diff --git a/docs/en/14-reference/12-config/index.md b/docs/en/14-reference/12-config/index.md
index 65c48f9190..c1abfd3e39 100755
--- a/docs/en/14-reference/12-config/index.md
+++ b/docs/en/14-reference/12-config/index.md
@@ -226,9 +226,10 @@ Please note the `taoskeeper` needs to be installed and running to create the `lo
 | Attribute     | Description                                                                                                     |
 | ------------- | --------------------------------------------------------------------------------------------------------------- |
 | Applicable    | Client only                                                                                                     |
-| Meaning       | When the Last, First, LastRow function is queried, whether the returned column name contains the function name. |
-| Value Range   | 0 means including the function name, 1 means not including the function name.                                   |
-| Default Value | 0                                                                                                               |
+| Meaning       | When the Last, First, and LastRow functions are queried and no alias is specified, the alias is automatically set to the column name (excluding the function name). Therefore, if the order by clause refers to the column name, it will automatically refer to the function corresponding to the column. |
+| Value Range   | 1 means automatically setting the alias to the column name (excluding the function name), 0 means not automatically setting the alias.                                   |
+| Default Value | 0          |
+| Notes | When multiple of the above functions act on the same column at the same time and no alias is specified, if the order by clause refers to the column name, column selection ambiguous will occur because the aliases of multiple columns are the same. |
 
 ## Locale Parameters
 
diff --git a/docs/zh/14-reference/12-config/index.md b/docs/zh/14-reference/12-config/index.md
index 27a9618107..4d47f0771c 100755
--- a/docs/zh/14-reference/12-config/index.md
+++ b/docs/zh/14-reference/12-config/index.md
@@ -215,9 +215,10 @@ taos -C
 | 属性     | 说明                                                        |
 | -------- | ----------------------------------------------------------- |
 | 适用范围 | 仅客户端适用                                                |
-| 含义     | Last、First、LastRow 函数查询时，返回的列名是否包含函数名。 |
-| 取值范围 | 0 表示包含函数名，1 表示不包含函数名。                      |
-| 缺省值   | 0                                                           |
+| 含义     | Last、First、LastRow 函数查询且未指定别名时，自动设置别名为列名（不含函数名），因此 order by 子句如果引用了该列名将自动引用该列对应的函数 |
+| 取值范围 | 1 表示自动设置别名为列名(不包含函数名), 0 表示不自动设置别名。                      |
+| 缺省值   | 0                                                    |
+| 补充说明 | 当同时出现多个上述函数作用于同一列且未指定别名时，如果 order by 子句引用了该列名，将会因为多列别名相同引发列选择冲突|
 
 ### countAlwaysReturnValue
 
diff --git a/include/dnode/vnode/tqCommon.h b/include/dnode/vnode/tqCommon.h
index 39e0c07406..50458d684f 100644
--- a/include/dnode/vnode/tqCommon.h
+++ b/include/dnode/vnode/tqCommon.h
@@ -32,8 +32,9 @@ int32_t tqStreamTaskProcessDeployReq(SStreamMeta* pMeta, SMsgCb* cb, int64_t sve
                                      bool isLeader, bool restored);
 int32_t tqStreamTaskProcessDropReq(SStreamMeta* pMeta, char* msg, int32_t msgLen);
 int32_t tqStreamTaskProcessRunReq(SStreamMeta* pMeta, SRpcMsg* pMsg, bool isLeader);
-int32_t tqStreamTaskResetStatus(SStreamMeta* pMeta, int32_t* numOfTasks);
+int32_t tqStreamTaskResetStatus(SStreamMeta* pMeta);
 int32_t tqStartTaskCompleteCallback(SStreamMeta* pMeta);
+int32_t tqStreamTasksGetTotalNum(SStreamMeta* pMeta);
 int32_t tqStreamTaskProcessTaskResetReq(SStreamMeta* pMeta, SRpcMsg* pMsg);
 int32_t tqStreamTaskProcessTaskPauseReq(SStreamMeta* pMeta, char* pMsg);
 int32_t tqStreamTaskProcessTaskResumeReq(void* handle, int64_t sversion, char* pMsg, bool fromVnode);
diff --git a/include/libs/function/function.h b/include/libs/function/function.h
index ffaad69373..8863201094 100644
--- a/include/libs/function/function.h
+++ b/include/libs/function/function.h
@@ -249,6 +249,10 @@ typedef struct SPoint {
 int32_t taosGetLinearInterpolationVal(SPoint *point, int32_t outputType, SPoint *point1, SPoint *point2,
                                       int32_t inputType);
 
+#define LEASTSQUARES_DOUBLE_ITEM_LENGTH 25
+#define LEASTSQUARES_BUFF_LENGTH 128
+#define DOUBLE_PRECISION_DIGITS "16e"
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/include/libs/nodes/plannodes.h b/include/libs/nodes/plannodes.h
index 6cb83ebb51..8e375e9da8 100644
--- a/include/libs/nodes/plannodes.h
+++ b/include/libs/nodes/plannodes.h
@@ -156,6 +156,7 @@ typedef struct SProjectLogicNode {
   SNodeList* pProjections;
   char       stmtName[TSDB_TABLE_NAME_LEN];
   bool       ignoreGroupId;
+  bool       inputIgnoreGroup;
 } SProjectLogicNode;
 
 typedef struct SIndefRowsFuncLogicNode {
@@ -449,6 +450,7 @@ typedef struct SProjectPhysiNode {
   SNodeList* pProjections;
   bool       mergeDataBlock;
   bool       ignoreGroupId;
+  bool       inputIgnoreGroup;
 } SProjectPhysiNode;
 
