diff --git a/include/libs/nodes/nodes.h b/include/libs/nodes/nodes.h
index 6f239cc892..08190d978e 100644
--- a/include/libs/nodes/nodes.h
+++ b/include/libs/nodes/nodes.h
@@ -228,6 +228,7 @@ typedef enum ENodeType {
   QUERY_NODE_PHYSICAL_PLAN_FILL,
   QUERY_NODE_PHYSICAL_PLAN_MERGE_SESSION,
   QUERY_NODE_PHYSICAL_PLAN_STREAM_SESSION,
+  QUERY_NODE_PHYSICAL_PLAN_STREAM_SEMI_SESSION,
   QUERY_NODE_PHYSICAL_PLAN_STREAM_FINAL_SESSION,
   QUERY_NODE_PHYSICAL_PLAN_MERGE_STATE,
   QUERY_NODE_PHYSICAL_PLAN_STREAM_STATE,
diff --git a/include/libs/nodes/plannodes.h b/include/libs/nodes/plannodes.h
index 749d58b224..a9002b5d19 100644
--- a/include/libs/nodes/plannodes.h
+++ b/include/libs/nodes/plannodes.h
@@ -130,13 +130,17 @@ typedef struct SMergeLogicNode {
 
 typedef enum EWindowType { WINDOW_TYPE_INTERVAL = 1, WINDOW_TYPE_SESSION, WINDOW_TYPE_STATE } EWindowType;
 
-typedef enum EIntervalAlgorithm {
+typedef enum EWindowAlgorithm {
   INTERVAL_ALGO_HASH = 1,
   INTERVAL_ALGO_MERGE,
   INTERVAL_ALGO_STREAM_FINAL,
   INTERVAL_ALGO_STREAM_SEMI,
   INTERVAL_ALGO_STREAM_SINGLE,
-} EIntervalAlgorithm;
+  SESSION_ALGO_STREAM_SEMI,
+  SESSION_ALGO_STREAM_FINAL,
+  SESSION_ALGO_STREAM_SINGLE,
+  SESSION_ALGO_MERGE,
+} EWindowAlgorithm;
 
 typedef struct SWindowLogicNode {
   SLogicNode         node;
@@ -153,7 +157,7 @@ typedef struct SWindowLogicNode {
   int8_t             triggerType;
   int64_t            watermark;
   double             filesFactor;
-  EIntervalAlgorithm intervalAlgo;
+  EWindowAlgorithm   windowAlgo;
 } SWindowLogicNode;
 
 typedef struct SFillLogicNode {
@@ -371,6 +375,8 @@ typedef struct SSessionWinodwPhysiNode {
 } SSessionWinodwPhysiNode;
 
 typedef SSessionWinodwPhysiNode SStreamSessionWinodwPhysiNode;
+typedef SSessionWinodwPhysiNode SStreamSemiSessionWinodwPhysiNode;
+typedef SSessionWinodwPhysiNode SStreamFinalSessionWinodwPhysiNode;
 
 typedef struct SStateWinodwPhysiNode {
   SWinodwPhysiNode window;
diff --git a/source/dnode/mnode/impl/src/mndDnode.c b/source/dnode/mnode/impl/src/mndDnode.c
index d1bed90175..58c3570c36 100644
--- a/source/dnode/mnode/impl/src/mndDnode.c
+++ b/source/dnode/mnode/impl/src/mndDnode.c
@@ -761,11 +761,12 @@ static int32_t mndRetrieveDnodes(SRpcMsg *pReq, SShowObj *pShow, SSDataBlock *pB
     pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
     colDataAppend(pColInfo, numOfRows, (const char *)&pDnode->createdTime, false);
 
-    char b[tListLen(offlineReason) + VARSTR_HEADER_SIZE] = {0};
+    char *b = taosMemoryCalloc(VARSTR_HEADER_SIZE + strlen(offlineReason[pDnode->offlineReason]) + 1, 1);
     STR_TO_VARSTR(b, online ? "" : offlineReason[pDnode->offlineReason]);
 
     pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
     colDataAppend(pColInfo, numOfRows, b, false);
+    taosMemoryFreeClear(b);
 
     numOfRows++;
     sdbRelease(pSdb, pDnode);
diff --git a/source/libs/executor/inc/executorimpl.h b/source/libs/executor/inc/executorimpl.h
index 034e2893df..d9a7dc8718 100644
--- a/source/libs/executor/inc/executorimpl.h
+++ b/source/libs/executor/inc/executorimpl.h
@@ -845,8 +845,10 @@ SOperatorInfo* createTimeSliceOperatorInfo(SOperatorInfo* downstream, SExprInfo*
 
 SOperatorInfo* createMergeJoinOperatorInfo(SOperatorInfo** pDownstream, int32_t numOfDownstream, SExprInfo* pExprInfo, int32_t numOfCols, SSDataBlock* pResBlock, SNode* pOnCondition, SExecTaskInfo* pTaskInfo);
 
