diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index d891d8eb331d3adbe367706f7a5ccc6070314edf..fc4f6948ac49fd79bd848128f0da46a2a7f1f3a1 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -3525,7 +3525,7 @@ void copyToSDataBlock(SQueryRuntimeEnv* pRuntimeEnv, int32_t threshold, SSDataBl
 
 }
 
-static void updateTableQueryInfoForReverseScan(STableQueryInfo *pTableQueryInfo) {
+static void updateTableQueryInfoForReverseScan(STableQueryInfo *pTableQueryInfo, int64_t qId) {
   if (pTableQueryInfo == NULL) {
     return;
   }
@@ -3536,6 +3536,9 @@ static void updateTableQueryInfoForReverseScan(STableQueryInfo *pTableQueryInfo)
   SWITCH_ORDER(pTableQueryInfo->cur.order);
   pTableQueryInfo->cur.vgroupIndex = -1;
 
+  qDebug("0x%"PRIx64" update query window for reverse scan, %"PRId64" - %"PRId64", lastKey:%"PRId64, qId, pTableQueryInfo->win.skey, pTableQueryInfo->win.ekey,
+    pTableQueryInfo->lastKey);
+
   // set the index to be the end slot of result rows array
   SResultRowInfo* pResultRowInfo = &pTableQueryInfo->resInfo;
   if (pResultRowInfo->size > 0) {
@@ -3556,7 +3559,7 @@ static void setupQueryRangeForReverseScan(SQueryRuntimeEnv* pRuntimeEnv) {
     size_t t = taosArrayGetSize(group);
     for (int32_t j = 0; j < t; ++j) {
       STableQueryInfo *pCheckInfo = taosArrayGetP(group, j);
-      updateTableQueryInfoForReverseScan(pCheckInfo);
+      updateTableQueryInfoForReverseScan(pCheckInfo, GET_QID(pRuntimeEnv));
 
       // update the last key in tableKeyInfo list, the tableKeyInfo is used to build the tsdbQueryHandle and decide
       // the start check timestamp of tsdbQueryHandle
@@ -4096,7 +4099,7 @@ void setParamForStableStddevByColData(SQueryRuntimeEnv* pRuntimeEnv, SQLFunction
  *    merged during merge stage. In this case, we need the pTableQueryInfo->lastResRows to decide if there
  *    is a previous result generated or not.
  */
-void setIntervalQueryRange(SQueryRuntimeEnv *pRuntimeEnv, TSKEY key) {
+void setIntervalQueryRange(SQueryRuntimeEnv *pRuntimeEnv, STimeWindow* winx, int32_t tid) {
   SQueryAttr           *pQueryAttr = pRuntimeEnv->pQueryAttr;
   STableQueryInfo  *pTableQueryInfo = pRuntimeEnv->current;
   SResultRowInfo   *pResultRowInfo = &pTableQueryInfo->resInfo;
@@ -4105,9 +4108,14 @@ void setIntervalQueryRange(SQueryRuntimeEnv *pRuntimeEnv, TSKEY key) {
     return;
   }
 
+  TSKEY key = QUERY_IS_ASC_QUERY(pQueryAttr)? winx->skey:winx->ekey;
+  
+  qDebug("0x%"PRIx64" update query window, tid:%d, %"PRId64" - %"PRId64", old:%"PRId64" - %"PRId64, GET_QID(pRuntimeEnv), tid, key, pTableQueryInfo->win.ekey,
+  pTableQueryInfo->win.skey, pTableQueryInfo->win.ekey);
+
   pTableQueryInfo->win.skey = key;
   STimeWindow win = {.skey = key, .ekey = pQueryAttr->window.ekey};
-
+    
   /**
    * In handling the both ascending and descending order super table query, we need to find the first qualified
    * timestamp of this table, and then set the first qualified start timestamp.
@@ -6029,7 +6037,7 @@ static SSDataBlock* doSTableIntervalAgg(void* param, bool* newgroup) {
 
     setTagValue(pOperator, pTableQueryInfo->pTable, pIntervalInfo->pCtx, pOperator->numOfOutput);
     setInputDataBlock(pOperator, pIntervalInfo->pCtx, pBlock, pQueryAttr->order.order);
-    setIntervalQueryRange(pRuntimeEnv, pBlock->info.window.skey);
+    setIntervalQueryRange(pRuntimeEnv, &pBlock->info.window, pBlock->info.tid);
 