 typedef struct SIndefRowsFuncPhysiNode {
diff --git a/include/libs/stream/tstream.h b/include/libs/stream/tstream.h
index 4e87e71137..c6923a2233 100644
--- a/include/libs/stream/tstream.h
+++ b/include/libs/stream/tstream.h
@@ -690,9 +690,9 @@ typedef struct STaskStatusEntry {
   int64_t verStart;            // start version in WAL, only valid for source task
   int64_t verEnd;              // end version in WAL, only valid for source task
   int64_t processedVer;        // only valid for source task
-  int64_t activeCheckpointId;     // current active checkpoint id
+  int64_t checkpointId;     // current active checkpoint id
   int32_t chkpointTransId;     // checkpoint trans id
-  bool    checkpointFailed;    // denote if the checkpoint is failed or not
+  int8_t  checkpointFailed;    // denote if the checkpoint is failed or not
   bool    inputQChanging;      // inputQ is changing or not
   int64_t inputQUnchangeCounter;
   double  inputQUsed;          // in MiB
@@ -875,6 +875,8 @@ void         streamMetaStartHb(SStreamMeta* pMeta);
 bool         streamMetaTaskInTimer(SStreamMeta* pMeta);
 int32_t      streamMetaAddTaskLaunchResult(SStreamMeta* pMeta, int64_t streamId, int32_t taskId, int64_t startTs,
                                                   int64_t endTs, bool ready);
+int32_t      streamMetaResetTaskStatus(SStreamMeta* pMeta);
+
 void         streamMetaRLock(SStreamMeta* pMeta);
 void         streamMetaRUnLock(SStreamMeta* pMeta);
 void         streamMetaWLock(SStreamMeta* pMeta);
@@ -887,6 +889,7 @@ int32_t      streamMetaStartAllTasks(SStreamMeta* pMeta);
 int32_t      streamMetaStopAllTasks(SStreamMeta* pMeta);
 int32_t      streamMetaStartOneTask(SStreamMeta* pMeta, int64_t streamId, int32_t taskId);
 bool         streamMetaAllTasksReady(const SStreamMeta* pMeta);
+tmr_h        streamTimerGetInstance();
 
 // checkpoint
 int32_t streamProcessCheckpointSourceReq(SStreamTask* pTask, SStreamCheckpointSourceReq* pReq);
diff --git a/include/util/taoserror.h b/include/util/taoserror.h
index b41078dfbf..b5389e60d3 100644
--- a/include/util/taoserror.h
+++ b/include/util/taoserror.h
@@ -744,6 +744,7 @@ int32_t* taosGetErrno();
 #define TSDB_CODE_PAR_INVALID_VIEW_QUERY        TAOS_DEF_ERROR_CODE(0, 0x266C)
 #define TSDB_CODE_PAR_COL_QUERY_MISMATCH        TAOS_DEF_ERROR_CODE(0, 0x266D)
 #define TSDB_CODE_PAR_VIEW_CONFLICT_WITH_TABLE  TAOS_DEF_ERROR_CODE(0, 0x266E)
+#define TSDB_CODE_PAR_ORDERBY_AMBIGUOUS         TAOS_DEF_ERROR_CODE(0, 0x266F)
 #define TSDB_CODE_PAR_INTERNAL_ERROR            TAOS_DEF_ERROR_CODE(0, 0x26FF)
 
 //planner
diff --git a/source/client/inc/clientInt.h b/source/client/inc/clientInt.h
index a6d5039be7..fd4776664c 100644
--- a/source/client/inc/clientInt.h
+++ b/source/client/inc/clientInt.h
@@ -155,6 +155,7 @@ typedef struct STscObj {
   int8_t         biMode;
   int32_t        acctId;
   uint32_t       connId;
+  int32_t        appHbMgrIdx;
   int64_t        id;         // ref ID returned by taosAddRef
   TdThreadMutex  mutex;      // used to protect the operation on db
   int32_t        numOfReqs;  // number of sqlObj bound to this connection
diff --git a/source/client/src/clientEnv.c b/source/client/src/clientEnv.c
index b6c5701915..f1e9e36433 100644
--- a/source/client/src/clientEnv.c
+++ b/source/client/src/clientEnv.c
@@ -283,6 +283,7 @@ void *createTscObj(const char *user, const char *auth, const char *db, int32_t c
 
   pObj->connType = connType;
   pObj->pAppInfo = pAppInfo;
+  pObj->appHbMgrIdx = pAppInfo->pAppHbMgr->idx;
   tstrncpy(pObj->user, user, sizeof(pObj->user));
   memcpy(pObj->pass, auth, TSDB_PASSWORD_LEN);
 
diff --git a/source/client/src/clientHb.c b/source/client/src/clientHb.c
index b3d9a9ced5..63a65d7c95 100644
--- a/source/client/src/clientHb.c
+++ b/source/client/src/clientHb.c
@@ -30,7 +30,7 @@ typedef struct {
   };
 } SHbParam;
 