-SOperatorInfo* createStreamSessionAggOperatorInfo(SOperatorInfo* downstream, SExprInfo* pExprInfo, int32_t numOfCols,
-    SSDataBlock* pResBlock, int64_t gap, int32_t tsSlotId, STimeWindowAggSupp* pTwAggSupp, SExecTaskInfo* pTaskInfo);
+SOperatorInfo* createStreamSessionAggOperatorInfo(SOperatorInfo* downstream,
+    SPhysiNode* pPhyNode, SExecTaskInfo* pTaskInfo);
+SOperatorInfo* createStreamFinalSessionAggOperatorInfo(SOperatorInfo* downstream,
+    SPhysiNode* pPhyNode, SExecTaskInfo* pTaskInfo, int32_t numOfChild);
 
 SOperatorInfo* createStreamStateAggOperatorInfo(SOperatorInfo* downstream, SPhysiNode* pPhyNode, SExecTaskInfo* pTaskInfo);
 
diff --git a/source/libs/executor/src/executorimpl.c b/source/libs/executor/src/executorimpl.c
index 40b019eb5d..b8516a3056 100644
--- a/source/libs/executor/src/executorimpl.c
+++ b/source/libs/executor/src/executorimpl.c
@@ -4728,18 +4728,13 @@ SOperatorInfo* createOperatorTree(SPhysiNode* pPhyNode, SExecTaskInfo* pTaskInfo
     pOptr =
         createSessionAggOperatorInfo(ops[0], pExprInfo, num, pResBlock, pSessionNode->gap, tsSlotId, &as, pTaskInfo);
   } else if (QUERY_NODE_PHYSICAL_PLAN_STREAM_SESSION == type) {
-    SSessionWinodwPhysiNode* pSessionNode = (SSessionWinodwPhysiNode*)pPhyNode;
-
-    STimeWindowAggSupp as = {.waterMark = pSessionNode->window.watermark,
-                             .calTrigger = pSessionNode->window.triggerType};
-
-    SExprInfo*   pExprInfo = createExprInfo(pSessionNode->window.pFuncs, NULL, &num);
-    SSDataBlock* pResBlock = createResDataBlock(pPhyNode->pOutputDataBlockDesc);
-    int32_t      tsSlotId = ((SColumnNode*)pSessionNode->window.pTspk)->slotId;
-
-    pOptr = createStreamSessionAggOperatorInfo(ops[0], pExprInfo, num, pResBlock, pSessionNode->gap, tsSlotId, &as,
-                                               pTaskInfo);
-
+    pOptr = createStreamSessionAggOperatorInfo(ops[0], pPhyNode, pTaskInfo);
+  } else if (QUERY_NODE_PHYSICAL_PLAN_STREAM_SEMI_SESSION == type) {
+    int32_t children = 0;
+    pOptr = createStreamFinalSessionAggOperatorInfo(ops[0], pPhyNode, pTaskInfo, children);
+  } else if (QUERY_NODE_PHYSICAL_PLAN_STREAM_FINAL_SESSION == type) {
+    int32_t children = 1;
+    pOptr = createStreamFinalSessionAggOperatorInfo(ops[0], pPhyNode, pTaskInfo, children);
   } else if (QUERY_NODE_PHYSICAL_PLAN_PARTITION == type) {
     pOptr = createPartitionOperatorInfo(ops[0], (SPartitionPhysiNode*)pPhyNode, pTaskInfo);
   } else if (QUERY_NODE_PHYSICAL_PLAN_MERGE_STATE == type) {
diff --git a/source/libs/executor/src/timewindowoperator.c b/source/libs/executor/src/timewindowoperator.c
index d7ae823522..d827067f1c 100644
--- a/source/libs/executor/src/timewindowoperator.c
+++ b/source/libs/executor/src/timewindowoperator.c
@@ -2425,12 +2425,15 @@ int32_t initSessionAggSupporter(SStreamAggSupporter* pSup, const char* pKey, Sql
   return initStreamAggSupporter(pSup, pKey, pCtx, numOfOutput, sizeof(SResultWindowInfo));
 }
 
-SOperatorInfo* createStreamSessionAggOperatorInfo(SOperatorInfo* downstream, SExprInfo* pExprInfo, int32_t numOfCols,
-                                                  SSDataBlock* pResBlock, int64_t gap, int32_t tsSlotId,
-                                                  STimeWindowAggSupp* pTwAggSupp, SExecTaskInfo* pTaskInfo) {
-  int32_t                        code = TSDB_CODE_OUT_OF_MEMORY;
+SOperatorInfo* createStreamSessionAggOperatorInfo(SOperatorInfo* downstream, SPhysiNode* pPhyNode, SExecTaskInfo* pTaskInfo) {
+  SSessionWinodwPhysiNode* pSessionNode = (SSessionWinodwPhysiNode*)pPhyNode;
+  int32_t numOfCols = 0;
+  SExprInfo*   pExprInfo = createExprInfo(pSessionNode->window.pFuncs, NULL, &numOfCols);
+  SSDataBlock* pResBlock = createResDataBlock(pPhyNode->pOutputDataBlockDesc);
+  int32_t tsSlotId = ((SColumnNode*)pSessionNode->window.pTspk)->slotId;
+  int32_t code = TSDB_CODE_OUT_OF_MEMORY;
   SStreamSessionAggOperatorInfo* pInfo = taosMemoryCalloc(1, sizeof(SStreamSessionAggOperatorInfo));
-  SOperatorInfo*                 pOperator = taosMemoryCalloc(1, sizeof(SOperatorInfo));
+  SOperatorInfo* pOperator = taosMemoryCalloc(1, sizeof(SOperatorInfo));
   if (pInfo == NULL || pOperator == NULL) {
     goto _error;
   }
@@ -2453,12 +2456,14 @@ SOperatorInfo* createStreamSessionAggOperatorInfo(SOperatorInfo* downstream, SEx
   }
   initDummyFunction(pInfo->pDummyCtx, pInfo->binfo.pCtx, numOfCols);
 