     hashIntervalAgg(pOperator, &pTableQueryInfo->resInfo, pBlock, pTableQueryInfo->groupIndex);
   }
@@ -6084,7 +6092,8 @@ static SSDataBlock* doAllSTableIntervalAgg(void* param, bool* newgroup) {
 
     setTagValue(pOperator, pTableQueryInfo->pTable, pIntervalInfo->pCtx, pOperator->numOfOutput);
     setInputDataBlock(pOperator, pIntervalInfo->pCtx, pBlock, pQueryAttr->order.order);
-    setIntervalQueryRange(pRuntimeEnv, pBlock->info.window.skey);
+
+    setIntervalQueryRange(pRuntimeEnv, &pBlock->info.window, pBlock->info.tid);
 
     hashAllIntervalAgg(pOperator, &pTableQueryInfo->resInfo, pBlock, pTableQueryInfo->groupIndex);
   }
@@ -6102,9 +6111,6 @@ static SSDataBlock* doAllSTableIntervalAgg(void* param, bool* newgroup) {
   return pIntervalInfo->pRes;
 }
 
-
-
-
 static void doStateWindowAggImpl(SOperatorInfo* pOperator, SStateWindowOperatorInfo *pInfo, SSDataBlock *pSDataBlock) {
   SQueryRuntimeEnv* pRuntimeEnv = pOperator->pRuntimeEnv;
   STableQueryInfo*  item = pRuntimeEnv->current;
diff --git a/src/tsdb/src/tsdbRead.c b/src/tsdb/src/tsdbRead.c
index 450ab61eed7e5f576fda72745972ed0b6f0c12cb..582de1c28662bab0a2bff8ad1ed33aed4e7a944c 100644
--- a/src/tsdb/src/tsdbRead.c
+++ b/src/tsdb/src/tsdbRead.c
@@ -859,13 +859,25 @@ static TSKEY extractFirstTraverseKey(STableCheckInfo* pCheckInfo, int32_t order,
       pCheckInfo->chosen = CHECKINFO_CHOSEN_BOTH;
     }
     return r1;
-  } else if (r1 < r2 && ASCENDING_TRAVERSE(order)) {
-    pCheckInfo->chosen = CHECKINFO_CHOSEN_MEM;
-    return r1;
-  }
-  else {
-    pCheckInfo->chosen = CHECKINFO_CHOSEN_IMEM;
-    return r2;
+  } else {
+    if (ASCENDING_TRAVERSE(order)) {
+      if (r1 < r2) {
+        pCheckInfo->chosen = CHECKINFO_CHOSEN_MEM;
+        return r1;
+      } else {
+        pCheckInfo->chosen = CHECKINFO_CHOSEN_IMEM;
+        return r2;
+      }
+    } else {
+      if (r1 < r2) {
+        pCheckInfo->chosen = CHECKINFO_CHOSEN_IMEM;
+        return r2;
+      } else {
+        pCheckInfo->chosen = CHECKINFO_CHOSEN_MEM;
+        return r1;
+      }
+    }
+    
   }
 }
 
@@ -1329,11 +1341,11 @@ static int32_t handleDataMergeIfNeeded(STsdbQueryHandle* pQueryHandle, SBlock* p
 
     assert(cur->blockCompleted);
     if (cur->rows == binfo.rows) {
-      tsdbDebug("%p whole file block qualified, brange:%"PRId64"-%"PRId64", rows:%d, lastKey:%"PRId64", %"PRIx64,
-                pQueryHandle, cur->win.skey, cur->win.ekey, cur->rows, cur->lastKey, pQueryHandle->qId);
+      tsdbDebug("%p whole file block qualified, brange:%"PRId64"-%"PRId64", rows:%d, lastKey:%"PRId64", tid:%d, %"PRIx64,
+                pQueryHandle, cur->win.skey, cur->win.ekey, cur->rows, cur->lastKey, binfo.tid, pQueryHandle->qId);
     } else {
-      tsdbDebug("%p create data block from remain file block, brange:%"PRId64"-%"PRId64", rows:%d, total:%d, lastKey:%"PRId64", %"PRIx64,
-                pQueryHandle, cur->win.skey, cur->win.ekey, cur->rows, binfo.rows, cur->lastKey, pQueryHandle->qId);
+      tsdbDebug("%p create data block from remain file block, brange:%"PRId64"-%"PRId64", rows:%d, total:%d, lastKey:%"PRId64", tid:%d, %"PRIx64,
+                pQueryHandle, cur->win.skey, cur->win.ekey, cur->rows, binfo.rows, cur->lastKey, binfo.tid, pQueryHandle->qId);
     }
 
   }