-static SClientHbMgr clientHbMgr = {0};
+SClientHbMgr clientHbMgr = {0};
 
 static int32_t hbCreateThread();
 static void    hbStopThread();
@@ -1294,9 +1294,8 @@ void hbMgrCleanUp() {
 
   taosThreadMutexLock(&clientHbMgr.lock);
   appHbMgrCleanup();
-  taosArrayDestroy(clientHbMgr.appHbMgrs);
+  clientHbMgr.appHbMgrs = taosArrayDestroy(clientHbMgr.appHbMgrs);
   taosThreadMutexUnlock(&clientHbMgr.lock);
-  clientHbMgr.appHbMgrs = NULL;
 }
 
 int hbRegisterConnImpl(SAppHbMgr *pAppHbMgr, SClientHbKey connKey, int64_t clusterId) {
@@ -1335,19 +1334,18 @@ int hbRegisterConn(SAppHbMgr *pAppHbMgr, int64_t tscRefId, int64_t clusterId, in
 }
 
 void hbDeregisterConn(STscObj *pTscObj, SClientHbKey connKey) {
-  SAppHbMgr    *pAppHbMgr = pTscObj->pAppInfo->pAppHbMgr;
-  SClientHbReq *pReq = taosHashAcquire(pAppHbMgr->activeInfo, &connKey, sizeof(SClientHbKey));
-  if (pReq) {
-    tFreeClientHbReq(pReq);
-    taosHashRemove(pAppHbMgr->activeInfo, &connKey, sizeof(SClientHbKey));
-    taosHashRelease(pAppHbMgr->activeInfo, pReq);
+  taosThreadMutexLock(&clientHbMgr.lock);
+  SAppHbMgr *pAppHbMgr = taosArrayGetP(clientHbMgr.appHbMgrs, pTscObj->appHbMgrIdx);
+  if (pAppHbMgr) {
+    SClientHbReq *pReq = taosHashAcquire(pAppHbMgr->activeInfo, &connKey, sizeof(SClientHbKey));
+    if (pReq) {
+      tFreeClientHbReq(pReq);
+      taosHashRemove(pAppHbMgr->activeInfo, &connKey, sizeof(SClientHbKey));
+      taosHashRelease(pAppHbMgr->activeInfo, pReq);
+      atomic_sub_fetch_32(&pAppHbMgr->connKeyCnt, 1);
+    }
   }
-
-  if (NULL == pReq) {
-    return;
-  }
-
-  atomic_sub_fetch_32(&pAppHbMgr->connKeyCnt, 1);
+  taosThreadMutexUnlock(&clientHbMgr.lock);
 }
 
 // set heart beat thread quit mode , if quicByKill 1 then kill thread else quit from inner
diff --git a/source/client/src/clientMsgHandler.c b/source/client/src/clientMsgHandler.c
index e0cedb9924..324b99022b 100644
--- a/source/client/src/clientMsgHandler.c
+++ b/source/client/src/clientMsgHandler.c
@@ -26,6 +26,8 @@
 #include "tname.h"
 #include "tversion.h"
 
+extern SClientHbMgr clientHbMgr;
+
 static void setErrno(SRequestObj* pRequest, int32_t code) {
   pRequest->code = code;
   terrno = code;
@@ -63,8 +65,9 @@ int32_t processConnectRsp(void* param, SDataBuf* pMsg, int32_t code) {
 
   STscObj* pTscObj = pRequest->pTscObj;
 
-  if (NULL == pTscObj->pAppInfo || NULL == pTscObj->pAppInfo->pAppHbMgr) {
-    setErrno(pRequest, TSDB_CODE_TSC_DISCONNECTED);
+  if (NULL == pTscObj->pAppInfo) {
+    code = TSDB_CODE_TSC_DISCONNECTED;
+    setErrno(pRequest, code);
     tsem_post(&pRequest->body.rspSem);
     goto End;
   }
@@ -95,7 +98,8 @@ int32_t processConnectRsp(void* param, SDataBuf* pMsg, int32_t code) {
   }
 
   if (connectRsp.epSet.numOfEps == 0) {
-    setErrno(pRequest, TSDB_CODE_APP_ERROR);
+    code = TSDB_CODE_APP_ERROR;
+    setErrno(pRequest, code);
     tsem_post(&pRequest->body.rspSem);
     goto End;
   }
@@ -142,7 +146,18 @@ int32_t processConnectRsp(void* param, SDataBuf* pMsg, int32_t code) {
   pTscObj->authVer = connectRsp.authVer;
   pTscObj->whiteListInfo.ver = connectRsp.whiteListVer;
 
-  hbRegisterConn(pTscObj->pAppInfo->pAppHbMgr, pTscObj->id, connectRsp.clusterId, connectRsp.connType);
+  taosThreadMutexLock(&clientHbMgr.lock);
+  SAppHbMgr* pAppHbMgr = taosArrayGetP(clientHbMgr.appHbMgrs, pTscObj->appHbMgrIdx);
+  if (pAppHbMgr) {
+    hbRegisterConn(pAppHbMgr, pTscObj->id, connectRsp.clusterId, connectRsp.connType);
+  } else {
+    taosThreadMutexUnlock(&clientHbMgr.lock);
+    code = TSDB_CODE_TSC_DISCONNECTED;
+    setErrno(pRequest, code);
+    tsem_post(&pRequest->body.rspSem);
+    goto End;
+  }
+  taosThreadMutexUnlock(&clientHbMgr.lock);
 
   tscDebug("0x%" PRIx64 " clusterId:%" PRId64 ", totalConn:%" PRId64, pRequest->requestId, connectRsp.clusterId,
            pTscObj->pAppInfo->numOfConns);
diff --git a/source/dnode/mnode/impl/src/mndStream.c b/source/dnode/mnode/impl/src/mndStream.c
index a9e2277264..441305f282 100644
--- a/source/dnode/mnode/impl/src/mndStream.c
+++ b/source/dnode/mnode/impl/src/mndStream.c
@@ -2374,7 +2374,7 @@ static int32_t mndProcessVgroupChange(SMnode *pMnode, SVgroupChangeInfo *pChange
     sdbRelease(pSdb, pStream);
 
     if (conflict) {
-      mWarn("nodeUpdate trans in progress, current nodeUpdate ignored");
+      mError("nodeUpdate conflict with other trans, current nodeUpdate ignored");
       sdbCancelFetch(pSdb, pIter);
       return -1;
     }
@@ -2587,14 +2587,22 @@ int32_t removeExpirednodeEntryAndTask(SArray *pNodeSnapshot) {
 