-  pInfo->twAggSup = *pTwAggSupp;
+  pInfo->twAggSup = (STimeWindowAggSupp) {.waterMark = pSessionNode->window.watermark,
+      .calTrigger = pSessionNode->window.triggerType,
+      .maxTs = INT64_MIN};
   initResultRowInfo(&pInfo->binfo.resultRowInfo, 8);
   initExecTimeWindowInfo(&pInfo->twAggSup.timeWindowData, &pTaskInfo->window);
 
   pInfo->primaryTsIndex = tsSlotId;
-  pInfo->gap = gap;
+  pInfo->gap = pSessionNode->gap;
   pInfo->binfo.pRes = pResBlock;
   pInfo->order = TSDB_ORDER_ASC;
   _hash_fn_t hashFn = taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY);
@@ -2960,25 +2965,20 @@ static SSDataBlock* doStreamSessionAgg(SOperatorInfo* pOperator) {
   return pBInfo->pRes->info.rows == 0 ? NULL : pBInfo->pRes;
 }
 
-SOperatorInfo* createStreamFinalSessionAggOperatorInfo(SOperatorInfo* downstream, SExprInfo* pExprInfo,
-                                                       int32_t numOfCols, SSDataBlock* pResBlock, int64_t gap,
-                                                       int32_t tsSlotId, STimeWindowAggSupp* pTwAggSupp,
-                                                       SExecTaskInfo* pTaskInfo) {
-  int32_t                        code = TSDB_CODE_OUT_OF_MEMORY;
-  SStreamSessionAggOperatorInfo* pInfo = NULL;
-  SOperatorInfo* pOperator = createStreamSessionAggOperatorInfo(downstream, pExprInfo, numOfCols, pResBlock, gap,
-                                                                tsSlotId, pTwAggSupp, pTaskInfo);
+SOperatorInfo* createStreamFinalSessionAggOperatorInfo(SOperatorInfo* downstream,
+    SPhysiNode* pPhyNode, SExecTaskInfo* pTaskInfo, int32_t numOfChild) {
+  int32_t        code = TSDB_CODE_OUT_OF_MEMORY;
+  SOperatorInfo* pOperator = createStreamSessionAggOperatorInfo(downstream, pPhyNode, pTaskInfo);
   if (pOperator == NULL) {
     goto _error;
   }
   pOperator->name = "StreamFinalSessionWindowAggOperator";
   pOperator->operatorType = QUERY_NODE_PHYSICAL_PLAN_STREAM_FINAL_SESSION;
-  int32_t numOfChild = 1;  // Todo(liuyao) get it from phy plan
-  pInfo = pOperator->info;
+  SStreamSessionAggOperatorInfo* pInfo = pOperator->info;
   pInfo->pChildren = taosArrayInit(8, sizeof(void*));
   for (int32_t i = 0; i < numOfChild; i++) {
     SOperatorInfo* pChild =
-        createStreamSessionAggOperatorInfo(NULL, pExprInfo, numOfCols, NULL, gap, tsSlotId, pTwAggSupp, pTaskInfo);
+        createStreamSessionAggOperatorInfo(NULL, pPhyNode, pTaskInfo);
     if (pChild == NULL) {
       goto _error;
     }
@@ -2988,7 +2988,7 @@ SOperatorInfo* createStreamFinalSessionAggOperatorInfo(SOperatorInfo* downstream
 
 _error:
   if (pInfo != NULL) {
-    destroyStreamSessionAggOperatorInfo(pInfo, numOfCols);
+    destroyStreamSessionAggOperatorInfo(pInfo, pOperator->numOfExprs);
   }
 
   taosMemoryFreeClear(pInfo);
diff --git a/source/libs/nodes/src/nodesCloneFuncs.c b/source/libs/nodes/src/nodesCloneFuncs.c
index 2e30b01357..d0eb1548c1 100644
--- a/source/libs/nodes/src/nodesCloneFuncs.c
+++ b/source/libs/nodes/src/nodesCloneFuncs.c
@@ -427,7 +427,7 @@ static SNode* logicWindowCopy(const SWindowLogicNode* pSrc, SWindowLogicNode* pD
   COPY_SCALAR_FIELD(triggerType);
   COPY_SCALAR_FIELD(watermark);
   COPY_SCALAR_FIELD(filesFactor);
-  COPY_SCALAR_FIELD(intervalAlgo);
+  COPY_SCALAR_FIELD(windowAlgo);
   return (SNode*)pDst;
 }
 
