      p = taosArrayGet(arr, i++);
+      memcpy(pRes, p, tagSize);
+      k++;
+      pRes += tagSize;
+    }
+  }
+
+  for (i = start, j = 0, pTmp = result; j < k; i++, j++, pTmp += tagSize) {
+    p = (STidTags *) taosArrayGet(arr, i);
+    memcpy(p, pTmp, tagSize);
+  }
+
+  if (result) {
+    tfree(result);
+  }
+
+  return TSDB_CODE_SUCCESS;
+}
+
+static int32_t tidTagsMergeSort(SArray *arr, int32_t start, int32_t end, const int32_t tagSize)
+{
+  int32_t ret;
+  int32_t mid;
+
+  if (start >= end) {
+    return TSDB_CODE_SUCCESS;
+  }
+
+  mid = (start + end) / 2;
+
+  ret = tidTagsMergeSort(arr, start, mid, tagSize);
+  if (ret != TSDB_CODE_SUCCESS) {
+    return ret;
+  }
+
+  ret = tidTagsMergeSort(arr, mid + 1, end, tagSize);
+  if (ret != TSDB_CODE_SUCCESS) {
+    return ret;
+  }
+
+  return tidTagsMerge(arr, start, mid, end, tagSize);
+}
+
 static int32_t getIntersectionOfTableTuple(SQueryInfo* pQueryInfo, SSqlObj* pParentSql, SArray* resList) {
   int16_t joinNum = pParentSql->subState.numOfSub;
   STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
@@ -1124,7 +1215,10 @@ static int32_t getIntersectionOfTableTuple(SQueryInfo* pQueryInfo, SSqlObj* pPar
     // sort according to the tag value
     size_t num = taosArrayGetSize(ctxlist[i].res);
 
-    qsort((ctxlist[i].res)->pData, num, size, tidTagsCompar);
+    int32_t ret = tidTagsMergeSort(ctxlist[i].res, 0, num - 1, size);
+    if (ret != TSDB_CODE_SUCCESS) {
+      return TSDB_CODE_TSC_OUT_OF_MEMORY;
+    }
 
     taosArrayPush(resList, &ctxlist[i].res);
 
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index 7775ad7c84ec3939cc85aea50ca892c6f734d798..0ca7e3f2b7a539bf1869d9ee20c2b6aacf5dcb04 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -394,7 +394,7 @@ bool tscIsPointInterpQuery(SQueryInfo* pQueryInfo) {
 }
 
 bool tscNeedTableSeqScan(SQueryInfo* pQueryInfo) {
-  return pQueryInfo->stableQuery && (tscQueryContainsFunction(pQueryInfo, TSDB_FUNC_TWA) || tscQueryContainsFunction(pQueryInfo, TSDB_FUNC_ELAPSED));
+  return pQueryInfo->stableQuery && (tscQueryContainsFunction(pQueryInfo, TSDB_FUNC_TWA) || tscQueryContainsFunction(pQueryInfo, TSDB_FUNC_ELAPSED) || (pQueryInfo->tsBuf != NULL));
 }
 
 bool tscGetPointInterpQuery(SQueryInfo* pQueryInfo) {
diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index da346a23b66f12eebe8460dc269fb6a603dfb8a7..e9eebfc7dd1039709a99c033ac1843daf83e70b8 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -4832,7 +4832,7 @@ static int32_t setupQueryHandle(void* tsdb, SQueryRuntimeEnv* pRuntimeEnv, int64
   }
 
   STsdbQueryCond cond = createTsdbQueryCond(pQueryAttr, &pQueryAttr->window);
-  if (pQueryAttr->tsCompQuery || pQueryAttr->pointInterpQuery) {
+  if (pQueryAttr->tsCompQuery || pQueryAttr->pointInterpQuery || pQueryAttr->needTableSeqScan) {
     cond.type = BLOCK_LOAD_TABLE_SEQ_ORDER;    
   }
 
diff --git a/src/tsdb/src/tsdbRead.c b/src/tsdb/src/tsdbRead.c
index 952ca1ca9043e4cc2999fd12d24f8df179e07032..4f47d9d7b2de463ed458f11e952585ebbb39df53 100644
--- a/src/tsdb/src/tsdbRead.c
+++ b/src/tsdb/src/tsdbRead.c
@@ -183,7 +183,6 @@ static void    changeQueryHandleForInterpQuery(TsdbQueryHandleT pHandle);
 static void    doMergeTwoLevelData(STsdbQueryHandle* pQueryHandle, STableCheckInfo* pCheckInfo, SBlock* pBlock);
 static int32_t binarySearchForKey(char* pValue, int num, TSKEY key, int order);
 static int32_t tsdbReadRowsFromCache(STableCheckInfo* pCheckInfo, TSKEY maxKey, int maxRowsToRead, STimeWindow* win, STsdbQueryHandle* pQueryHandle);
-static int32_t tsdbCheckInfoCompar(const void* key1, const void* key2);
 static int32_t doGetExternalRow(STsdbQueryHandle* pQueryHandle, int16_t type, SMemRef* pMemRef);
 static void*   doFreeColumnInfoData(SArray* pColumnInfoData);
 static void*   destroyTableCheckInfo(SArray* pTableCheckInfo);
@@ -333,8 +332,6 @@ static SArray* createCheckInfoFromTableGroup(STsdbQueryHandle* pQueryHandle, STa
     }
   }
 