 // kill all trans in the dst DB
 static void killAllCheckpointTrans(SMnode *pMnode, SVgroupChangeInfo *pChangeInfo) {
+  mDebug("start to clear checkpoints in all Dbs");
+
   void *pIter = NULL;
   while ((pIter = taosHashIterate(pChangeInfo->pDBMap, pIter)) != NULL) {
     char *pDb = (char *)pIter;
 
     size_t len = 0;
     void  *pKey = taosHashGetKey(pDb, &len);
+    char  *p = strndup(pKey, len);
+
+    mDebug("clear checkpoint trans in Db:%s", p);
     doKillCheckpointTrans(pMnode, pKey, len);
+    taosMemoryFree(p);
   }
+
+  mDebug("complete clear checkpoints in Dbs");
 }
 
 // this function runs by only one thread, so it is not multi-thread safe
@@ -2649,7 +2657,7 @@ static int32_t mndProcessNodeCheckReq(SRpcMsg *pMsg) {
       execInfo.pNodeList = pNodeSnapshot;
       execInfo.ts = ts;
     } else {
-      mDebug("unexpect code during create nodeUpdate trans, code:%s", tstrerror(code));
+      mError("unexpected code during create nodeUpdate trans, code:%s", tstrerror(code));
       taosArrayDestroy(pNodeSnapshot);
     }
   } else {
@@ -2844,6 +2852,8 @@ void killTransImpl(SMnode *pMnode, int32_t transId, const char *pDbName) {
     mInfo("kill active transId:%d in Db:%s", transId, pDbName);
     mndKillTrans(pMnode, pTrans);
     mndReleaseTrans(pMnode, pTrans);
+  } else {
+    mError("failed to acquire trans in Db:%s, transId:%d", pDbName, transId);
   }
 }
 
@@ -2869,15 +2879,7 @@ int32_t doKillCheckpointTrans(SMnode *pMnode, const char *pDBName, size_t len) {
 
 static int32_t mndResetStatusFromCheckpoint(SMnode *pMnode, int64_t streamId, int32_t transId) {
   int32_t code = TSDB_CODE_SUCCESS;
-
-  STrans *pTrans = mndAcquireTrans(pMnode, transId);
-  if (pTrans != NULL) {
-    mInfo("kill checkpoint transId:%d to reset task status", transId);
-    mndKillTrans(pMnode, pTrans);
-    mndReleaseTrans(pMnode, pTrans);
-  } else {
-    mError("failed to acquire checkpoint trans:%d", transId);
-  }
+  killTransImpl(pMnode, transId, "");
 
   SStreamObj *pStream = mndGetStreamObj(pMnode, streamId);
   if (pStream == NULL) {
@@ -3033,7 +3035,7 @@ int32_t mndProcessStreamHb(SRpcMsg *pReq) {
   SStreamHbMsg req = {0};
 
   bool    checkpointFailed = false;
-  int64_t activeCheckpointId = 0;
+  int64_t checkpointId = 0;
   int64_t streamId = 0;
   int32_t transId = 0;
 
@@ -3095,14 +3097,17 @@ int32_t mndProcessStreamHb(SRpcMsg *pReq) {
       }
 
       streamTaskStatusCopy(pTaskEntry, p);
-      if (p->activeCheckpointId != 0) {
-        if (activeCheckpointId != 0) {
-          ASSERT(activeCheckpointId == p->activeCheckpointId);
+      if (p->checkpointId != 0) {
+        if (checkpointId != 0) {
+          ASSERT(checkpointId == p->checkpointId);
         } else {
-          activeCheckpointId = p->activeCheckpointId;
+          checkpointId = p->checkpointId;
         }
 
         if (p->checkpointFailed) {
+          mError("stream task:0x%" PRIx64 " checkpointId:%" PRIx64 " transId:%d failed, kill it", p->id.taskId,
+                 p->checkpointId, p->chkpointTransId);
+
           checkpointFailed = p->checkpointFailed;
           streamId = p->id.streamId;
           transId = p->chkpointTransId;
@@ -3124,17 +3129,17 @@ int32_t mndProcessStreamHb(SRpcMsg *pReq) {
 
   // current checkpoint is failed, rollback from the checkpoint trans
   // kill the checkpoint trans and then set all tasks status to be normal
-  if (checkpointFailed && activeCheckpointId != 0) {
+  if (checkpointFailed && checkpointId != 0) {
     bool    allReady = true;
     SArray *p = mndTakeVgroupSnapshot(pMnode, &allReady);
     taosArrayDestroy(p);
 
     if (allReady || snodeChanged) {
       // if the execInfo.activeCheckpoint == 0, the checkpoint is restoring from wal
-      mInfo("checkpointId:%" PRId64 " failed, issue task-reset trans to reset all tasks status", activeCheckpointId);
+      mInfo("checkpointId:%" PRId64 " failed, issue task-reset trans to reset all tasks status", checkpointId);
       mndResetStatusFromCheckpoint(pMnode, streamId, transId);
     } else {
-      mInfo("not all vgroups are ready, wait for next HB from stream tasks");
+      mInfo("not all vgroups are ready, wait for next HB from stream tasks to reset the task status");
     }
   }
 