@@ -538,6 +538,12 @@ static SNode* physiIntervalCopy(const SIntervalPhysiNode* pSrc, SIntervalPhysiNo
   return (SNode*)pDst;
 }
 
+static SNode* physiSessionCopy(const SSessionWinodwPhysiNode* pSrc, SSessionWinodwPhysiNode* pDst) {
+  COPY_BASE_OBJECT_FIELD(window, physiWindowCopy);
+  COPY_SCALAR_FIELD(gap);
+  return (SNode*)pDst;
+}
+
 static SNode* dataBlockDescCopy(const SDataBlockDescNode* pSrc, SDataBlockDescNode* pDst) {
   COPY_SCALAR_FIELD(dataBlockId);
   CLONE_NODE_LIST_FIELD(pSlots);
@@ -678,6 +684,9 @@ SNode* nodesCloneNode(const SNode* pNode) {
     case QUERY_NODE_PHYSICAL_PLAN_STREAM_FINAL_INTERVAL:
     case QUERY_NODE_PHYSICAL_PLAN_STREAM_SEMI_INTERVAL:
       return physiIntervalCopy((const SIntervalPhysiNode*)pNode, (SIntervalPhysiNode*)pDst);
+    case QUERY_NODE_PHYSICAL_PLAN_STREAM_SEMI_SESSION:
+    case QUERY_NODE_PHYSICAL_PLAN_STREAM_FINAL_SESSION:
+      return physiSessionCopy((const SSessionWinodwPhysiNode*)pNode, (SSessionWinodwPhysiNode*)pDst);
     default:
       break;
   }
diff --git a/source/libs/nodes/src/nodesCodeFuncs.c b/source/libs/nodes/src/nodesCodeFuncs.c
index fb6a428d3c..ff433660be 100644
--- a/source/libs/nodes/src/nodesCodeFuncs.c
+++ b/source/libs/nodes/src/nodesCodeFuncs.c
@@ -246,6 +246,10 @@ const char* nodesNodeName(ENodeType type) {
       return "PhysiSessionWindow";
     case QUERY_NODE_PHYSICAL_PLAN_STREAM_SESSION:
       return "PhysiStreamSessionWindow";
+    case QUERY_NODE_PHYSICAL_PLAN_STREAM_SEMI_SESSION:
+      return "PhysiStreamSemiSessionWindow";
+    case QUERY_NODE_PHYSICAL_PLAN_STREAM_FINAL_SESSION:
+      return "PhysiStreamFinalSessionWindow";
     case QUERY_NODE_PHYSICAL_PLAN_MERGE_STATE:
       return "PhysiStateWindow";
     case QUERY_NODE_PHYSICAL_PLAN_STREAM_STATE:
@@ -3998,6 +4002,8 @@ static int32_t specificNodeToJson(const void* pObj, SJson* pJson) {
       return physiFillNodeToJson(pObj, pJson);
     case QUERY_NODE_PHYSICAL_PLAN_MERGE_SESSION:
     case QUERY_NODE_PHYSICAL_PLAN_STREAM_SESSION:
+    case QUERY_NODE_PHYSICAL_PLAN_STREAM_SEMI_SESSION:
+    case QUERY_NODE_PHYSICAL_PLAN_STREAM_FINAL_SESSION:
       return physiSessionWindowNodeToJson(pObj, pJson);
     case QUERY_NODE_PHYSICAL_PLAN_MERGE_STATE:
     case QUERY_NODE_PHYSICAL_PLAN_STREAM_STATE:
@@ -4131,6 +4137,8 @@ static int32_t jsonToSpecificNode(const SJson* pJson, void* pObj) {
       return jsonToPhysiFillNode(pJson, pObj);
     case QUERY_NODE_PHYSICAL_PLAN_MERGE_SESSION:
     case QUERY_NODE_PHYSICAL_PLAN_STREAM_SESSION:
+    case QUERY_NODE_PHYSICAL_PLAN_STREAM_SEMI_SESSION:
+    case QUERY_NODE_PHYSICAL_PLAN_STREAM_FINAL_SESSION:
       return jsonToPhysiSessionWindowNode(pJson, pObj);
     case QUERY_NODE_PHYSICAL_PLAN_MERGE_STATE:
     case QUERY_NODE_PHYSICAL_PLAN_STREAM_STATE:
diff --git a/source/libs/nodes/src/nodesUtilFuncs.c b/source/libs/nodes/src/nodesUtilFuncs.c
index 6d04e7a959..18a5b8664f 100644
--- a/source/libs/nodes/src/nodesUtilFuncs.c
+++ b/source/libs/nodes/src/nodesUtilFuncs.c
@@ -289,6 +289,10 @@ SNode* nodesMakeNode(ENodeType type) {
       return makeNode(type, sizeof(SSessionWinodwPhysiNode));
     case QUERY_NODE_PHYSICAL_PLAN_STREAM_SESSION:
       return makeNode(type, sizeof(SStreamSessionWinodwPhysiNode));
+    case QUERY_NODE_PHYSICAL_PLAN_STREAM_SEMI_SESSION:
+      return makeNode(type, sizeof(SStreamSemiSessionWinodwPhysiNode));
+    case QUERY_NODE_PHYSICAL_PLAN_STREAM_FINAL_SESSION:
+      return makeNode(type, sizeof(SStreamFinalSessionWinodwPhysiNode));
     case QUERY_NODE_PHYSICAL_PLAN_MERGE_STATE:
       return makeNode(type, sizeof(SStateWinodwPhysiNode));
     case QUERY_NODE_PHYSICAL_PLAN_STREAM_STATE:
@@ -806,6 +810,7 @@ void nodesDestroyNode(SNode* pNode) {
     }
     case QUERY_NODE_PHYSICAL_PLAN_MERGE_SESSION:
     case QUERY_NODE_PHYSICAL_PLAN_STREAM_SESSION:
+    case QUERY_NODE_PHYSICAL_PLAN_STREAM_SEMI_SESSION:
     case QUERY_NODE_PHYSICAL_PLAN_STREAM_FINAL_SESSION:
       destroyWinodwPhysiNode((SWinodwPhysiNode*)pNode);
       break;
diff --git a/source/libs/parser/test/mockCatalogService.cpp b/source/libs/parser/test/mockCatalogService.cpp
index 68f9e9d36d..9758da7899 100644
--- a/source/libs/parser/test/mockCatalogService.cpp
+++ b/source/libs/parser/test/mockCatalogService.cpp
@@ -285,7 +285,7 @@ class MockCatalogServiceImpl {
   }
 
