diff --git a/src/client/src/tscSql.c b/src/client/src/tscSql.c
index 4a001a2ce4f03130e6961edb6ee54e27058fab64..69bc69cd4adfdb0413c330891a23cbd2c80351cb 100644
--- a/src/client/src/tscSql.c
+++ b/src/client/src/tscSql.c
@@ -286,11 +286,11 @@ void taos_close(TAOS *taos) {
   assert(ref >= 0);
 
   if (ref > 0) {
-    tscDebug("%p %d remain sqlObjs, do not close dnodeConn:%p", pObj, ref, pObj->pDnodeConn);
+    tscDebug("%p %d remain sqlObjs, not free tscObj and dnodeConn:%p", pObj, ref, pObj->pDnodeConn);
     return;
   }
 
-  tscDebug("%p all sqlObj are freed, free tscObj, dnodeConn:%p", pObj, pObj->pDnodeConn);
+  tscDebug("%p all sqlObj are freed, free tscObj and close dnodeConn:%p", pObj, pObj->pDnodeConn);
   tscCloseTscObj(pObj);
 }
 
diff --git a/src/tsdb/src/tsdbRead.c b/src/tsdb/src/tsdbRead.c
index 24a19e83d0833e630b78ec26934c957eb9890990..3a39d5fc49565958b849e1a913b4f1e3b8130ead 100644
--- a/src/tsdb/src/tsdbRead.c
+++ b/src/tsdb/src/tsdbRead.c
@@ -389,9 +389,9 @@ static bool initTableMemIterator(STsdbQueryHandle* pHandle, STableCheckInfo* pCh
     SDataRow row = *(SDataRow *)SL_GET_NODE_DATA(node);
     TSKEY key = dataRowKey(row);  // first timestamp in buffer
     tsdbDebug("%p uid:%" PRId64 ", tid:%d check data in mem from skey:%" PRId64 ", order:%d, ts range in buf:%" PRId64
-              "-%" PRId64 ", lastKey:%" PRId64 ", %p",
+              "-%" PRId64 ", lastKey:%" PRId64 ", numOfRows:%"PRId64", %p",
               pHandle, pCheckInfo->tableId.uid, pCheckInfo->tableId.tid, key, order, pMem->keyFirst, pMem->keyLast,
-              pCheckInfo->lastKey, pHandle->qinfo);
+              pCheckInfo->lastKey, pMem->numOfRows, pHandle->qinfo);
 
     if (ASCENDING_TRAVERSE(order)) {
       assert(pCheckInfo->lastKey <= key);
@@ -411,9 +411,9 @@ static bool initTableMemIterator(STsdbQueryHandle* pHandle, STableCheckInfo* pCh
     SDataRow row = *(SDataRow *)SL_GET_NODE_DATA(node);
     TSKEY key = dataRowKey(row);  // first timestamp in buffer
     tsdbDebug("%p uid:%" PRId64 ", tid:%d check data in imem from skey:%" PRId64 ", order:%d, ts range in buf:%" PRId64
-              "-%" PRId64 ", lastKey:%" PRId64 ", %p",
+              "-%" PRId64 ", lastKey:%" PRId64 ", numOfRows:%"PRId64", %p",
               pHandle, pCheckInfo->tableId.uid, pCheckInfo->tableId.tid, key, order, pIMem->keyFirst, pIMem->keyLast,
-              pCheckInfo->lastKey, pHandle->qinfo);
+              pCheckInfo->lastKey, pIMem->numOfRows, pHandle->qinfo);
 
     if (ASCENDING_TRAVERSE(order)) {
       assert(pCheckInfo->lastKey <= key);
@@ -735,6 +735,7 @@ static int32_t doLoadFileDataBlock(STsdbQueryHandle* pQueryHandle, SCompBlock* p
   return TSDB_CODE_SUCCESS;
 }
 
+static int32_t getEndPosInDataBlock(STsdbQueryHandle* pQueryHandle, SDataBlockInfo* pBlockInfo);
 static int32_t doCopyRowsFromFileBlock(STsdbQueryHandle* pQueryHandle, int32_t capacity, int32_t numOfRows, int32_t start, int32_t end);
 static void moveDataToFront(STsdbQueryHandle* pQueryHandle, int32_t numOfRows, int32_t numOfCols);
 static void doCheckGeneratedBlockRange(STsdbQueryHandle* pQueryHandle);
@@ -791,9 +792,10 @@ static int32_t handleDataMergeIfNeeded(STsdbQueryHandle* pQueryHandle, SCompBloc
      * Here the buffer is not enough, so only part of file block can be loaded into memory buffer
      */
     assert(pQueryHandle->outputCapacity >= binfo.rows);
+    int32_t endPos = getEndPosInDataBlock(pQueryHandle, &binfo);
 