@@ -3148,6 +3153,7 @@ void freeCheckpointCandEntry(void *param) {
   SCheckpointCandEntry *pEntry = param;
   taosMemoryFreeClear(pEntry->pName);
 }
+
 SStreamObj *mndGetStreamObj(SMnode *pMnode, int64_t streamId) {
   void       *pIter = NULL;
   SSdb       *pSdb = pMnode->pSdb;
diff --git a/source/dnode/mnode/impl/src/mndStreamTrans.c b/source/dnode/mnode/impl/src/mndStreamTrans.c
index 847f55a8fd..a6dd1c4856 100644
--- a/source/dnode/mnode/impl/src/mndStreamTrans.c
+++ b/source/dnode/mnode/impl/src/mndStreamTrans.c
@@ -89,7 +89,7 @@ bool mndStreamTransConflictCheck(SMnode* pMnode, int64_t streamUid, const char*
     }
 
     if (strcmp(tInfo.name, MND_STREAM_CHECKPOINT_NAME) == 0) {
-      if (strcmp(pTransName, MND_STREAM_DROP_NAME) != 0) {
+      if ((strcmp(pTransName, MND_STREAM_DROP_NAME) != 0) && (strcmp(pTransName, MND_STREAM_TASK_RESET_NAME) != 0)) {
         mWarn("conflict with other transId:%d streamUid:0x%" PRIx64 ", trans:%s", tInfo.transId, tInfo.streamUid,
               tInfo.name);
         terrno = TSDB_CODE_MND_TRANS_CONFLICT;
diff --git a/source/dnode/snode/src/snode.c b/source/dnode/snode/src/snode.c
index 4815dfe65c..4284b0838e 100644
--- a/source/dnode/snode/src/snode.c
+++ b/source/dnode/snode/src/snode.c
@@ -145,8 +145,7 @@ FAIL:
 }
 
 int32_t sndInit(SSnode *pSnode) {
-  int32_t numOfTasks = 0;
-  tqStreamTaskResetStatus(pSnode->pMeta, &numOfTasks);
+  streamMetaResetTaskStatus(pSnode->pMeta);
   streamMetaStartAllTasks(pSnode->pMeta);
   return 0;
 }
diff --git a/source/dnode/vnode/src/inc/tq.h b/source/dnode/vnode/src/inc/tq.h
index a7fd35773d..cded4ddd7c 100644
--- a/source/dnode/vnode/src/inc/tq.h
+++ b/source/dnode/vnode/src/inc/tq.h
@@ -107,7 +107,6 @@ struct STQ {
   TTB*            pExecStore;
   TTB*            pCheckStore;
   SStreamMeta*    pStreamMeta;
-  void*           tqTimer;
 };
 
 int32_t tEncodeSTqHandle(SEncoder* pEncoder, const STqHandle* pHandle);
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index 1fc7402363..9ae4fa5e19 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -26,18 +26,6 @@ static FORCE_INLINE bool tqIsHandleExec(STqHandle* pHandle) { return TMQ_HANDLE_
 static FORCE_INLINE void tqSetHandleExec(STqHandle* pHandle) { pHandle->status = TMQ_HANDLE_STATUS_EXEC; }
 static FORCE_INLINE void tqSetHandleIdle(STqHandle* pHandle) { pHandle->status = TMQ_HANDLE_STATUS_IDLE; }
 
-static int32_t tqTimerInit(STQ* pTq) {
-  pTq->tqTimer = taosTmrInit(100, 100, 1000, "TQ");
-  if (pTq->tqTimer == NULL) {
-    return -1;
-  }
-  return 0;
-}
-
-static void tqTimerCleanUp(STQ* pTq) {
-  taosTmrCleanUp(pTq->tqTimer);
-}
-
 void tqDestroyTqHandle(void* data) {
   STqHandle* pData = (STqHandle*)data;
   qDestroyTask(pData->execHandle.task);
@@ -118,7 +106,6 @@ int32_t tqInitialize(STQ* pTq) {
     return -1;
   }
 
-  tqTimerInit(pTq);
   return 0;
 }
 
@@ -149,7 +136,6 @@ void tqClose(STQ* pTq) {
   taosMemoryFree(pTq->path);
   tqMetaClose(pTq);
   streamMetaClose(pTq->pStreamMeta);
-  tqTimerCleanUp(pTq);
 
   qDebug("end to close tq");
   taosMemoryFree(pTq);
diff --git a/source/dnode/vnode/src/tq/tqStreamTask.c b/source/dnode/vnode/src/tq/tqStreamTask.c
index 2a600d08ef..cdb5cc26f8 100644
--- a/source/dnode/vnode/src/tq/tqStreamTask.c
+++ b/source/dnode/vnode/src/tq/tqStreamTask.c
@@ -95,10 +95,14 @@ int32_t tqScanWalInFuture(STQ* pTq, int32_t numOfTasks, int32_t idleDuration) {
 
   pParam->pTq = pTq;
   pParam->numOfTasks = numOfTasks;
+
+  tmr_h pTimer = streamTimerGetInstance();
+  ASSERT(pTimer);
+
   if (pMeta->scanInfo.scanTimer == NULL) {
-    pMeta->scanInfo.scanTimer = taosTmrStart(doStartScanWal, idleDuration, pParam, pTq->tqTimer);
+    pMeta->scanInfo.scanTimer = taosTmrStart(doStartScanWal, idleDuration, pParam, pTimer);
   } else {
-    taosTmrReset(doStartScanWal, idleDuration, pParam, pTq->tqTimer, &pMeta->scanInfo.scanTimer);
+    taosTmrReset(doStartScanWal, idleDuration, pParam, pTimer, &pMeta->scanInfo.scanTimer);
   }
 
   return TSDB_CODE_SUCCESS;
@@ -175,11 +179,11 @@ int32_t tqStopStreamTasksAsync(STQ* pTq) {
   SStreamTaskRunReq* pRunReq = rpcMallocCont(sizeof(SStreamTaskRunReq));
   if (pRunReq == NULL) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
-    tqError("vgId:%d failed to create msg to stop tasks, code:%s", vgId, terrstr());
+    tqError("vgId:%d failed to create msg to stop tasks async, code:%s", vgId, terrstr());
     return -1;
   }
 