   void createSmaIndex(const SMCreateSmaReq* pReq) {
-    STableIndexInfo info;
+    STableIndexInfo info = {0};
     info.intervalUnit = pReq->intervalUnit;
     info.slidingUnit = pReq->slidingUnit;
     info.interval = pReq->interval;
diff --git a/source/libs/planner/src/planLogicCreater.c b/source/libs/planner/src/planLogicCreater.c
index cbc74a2711..3cd5eeb655 100644
--- a/source/libs/planner/src/planLogicCreater.c
+++ b/source/libs/planner/src/planLogicCreater.c
@@ -548,6 +548,7 @@ static int32_t createWindowLogicNodeBySession(SLogicPlanContext* pCxt, SSessionW
 
   pWindow->winType = WINDOW_TYPE_SESSION;
   pWindow->sessionGap = ((SValueNode*)pSession->pGap)->datum.i;
+  pWindow->windowAlgo = pCxt->pPlanCxt->streamQuery ? SESSION_ALGO_STREAM_SINGLE : SESSION_ALGO_MERGE;
 
   pWindow->pTspk = nodesCloneNode((SNode*)pSession->pCol);
   if (NULL == pWindow->pTspk) {
@@ -572,7 +573,7 @@ static int32_t createWindowLogicNodeByInterval(SLogicPlanContext* pCxt, SInterva
   pWindow->sliding = (NULL != pInterval->pSliding ? ((SValueNode*)pInterval->pSliding)->datum.i : pWindow->interval);
   pWindow->slidingUnit =
       (NULL != pInterval->pSliding ? ((SValueNode*)pInterval->pSliding)->unit : pWindow->intervalUnit);
-  pWindow->intervalAlgo = pCxt->pPlanCxt->streamQuery ? INTERVAL_ALGO_STREAM_SINGLE : INTERVAL_ALGO_HASH;
+  pWindow->windowAlgo = pCxt->pPlanCxt->streamQuery ? INTERVAL_ALGO_STREAM_SINGLE : INTERVAL_ALGO_HASH;
 
   pWindow->pTspk = nodesCloneNode(pInterval->pCol);
   if (NULL == pWindow->pTspk) {
diff --git a/source/libs/planner/src/planPhysiCreater.c b/source/libs/planner/src/planPhysiCreater.c
index 2974b3ef8c..99476c4cbd 100644
--- a/source/libs/planner/src/planPhysiCreater.c
+++ b/source/libs/planner/src/planPhysiCreater.c
@@ -977,8 +977,8 @@ static int32_t createWindowPhysiNodeFinalize(SPhysiPlanContext* pCxt, SNodeList*
   return code;
 }
 