-    if ((cur->pos == 0 && ASCENDING_TRAVERSE(pQueryHandle->order)) ||
-        (cur->pos == (binfo.rows - 1) && (!ASCENDING_TRAVERSE(pQueryHandle->order)))) {
+    if ((cur->pos == 0 && endPos == binfo.rows -1 && ASCENDING_TRAVERSE(pQueryHandle->order)) ||
+        (cur->pos == (binfo.rows - 1) && endPos == 0 && (!ASCENDING_TRAVERSE(pQueryHandle->order)))) {
       pQueryHandle->realNumOfRows = binfo.rows;
 
       cur->rows = binfo.rows;
@@ -809,7 +811,6 @@ static int32_t handleDataMergeIfNeeded(STsdbQueryHandle* pQueryHandle, SCompBloc
         cur->pos = -1;
       }
     } else { // partially copy to dest buffer
-      int32_t endPos = ASCENDING_TRAVERSE(pQueryHandle->order)? (binfo.rows - 1): 0;
       copyAllRemainRowsFromFileBlock(pQueryHandle, pCheckInfo, &binfo, endPos);
       cur->mixBlock = true;
     }
@@ -1204,6 +1205,29 @@ static void copyAllRemainRowsFromFileBlock(STsdbQueryHandle* pQueryHandle, STabl
             cur->win.ekey, cur->rows, pQueryHandle->qinfo);
 }
 
+int32_t getEndPosInDataBlock(STsdbQueryHandle* pQueryHandle, SDataBlockInfo* pBlockInfo) {
+  // NOTE: reverse the order to find the end position in data block
+  int32_t endPos = -1;
+  int32_t order = ASCENDING_TRAVERSE(pQueryHandle->order)? TSDB_ORDER_DESC : TSDB_ORDER_ASC;
+
+  SQueryFilePos* cur = &pQueryHandle->cur;
+  SDataCols* pCols = pQueryHandle->rhelper.pDataCols[0];
+
+  if (ASCENDING_TRAVERSE(pQueryHandle->order) && pQueryHandle->window.ekey >= pBlockInfo->window.ekey) {
+    endPos = pBlockInfo->rows - 1;
+    cur->mixBlock = (cur->pos != 0);
+  } else if (!ASCENDING_TRAVERSE(pQueryHandle->order) && pQueryHandle->window.ekey <= pBlockInfo->window.skey) {
+    endPos = 0;
+    cur->mixBlock = (cur->pos != pBlockInfo->rows - 1);
+  } else {
+    assert(pCols->numOfRows > 0);
+    endPos = doBinarySearchKey(pCols->cols[0].pData, pCols->numOfRows, pQueryHandle->window.ekey, order);
+    cur->mixBlock = true;
+  }
+
+  return endPos;
+}
+
 // only return the qualified data to client in terms of query time window, data rows in the same block but do not
 // be included in the query time window will be discarded
 static void doMergeTwoLevelData(STsdbQueryHandle* pQueryHandle, STableCheckInfo* pCheckInfo, SCompBlock* pBlock) {
@@ -1225,19 +1249,7 @@ static void doMergeTwoLevelData(STsdbQueryHandle* pQueryHandle, STableCheckInfo*
   int32_t numOfCols = (int32_t)(QH_GET_NUM_OF_COLS(pQueryHandle));
 
   STable* pTable = pCheckInfo->pTableObj;
-  int32_t endPos = cur->pos;
-
-  if (ASCENDING_TRAVERSE(pQueryHandle->order) && pQueryHandle->window.ekey > blockInfo.window.ekey) {
-    endPos = blockInfo.rows - 1;
-    cur->mixBlock = (cur->pos != 0);
-  } else if (!ASCENDING_TRAVERSE(pQueryHandle->order) && pQueryHandle->window.ekey < blockInfo.window.skey) {
-    endPos = 0;
-    cur->mixBlock = (cur->pos != blockInfo.rows - 1);
-  } else {
-    assert(pCols->numOfRows > 0);
-    endPos = doBinarySearchKey(pCols->cols[0].pData, pCols->numOfRows, pQueryHandle->window.ekey, order);
-    cur->mixBlock = true;
-  }
+  int32_t endPos = getEndPosInDataBlock(pQueryHandle, &blockInfo);
 