-  tqDebug("vgId:%d create msg to stop tasks", vgId);
+  tqDebug("vgId:%d create msg to stop all tasks async", vgId);
 
   pRunReq->head.vgId = vgId;
   pRunReq->streamId = 0;
diff --git a/source/dnode/vnode/src/tqCommon/tqCommon.c b/source/dnode/vnode/src/tqCommon/tqCommon.c
index e2dc9fa679..00b3860565 100644
--- a/source/dnode/vnode/src/tqCommon/tqCommon.c
+++ b/source/dnode/vnode/src/tqCommon/tqCommon.c
@@ -103,8 +103,7 @@ int32_t tqStreamTaskProcessUpdateReq(SStreamMeta* pMeta, SMsgCb* cb, SRpcMsg* pM
   STaskId       id = {.streamId = req.streamId, .taskId = req.taskId};
   SStreamTask** ppTask = (SStreamTask**)taosHashGet(pMeta->pTasksMap, &id, sizeof(id));
   if (ppTask == NULL || *ppTask == NULL) {
-    tqError("vgId:%d failed to acquire task:0x%x when handling update, it may have been dropped already", vgId,
-            req.taskId);
+    tqError("vgId:%d failed to acquire task:0x%x when handling update, it may have been dropped", vgId, req.taskId);
     rsp.code = TSDB_CODE_SUCCESS;
     streamMetaWUnLock(pMeta);
 
@@ -124,6 +123,7 @@ int32_t tqStreamTaskProcessUpdateReq(SStreamMeta* pMeta, SMsgCb* cb, SRpcMsg* pM
     tqDebug("s-task:%s recv trans to update nodeEp from mnode, transId:%d", idstr, req.transId);
   }
 
+  // duplicate update epset msg received, discard this redundant message
   STaskUpdateEntry entry = {.streamId = req.streamId, .taskId = req.taskId, .transId = req.transId};
 
   void* pReqTask = taosHashGet(pMeta->updateInfo.pTasks, &entry, sizeof(STaskUpdateEntry));
@@ -135,7 +135,6 @@ int32_t tqStreamTaskProcessUpdateReq(SStreamMeta* pMeta, SMsgCb* cb, SRpcMsg* pM
     return rsp.code;
   }
 
-  // the following two functions should not be executed within the scope of meta lock to avoid deadlock
   streamTaskUpdateEpsetInfo(pTask, req.pNodeList);
   streamTaskResetStatus(pTask);
 
@@ -159,11 +158,6 @@ int32_t tqStreamTaskProcessUpdateReq(SStreamMeta* pMeta, SMsgCb* cb, SRpcMsg* pM
       streamMetaSaveTask(pMeta, *ppHTask);
     }
 
-#if 0
-    if (streamMetaCommit(pMeta) < 0) {
-      //     persist to disk
-    }
-#endif
   } else {
     tqDebug("s-task:%s vgId:%d not save since restore not finish", idstr, vgId);
   }
@@ -171,7 +165,7 @@ int32_t tqStreamTaskProcessUpdateReq(SStreamMeta* pMeta, SMsgCb* cb, SRpcMsg* pM
   tqDebug("s-task:%s vgId:%d start to stop task after save task", idstr, vgId);
   streamTaskStop(pTask);
 
-  // keep the already handled info
+  // keep the already updated info
   taosHashPut(pMeta->updateInfo.pTasks, &entry, sizeof(entry), NULL, 0);
 
   if (ppHTask != NULL) {
@@ -200,6 +194,10 @@ int32_t tqStreamTaskProcessUpdateReq(SStreamMeta* pMeta, SMsgCb* cb, SRpcMsg* pM
             updateTasks, (numOfTasks - updateTasks));
     streamMetaWUnLock(pMeta);
   } else {
+    if (streamMetaCommit(pMeta) < 0) {
+      //     persist to disk
+    }
+
     if (!restored) {
       tqDebug("vgId:%d vnode restore not completed, not start the tasks, clear the start after nodeUpdate flag", vgId);
       pMeta->startInfo.tasksWillRestart = 0;
@@ -686,16 +684,16 @@ int32_t tqStreamTaskProcessDropReq(SStreamMeta* pMeta, char* msg, int32_t msgLen
   return 0;
 }
 
-int32_t tqStreamTaskResetStatus(SStreamMeta* pMeta, int32_t* numOfTasks) {
+int32_t tqStreamTaskResetStatus(SStreamMeta* pMeta) {
   int32_t vgId = pMeta->vgId;
-  *numOfTasks = taosArrayGetSize(pMeta->pTaskList);
+  int32_t numOfTasks = taosArrayGetSize(pMeta->pTaskList);
 
-  tqDebug("vgId:%d reset all %d stream task(s) status to be uninit", vgId, *numOfTasks);
-  if (*numOfTasks == 0) {
+  tqDebug("vgId:%d reset all %d stream task(s) status to be uninit", vgId, numOfTasks);
+  if (numOfTasks == 0) {
     return TSDB_CODE_SUCCESS;
   }
 