-static ENodeType getIntervalOperatorType(EIntervalAlgorithm intervalAlgo) {
-  switch (intervalAlgo) {
+static ENodeType getIntervalOperatorType(EWindowAlgorithm windowAlgo) {
+  switch (windowAlgo) {
     case INTERVAL_ALGO_HASH:
       return QUERY_NODE_PHYSICAL_PLAN_HASH_INTERVAL;
     case INTERVAL_ALGO_MERGE:
@@ -989,6 +989,14 @@ static ENodeType getIntervalOperatorType(EIntervalAlgorithm intervalAlgo) {
       return QUERY_NODE_PHYSICAL_PLAN_STREAM_SEMI_INTERVAL;
     case INTERVAL_ALGO_STREAM_SINGLE:
       return QUERY_NODE_PHYSICAL_PLAN_STREAM_INTERVAL;
+    case SESSION_ALGO_STREAM_FINAL:
+      return QUERY_NODE_PHYSICAL_PLAN_STREAM_FINAL_SESSION;
+    case SESSION_ALGO_STREAM_SEMI:
+      return QUERY_NODE_PHYSICAL_PLAN_STREAM_SEMI_SESSION;
+    case SESSION_ALGO_STREAM_SINGLE:
+      return QUERY_NODE_PHYSICAL_PLAN_STREAM_SESSION;
+    case SESSION_ALGO_MERGE:
+      return QUERY_NODE_PHYSICAL_PLAN_MERGE_SESSION;
     default:
       break;
   }
@@ -998,7 +1006,7 @@ static ENodeType getIntervalOperatorType(EIntervalAlgorithm intervalAlgo) {
 static int32_t createIntervalPhysiNode(SPhysiPlanContext* pCxt, SNodeList* pChildren,
                                        SWindowLogicNode* pWindowLogicNode, SPhysiNode** pPhyNode) {
   SIntervalPhysiNode* pInterval = (SIntervalPhysiNode*)makePhysiNode(
-      pCxt, (SLogicNode*)pWindowLogicNode, getIntervalOperatorType(pWindowLogicNode->intervalAlgo));
+      pCxt, (SLogicNode*)pWindowLogicNode, getIntervalOperatorType(pWindowLogicNode->windowAlgo));
   if (NULL == pInterval) {
     return TSDB_CODE_OUT_OF_MEMORY;
   }
@@ -1015,8 +1023,7 @@ static int32_t createIntervalPhysiNode(SPhysiPlanContext* pCxt, SNodeList* pChil
 static int32_t createSessionWindowPhysiNode(SPhysiPlanContext* pCxt, SNodeList* pChildren,
                                             SWindowLogicNode* pWindowLogicNode, SPhysiNode** pPhyNode) {
   SSessionWinodwPhysiNode* pSession = (SSessionWinodwPhysiNode*)makePhysiNode(
-      pCxt, (SLogicNode*)pWindowLogicNode,
-      (pCxt->pPlanCxt->streamQuery ? QUERY_NODE_PHYSICAL_PLAN_STREAM_SESSION : QUERY_NODE_PHYSICAL_PLAN_MERGE_SESSION));
+      pCxt, (SLogicNode*)pWindowLogicNode, getIntervalOperatorType(pWindowLogicNode->windowAlgo));
   if (NULL == pSession) {
     return TSDB_CODE_OUT_OF_MEMORY;
   }
diff --git a/source/libs/planner/src/planSpliter.c b/source/libs/planner/src/planSpliter.c
index 3a9e1d7405..fe02dd6425 100644
--- a/source/libs/planner/src/planSpliter.c
+++ b/source/libs/planner/src/planSpliter.c
@@ -376,8 +376,8 @@ static int32_t stbSplSplitIntervalForBatch(SSplitContext* pCxt, SStableSplitInfo
   SLogicNode* pPartWindow = NULL;
   int32_t     code = stbSplCreatePartWindowNode((SWindowLogicNode*)pInfo->pSplitNode, &pPartWindow);
   if (TSDB_CODE_SUCCESS == code) {
-    ((SWindowLogicNode*)pPartWindow)->intervalAlgo = INTERVAL_ALGO_HASH;
-    ((SWindowLogicNode*)pInfo->pSplitNode)->intervalAlgo = INTERVAL_ALGO_MERGE;
+    ((SWindowLogicNode*)pPartWindow)->windowAlgo = INTERVAL_ALGO_HASH;
+    ((SWindowLogicNode*)pInfo->pSplitNode)->windowAlgo = INTERVAL_ALGO_MERGE;
     SNodeList* pMergeKeys = NULL;
     code = stbSplCreateMergeKeysByPrimaryKey(((SWindowLogicNode*)pInfo->pSplitNode)->pTspk, &pMergeKeys);
     if (TSDB_CODE_SUCCESS == code) {
@@ -400,8 +400,8 @@ static int32_t stbSplSplitIntervalForStream(SSplitContext* pCxt, SStableSplitInf
   SLogicNode* pPartWindow = NULL;
   int32_t     code = stbSplCreatePartWindowNode((SWindowLogicNode*)pInfo->pSplitNode, &pPartWindow);
   if (TSDB_CODE_SUCCESS == code) {
-    ((SWindowLogicNode*)pPartWindow)->intervalAlgo = INTERVAL_ALGO_STREAM_SEMI;
-    ((SWindowLogicNode*)pInfo->pSplitNode)->intervalAlgo = INTERVAL_ALGO_STREAM_FINAL;
+    ((SWindowLogicNode*)pPartWindow)->windowAlgo = INTERVAL_ALGO_STREAM_SEMI;
+    ((SWindowLogicNode*)pInfo->pSplitNode)->windowAlgo = INTERVAL_ALGO_STREAM_FINAL;
     code = stbSplCreateExchangeNode(pCxt, pInfo->pSplitNode, pPartWindow);
   }
   if (TSDB_CODE_SUCCESS == code) {
@@ -421,8 +421,29 @@ static int32_t stbSplSplitInterval(SSplitContext* pCxt, SStableSplitInfo* pInfo)
   }
 }
 