-  taosArraySort(pTableCheckInfo, tsdbCheckInfoCompar);
-
   size_t gsize = taosArrayGetSize(pTableCheckInfo);
 
   for (int32_t i = 0; i < gsize; ++i) {
@@ -3913,17 +3910,6 @@ static int32_t tableGroupComparFn(const void *p1, const void *p2, const void *pa
   return 0;
 }
 
-static int tsdbCheckInfoCompar(const void* key1, const void* key2) {
-  if (((STableCheckInfo*)key1)->tableId.tid < ((STableCheckInfo*)key2)->tableId.tid) {
-    return -1;
-  } else if (((STableCheckInfo*)key1)->tableId.tid > ((STableCheckInfo*)key2)->tableId.tid) {
-    return 1;
-  } else {
-    ASSERT(false);
-    return 0;
-  }
-}
-
 void createTableGroupImpl(SArray* pGroups, SArray* pTableList, size_t numOfTables, TSKEY skey,
                           STableGroupSupporter* pSupp, __ext_compar_fn_t compareFn) {
   STable* pTable = taosArrayGetP(pTableList, 0);
@@ -4662,4 +4648,4 @@ void tsdbAddScanCallback(TsdbQueryHandleT* queryHandle, readover_callback callba
   pQueryHandle->readover_cb = callback;
   pQueryHandle->param       = param;
   return ;
-}
\ No newline at end of file
+}
diff --git a/src/tsdb/src/tsdbReadImpl.c b/src/tsdb/src/tsdbReadImpl.c
index f2678c627fa61aff227ae61749d2ed76ef5e2db8..57b91e5f3d867c79b3739bfe2f88e73239dd2eb6 100644
--- a/src/tsdb/src/tsdbReadImpl.c
+++ b/src/tsdb/src/tsdbReadImpl.c
@@ -172,28 +172,28 @@ int tsdbSetReadTable(SReadH *pReadh, STable *pTable) {
 
   size_t size = taosArrayGetSize(pReadh->aBlkIdx);
   if (size > 0) {
-    while (true) {
-      if (pReadh->cidx >= size) {
-        pReadh->pBlkIdx = NULL;
-        break;
-      }
-
-      SBlockIdx *pBlkIdx = taosArrayGet(pReadh->aBlkIdx, pReadh->cidx);
+    int64_t left = 0, right = size - 1;
+    while (left <= right) {
+      int64_t mid = (left + right) / 2;
+      SBlockIdx *pBlkIdx = taosArrayGet(pReadh->aBlkIdx, (size_t)mid);
       if (pBlkIdx->tid == TABLE_TID(pTable)) {
         if (pBlkIdx->uid == TABLE_UID(pTable)) {
           pReadh->pBlkIdx = pBlkIdx;
         } else {
           pReadh->pBlkIdx = NULL;
         }
-        pReadh->cidx++;
-        break;
-      } else if (pBlkIdx->tid > TABLE_TID(pTable)) {
-        pReadh->pBlkIdx = NULL;
+
         break;
+      } else if (pBlkIdx->tid < TABLE_TID(pTable)) {
+        left = mid + 1;
       } else {
-        pReadh->cidx++;
+        right = mid - 1;
       }
     }
+
+    if (left > right) {
+      pReadh->pBlkIdx = NULL;
+    }
   } else {
     pReadh->pBlkIdx = NULL;
   }
diff --git a/tests/script/general/parser/limit_stb.sim b/tests/script/general/parser/limit_stb.sim
index 2e6c10cd96db8536e12acf57bf9283eb20f59d1b..498632252b269d872e28928300aaeb0ebf6e5911 100644
--- a/tests/script/general/parser/limit_stb.sim
+++ b/tests/script/general/parser/limit_stb.sim
@@ -168,9 +168,9 @@ sql select * from $stb limit 2 offset $offset
 if $rows != 2 then
   return -1
 endi
-if $data00 != @18-09-17 10:30:00.002@ then
-  return -1
-endi
+#if $data00 != @18-09-17 10:30:00.002@ then
+#  return -1
+#endi
 if $data01 != 9 then
   return -1
 endi