-  for (int32_t i = 0; i < (*numOfTasks); ++i) {
+  for (int32_t i = 0; i < numOfTasks; ++i) {
     SStreamTaskId* pTaskId = taosArrayGet(pMeta->pTaskList, i);
 
     STaskId       id = {.streamId = pTaskId->streamId, .taskId = pTaskId->taskId};
@@ -754,8 +752,7 @@ static int32_t restartStreamTasks(SStreamMeta* pMeta, bool isLeader) {
   }
 
   if (isLeader && !tsDisableStream) {
-    int32_t numOfTasks = 0;
-    tqStreamTaskResetStatus(pMeta, &numOfTasks);
+    streamMetaResetTaskStatus(pMeta);
     streamMetaWUnLock(pMeta);
 
     streamMetaStartAllTasks(pMeta);
@@ -965,8 +962,7 @@ static int32_t tqProcessTaskResumeImpl(void* handle, SStreamTask* pTask, int64_t
   } else if (status == TASK_STATUS__UNINIT) {
     // todo: fill-history task init ?
     if (pTask->info.fillHistory == 0) {
-      EStreamTaskEvent event = /*HAS_RELATED_FILLHISTORY_TASK(pTask) ? TASK_EVENT_INIT_STREAM_SCANHIST : */TASK_EVENT_INIT;
-      streamTaskHandleEvent(pTask->status.pSM, event);
+      streamTaskHandleEvent(pTask->status.pSM, TASK_EVENT_INIT);
     }
   }
 
@@ -990,4 +986,8 @@ int32_t tqStreamTaskProcessTaskResumeReq(void* handle, int64_t sversion, char* m
   }
 
   return code;
+}
+
+int32_t tqStreamTasksGetTotalNum(SStreamMeta* pMeta) {
+  return taosArrayGetSize(pMeta->pTaskList);
 }
\ No newline at end of file
diff --git a/source/dnode/vnode/src/tsdb/tsdbCache.c b/source/dnode/vnode/src/tsdb/tsdbCache.c
index d86219542f..cc0bf2b774 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCache.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCache.c
@@ -941,7 +941,7 @@ static int32_t tsdbCacheLoadFromRaw(STsdb *pTsdb, tb_uid_t uid, SArray *pLastArr
   }
 
   if(lastrowTmpIndexArray != NULL) {
-    mergeLastCid(uid, pTsdb, &lastrowTmpColArray, pr, lastrowColIds, lastrowIndex, lastrowSlotIds);
+    mergeLastRowCid(uid, pTsdb, &lastrowTmpColArray, pr, lastrowColIds, lastrowIndex, lastrowSlotIds);
     for(int i = 0; i < taosArrayGetSize(lastrowTmpColArray); i++) {
       taosArrayInsert(pTmpColArray, *(int32_t*)taosArrayGet(lastrowTmpIndexArray, i), taosArrayGet(lastrowTmpColArray, i));
     }
diff --git a/source/dnode/vnode/src/tsdb/tsdbRead2.c b/source/dnode/vnode/src/tsdb/tsdbRead2.c
index e958600093..609f38cead 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRead2.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRead2.c
@@ -4120,8 +4120,10 @@ void tsdbReaderClose2(STsdbReader* pReader) {
   taosMemoryFreeClear(pReader->status.uidList.tableUidList);
 
   qTrace("tsdb/reader-close: %p, untake snapshot", pReader);
-  tsdbUntakeReadSnap2(pReader, pReader->pReadSnap, true);
-  pReader->pReadSnap = NULL;
+  void* p = pReader->pReadSnap;
+  if ((p == atomic_val_compare_exchange_ptr((void**)&pReader->pReadSnap, p, NULL)) && (p != NULL)) {
+    tsdbUntakeReadSnap2(pReader, p, true);
+  }
 
   tsem_destroy(&pReader->resumeAfterSuspend);
   tsdbReleaseReader(pReader);
@@ -4195,8 +4197,12 @@ int32_t tsdbReaderSuspend2(STsdbReader* pReader) {
     doSuspendCurrentReader(pReader);
   }
 
-  tsdbUntakeReadSnap2(pReader, pReader->pReadSnap, false);
-  pReader->pReadSnap = NULL;
+  // make sure only release once
+  void* p = pReader->pReadSnap;
+  if ((p == atomic_val_compare_exchange_ptr((void**)&pReader->pReadSnap, p, NULL)) && (p != NULL)) {
+    tsdbUntakeReadSnap2(pReader, p, false);
+  }
+
   if (pReader->bFilesetDelimited) {
     pReader->status.memTableMinKey = INT64_MAX;
     pReader->status.memTableMaxKey = INT64_MIN;
diff --git a/source/dnode/vnode/src/vnd/vnodeSync.c b/source/dnode/vnode/src/vnd/vnodeSync.c
index e6a80757ff..8844e358d5 100644
--- a/source/dnode/vnode/src/vnd/vnodeSync.c
+++ b/source/dnode/vnode/src/vnd/vnodeSync.c
@@ -570,9 +570,7 @@ static void vnodeRestoreFinish(const SSyncFSM *pFsm, const SyncIndex commitIdx)
       vInfo("vgId:%d, sync restore finished, not launch stream tasks, since stream tasks are disabled", vgId);
     } else {
       vInfo("vgId:%d sync restore finished, start to launch stream task(s)", pVnode->config.vgId);
-      int32_t numOfTasks = 0;
-      tqStreamTaskResetStatus(pMeta, &numOfTasks);
-
+      int32_t numOfTasks = tqStreamTasksGetTotalNum(pMeta);
       if (numOfTasks > 0) {
         if (pMeta->startInfo.taskStarting == 1) {
           pMeta->startInfo.restartCount += 1;
@@ -580,6 +578,7 @@ static void vnodeRestoreFinish(const SSyncFSM *pFsm, const SyncIndex commitIdx)
                   pMeta->startInfo.restartCount);
         } else {
           pMeta->startInfo.taskStarting = 1;
+
           streamMetaWUnLock(pMeta);
           tqStreamTaskStartAsync(pMeta, &pVnode->msgCb, false);
           return;
diff --git a/source/libs/executor/inc/executorInt.h b/source/libs/executor/inc/executorInt.h
index c3f47cde9d..64c14456b6 100644
--- a/source/libs/executor/inc/executorInt.h
+++ b/source/libs/executor/inc/executorInt.h
@@ -200,6 +200,7 @@ typedef struct SExchangeInfo {
   uint64_t            self;
   SLimitInfo          limitInfo;
   int64_t             openedTs;  // start exec time stamp, todo: move to SLoadRemoteDataInfo
+  char*               pTaskId;
 } SExchangeInfo;
 