   tsdbDebug("%p uid:%" PRIu64",tid:%d start merge data block, file block range:%"PRIu64"-%"PRIu64" rows:%d, start:%d,"
             "end:%d, %p",
@@ -1339,8 +1351,8 @@ static void doMergeTwoLevelData(STsdbQueryHandle* pQueryHandle, STableCheckInfo*
   }
 
   cur->blockCompleted =
-      (((pos >= endPos || cur->lastKey > pQueryHandle->window.ekey) && ASCENDING_TRAVERSE(pQueryHandle->order)) ||
-       ((pos <= endPos || cur->lastKey < pQueryHandle->window.ekey) && !ASCENDING_TRAVERSE(pQueryHandle->order)));
+      (((pos > endPos || cur->lastKey > pQueryHandle->window.ekey) && ASCENDING_TRAVERSE(pQueryHandle->order)) ||
+       ((pos < endPos || cur->lastKey < pQueryHandle->window.ekey) && !ASCENDING_TRAVERSE(pQueryHandle->order)));
 
   if (!ASCENDING_TRAVERSE(pQueryHandle->order)) {
     SWAP(cur->win.skey, cur->win.ekey, TSKEY);
diff --git a/tests/script/general/parser/testSuite.sim b/tests/script/general/parser/testSuite.sim
index f42254981c44bfe17d1fb5f92092bb4a87a79a39..3dd80b8e38c8144fee218ec372e59fe262ac7a15 100644
--- a/tests/script/general/parser/testSuite.sim
+++ b/tests/script/general/parser/testSuite.sim
@@ -105,7 +105,6 @@ run general/parser/timestamp.sim
 sleep 2000
 run general/parser/sliding.sim
 
-
 #sleep 2000
 #run general/parser/repeatStream.sim
 #sleep 2000
diff --git a/tests/script/general/parser/topbot.sim b/tests/script/general/parser/topbot.sim
index 2faee55460c9a1dd6990b264f8d983a69b834991..3e906f3a28fc204866ecd06453f0567de22cbe34 100644
--- a/tests/script/general/parser/topbot.sim
+++ b/tests/script/general/parser/topbot.sim
@@ -5,7 +5,7 @@ system sh/cfg.sh -n dnode1 -c walLevel -v 0
 system sh/cfg.sh -n dnode1 -c maxtablespervnode -v 200
 
 system sh/exec.sh -n dnode1 -s start
-sleep 3000
+sleep 1000
 sql connect
 
 $dbPrefix = tb_db
@@ -25,7 +25,7 @@ $stb = $stbPrefix . $i
 
 sql drop database $db -x step1
 step1:
-sql create database $db cache 16
+sql create database $db cache 16 maxrows 4096 keep 36500
 print ====== create tables
 sql use $db
 sql create table $stb (ts timestamp, c1 int, c2 bigint, c3 float, c4 double, c5 smallint, c6 tinyint, c7 bool, c8 binary(10), c9 nchar(10)) tags(t1 int)
@@ -132,15 +132,15 @@ sleep 5000
 system sh/exec.sh -n dnode1 -s start
 print ================== server restart completed
 sql connect
-sleep 3000
+sleep 1000
 
 sql select count(*) from t1.test where ts>10000 and ts<90000 interval(5000a)
 if $rows != 3 then
  return -1
 endi
 
-print =========>td-1308
-sql create database db;
+print ==============>td-1308
+sql create database db keep 36500;
 sql use db;
 
 sql create table stb (ts timestamp, c1 int, c2 binary(10)) tags(t1 binary(10));
@@ -158,4 +158,45 @@ if $rows != 1 then
   return -1
 endi
 
+print =======================>td-1446
+sql create table t(ts timestamp, k int)
+$ts = 6000
+while $ts < 7000
+  sql insert into t values ( $ts , $ts )
+  $ts = $ts + 1
+endw
+
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+system sh/exec.sh -n dnode1 -s start
+sql connect
+sleep 1000
+sql use db;
+
+$ts = 1000
+while $ts < 5096
+  sql insert into t values ( $ts , $ts )
+  $ts = $ts + 1
+endw
+
+sql select * from t where ts < 6500
+if $rows != 4596 then
+  print expect 4596, actual: $rows
+  return -1
+endi
+
+sql select * from t where ts < 7000
+if $rows != 5096 then
+  return -1
+endi
+
+sql select * from t where ts <= 6000
+if $rows != 4097 then
+  return -1
+endi
+
+sql select * from t where ts <= 6001
+if $rows != 4098 then
+  return -1
+endi
+
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
\ No newline at end of file