+static int32_t stbSplSplitSessionForStream(SSplitContext* pCxt, SStableSplitInfo* pInfo) {
+  SLogicNode* pPartWindow = NULL;
+  int32_t     code = stbSplCreatePartWindowNode((SWindowLogicNode*)pInfo->pSplitNode, &pPartWindow);
+  if (TSDB_CODE_SUCCESS == code) {
+    ((SWindowLogicNode*)pPartWindow)->windowAlgo = SESSION_ALGO_STREAM_SEMI;
+    ((SWindowLogicNode*)pInfo->pSplitNode)->windowAlgo = SESSION_ALGO_STREAM_FINAL;
+    code = stbSplCreateExchangeNode(pCxt, pInfo->pSplitNode, pPartWindow);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = nodesListMakeStrictAppend(&pInfo->pSubplan->pChildren,
+                                     (SNode*)splCreateScanSubplan(pCxt, pPartWindow, SPLIT_FLAG_STABLE_SPLIT));
+  }
+  pInfo->pSubplan->subplanType = SUBPLAN_TYPE_MERGE;
+  ++(pCxt->groupId);
+  return code;
+}
+
 static int32_t stbSplSplitSession(SSplitContext* pCxt, SStableSplitInfo* pInfo) {
-  return TSDB_CODE_PLAN_INTERNAL_ERROR;
+  if (pCxt->pPlanCxt->streamQuery) {
+    return stbSplSplitSessionForStream(pCxt, pInfo);
+  } else {
+    return TSDB_CODE_PLAN_INTERNAL_ERROR;
+  }
 }
 
 static int32_t stbSplSplitWindowNode(SSplitContext* pCxt, SStableSplitInfo* pInfo) {
@@ -537,10 +558,12 @@ static int32_t stbSplCreateMergeKeys(SNodeList* pSortKeys, SNodeList* pTargets,
   SNode*     pNode = NULL;
   FOREACH(pNode, pSortKeys) {
     SOrderByExprNode* pSortKey = (SOrderByExprNode*)pNode;
+    SExprNode*        pSortExpr = (SExprNode*)pSortKey->pExpr;
     SNode*            pTarget = NULL;
     bool              found = false;
     FOREACH(pTarget, pTargets) {
-      if (0 == strcmp(((SExprNode*)pSortKey->pExpr)->aliasName, ((SColumnNode*)pTarget)->colName)) {
+      if ((QUERY_NODE_COLUMN == nodeType(pSortExpr) && nodesEqualNode((SNode*)pSortExpr, pTarget)) ||
+          (0 == strcmp(pSortExpr->aliasName, ((SColumnNode*)pTarget)->colName))) {
         code = nodesListMakeStrictAppend(&pMergeKeys, stbSplCreateOrderByExpr(pSortKey, pTarget));
         if (TSDB_CODE_SUCCESS != code) {
           break;
@@ -549,7 +572,7 @@ static int32_t stbSplCreateMergeKeys(SNodeList* pSortKeys, SNodeList* pTargets,
       }
     }
     if (TSDB_CODE_SUCCESS == code && !found) {
-      SNode* pCol = stbSplCreateColumnNode((SExprNode*)pSortKey->pExpr);
+      SNode* pCol = stbSplCreateColumnNode(pSortExpr);
       code = nodesListMakeStrictAppend(&pMergeKeys, stbSplCreateOrderByExpr(pSortKey, pCol));
       if (TSDB_CODE_SUCCESS == code) {
         code = nodesListStrictAppend(pTargets, pCol);
diff --git a/source/libs/planner/test/planOrderByTest.cpp b/source/libs/planner/test/planOrderByTest.cpp
index b065ad0a59..2ca662cf86 100644
--- a/source/libs/planner/test/planOrderByTest.cpp
+++ b/source/libs/planner/test/planOrderByTest.cpp
@@ -28,6 +28,8 @@ TEST_F(PlanOrderByTest, basic) {
   // ORDER BY key is not in the projection list
   run("SELECT c1 FROM t1 ORDER BY c2");
 
+  run("SELECT c1 AS a FROM t1 ORDER BY a");
+
   run("SELECT c1 + 10 AS a FROM t1 ORDER BY a");
 }
 
@@ -59,4 +61,6 @@ TEST_F(PlanOrderByTest, stable) {
   run("SELECT c2 FROM st1 ORDER BY c1");
 
   run("SELECT c2 FROM st1 PARTITION BY c2 ORDER BY c1");
+
+  run("SELECT c1 AS a FROM st1 ORDER BY a");
 }
diff --git a/source/util/src/tenv.c b/source/util/src/tenv.c
index e717e82c5b..4fc0542816 100644
--- a/source/util/src/tenv.c
+++ b/source/util/src/tenv.c
@@ -72,6 +72,9 @@ int32_t taosEnvToCfg(const char *envStr, char *cfgStr) {
     if (cfgNameLen > 0) {
       memcpy(cfgStr, buf, cfgNameLen);
       memset(&cfgStr[cfgNameLen], ' ', p - cfgStr - cfgNameLen + 1);
+    } else {
+      *cfgStr = '\0';
+      return -1;
     }
   }
   return strlen(cfgStr);
diff --git a/tests/script/sh/copy_udf.bat b/tests/script/sh/copy_udf.bat
new file mode 100644
index 0000000000..5144cf8d25
--- /dev/null
+++ b/tests/script/sh/copy_udf.bat
@@ -0,0 +1,23 @@
+@echo off
+
+echo Executing copy_udf.bat
+set SCRIPT_DIR=%cd%
+echo SCRIPT_DIR: %SCRIPT_DIR%
+
+cd ..\..\..
+set TAOS_DIR=%cd%
+echo find udf library in %TAOS_DIR%
+set UDF1_DIR=%TAOS_DIR%\debug\build\lib\udf1.dll
+set UDF2_DIR=%TAOS_DIR%\debug\build\lib\udf2.dll
+
+echo %UDF1_DIR%
+echo %UDF2_DIR%
+
+set UDF_TMP=C:\Windows\Temp\udf
+rm -rf %UDF_TMP%
+mkdir %UDF_TMP%
+
+echo Copy udf shared library files to %UDF_TMP%
+
+cp %UDF1_DIR% %UDF_TMP%
+cp %UDF2_DIR% %UDF_TMP%
diff --git a/tests/script/tsim/query/udf.sim b/tests/script/tsim/query/udf.sim
index 93cae4e391..d9821a0495 100644
--- a/tests/script/tsim/query/udf.sim
+++ b/tests/script/tsim/query/udf.sim
@@ -19,8 +19,14 @@ sql show databases;
 sql create table t (ts timestamp, f int);
 sql insert into t values(now, 1)(now+1s, 2);
 
-sql create function udf1 as '/tmp/udf/libudf1.so' outputtype int bufSize 8;
-sql create aggregate function udf2 as '/tmp/udf/libudf2.so' outputtype double bufSize 8;
+system_content printf %OS%
+if $system_content == Windows_NT then
+  sql create function udf1 as 'C:\\Windows\\Temp\\udf1.dll' outputtype int bufSize 8;
+  sql create aggregate function udf2 as 'C:\\Windows\\Temp\\udf2.dll' outputtype double bufSize 8;
+else
+  sql create function udf1 as '/tmp/udf/libudf1.so' outputtype int bufSize 8;
+  sql create aggregate function udf2 as '/tmp/udf/libudf2.so' outputtype double bufSize 8;
+endi
 sql show functions;
 if $rows != 2 then
   return -1
diff --git a/tests/tsim/src/simExe.c b/tests/tsim/src/simExe.c
index dbc3c2c460..f97a13d2c5 100644
--- a/tests/tsim/src/simExe.c
+++ b/tests/tsim/src/simExe.c
@@ -458,11 +458,17 @@ bool simExecuteSystemContentCmd(SScript *script, char *option) {
   char buf[4096] = {0};
   char buf1[4096 + 512] = {0};
   char filename[400] = {0};
-  sprintf(filename, "%s/%s.tmp", simScriptDir, script->fileName);
+  sprintf(filename, "%s" TD_DIRSEP "%s.tmp", simScriptDir, script->fileName);
 
+#ifdef WINDOWS
+  sprintf(buf, "cd %s && ", simScriptDir);
+  simVisuallizeOption(script, option, buf + strlen(buf));
+  sprintf(buf1, "%s > %s 2>nul", buf, filename);
+#else
   sprintf(buf, "cd %s; ", simScriptDir);
   simVisuallizeOption(script, option, buf + strlen(buf));
   sprintf(buf1, "%s > %s 2>/dev/null", buf, filename);
+#endif
 
   sprintf(script->system_exit_code, "%d", system(buf1));
   simStoreSystemContentResult(script, filename);
diff --git a/tests/tsim/src/simParse.c b/tests/tsim/src/simParse.c
index 638c4a1ccb..5b6dda4dae 100644
--- a/tests/tsim/src/simParse.c
+++ b/tests/tsim/src/simParse.c
@@ -206,7 +206,7 @@ SScript *simParseScript(char *fileName) {
 
     for (int32_t i = 0; i < cmdlen; ++i) {
       if (buffer[i] == '\r' || buffer[i] == '\n') {
-        buffer[i] = ' ';
+        buffer[i] = '\0';
       }
     }