 typedef struct SScanInfo {
@@ -272,7 +273,8 @@ typedef struct STableScanInfo {
   SSampleExecInfo sample;  // sample execution info
   int32_t         tableStartIndex;    // current group scan start
   int32_t         tableEndIndex;      // current group scan end
-  int32_t         currentGroupIndex;  // current group index of groupOffset
+  int32_t         currentGroupId;
+  int32_t         currentTable;  
   int8_t          scanMode;
   int8_t          assignBlockUid;
   uint8_t         countState;     // empty table count state
diff --git a/source/libs/executor/src/exchangeoperator.c b/source/libs/executor/src/exchangeoperator.c
index 2797cb2d82..06dd43e170 100644
--- a/source/libs/executor/src/exchangeoperator.c
+++ b/source/libs/executor/src/exchangeoperator.c
@@ -260,14 +260,17 @@ static int32_t initDataSource(int32_t numOfSources, SExchangeInfo* pInfo, const
     return TSDB_CODE_SUCCESS;
   }
 
+  int32_t len = strlen(id) + 1;
+  pInfo->pTaskId = taosMemoryCalloc(1, len);
+  strncpy(pInfo->pTaskId, id, len);
   for (int32_t i = 0; i < numOfSources; ++i) {
     SSourceDataInfo dataInfo = {0};
     dataInfo.status = EX_SOURCE_DATA_NOT_READY;
-    dataInfo.taskId = id;
+    dataInfo.taskId = pInfo->pTaskId;
     dataInfo.index = i;
     SSourceDataInfo* pDs = taosArrayPush(pInfo->pSourceDataInfo, &dataInfo);
     if (pDs == NULL) {
-      taosArrayDestroy(pInfo->pSourceDataInfo);
+      taosArrayDestroyEx(pInfo->pSourceDataInfo, freeSourceDataInfo);
       return TSDB_CODE_OUT_OF_MEMORY;
     }
   }
@@ -383,6 +386,8 @@ void doDestroyExchangeOperatorInfo(void* param) {
   tSimpleHashCleanup(pExInfo->pHashSources);
 
   tsem_destroy(&pExInfo->ready);
+  taosMemoryFreeClear(pExInfo->pTaskId);
+
   taosMemoryFreeClear(param);
 }
 
@@ -782,7 +787,7 @@ int32_t addSingleExchangeSource(SOperatorInfo* pOperator, SExchangeOperatorBasic
   if (pIdx->inUseIdx < 0) {
     SSourceDataInfo dataInfo = {0};
     dataInfo.status = EX_SOURCE_DATA_NOT_READY;
-    dataInfo.taskId = GET_TASKID(pOperator->pTaskInfo);
+    dataInfo.taskId = pExchangeInfo->pTaskId;
     dataInfo.index = pIdx->srcIdx;
     dataInfo.pSrcUidList = taosArrayDup(pBasicParam->uidList, NULL);
     dataInfo.srcOpType = pBasicParam->srcOpType;
diff --git a/source/libs/executor/src/executil.c b/source/libs/executor/src/executil.c
index 1da7818c3c..033cda43f2 100644
--- a/source/libs/executor/src/executil.c
+++ b/source/libs/executor/src/executil.c
@@ -646,10 +646,6 @@ int32_t getColInfoResultForGroupby(void* pVnode, SNodeList* group, STableListInf
     }
   }
 
-  if (initRemainGroups) {
-    pTableListInfo->numOfOuputGroups = taosHashGetSize(pTableListInfo->remainGroups);
-  }
-
   if (tsTagFilterCache) {
     tableList = taosArrayDup(pTableListInfo->pTableList, NULL);
     pAPI->metaFn.metaPutTbGroupToCache(pVnode, pTableListInfo->idInfo.suid, context.digest, tListLen(context.digest),
@@ -2142,6 +2138,8 @@ int32_t buildGroupIdMapForAllTables(STableListInfo* pTableListInfo, SReadHandle*
       pTableListInfo->numOfOuputGroups = numOfTables;
     } else if (groupByTbname && pScanNode->groupOrderScan){
       pTableListInfo->numOfOuputGroups = numOfTables;
+    } else if (groupByTbname && tsCountAlwaysReturnValue && ((STableScanPhysiNode*)pScanNode)->needCountEmptyTable) {
+      pTableListInfo->numOfOuputGroups = numOfTables;
     } else {
       pTableListInfo->numOfOuputGroups = 1;
     }
@@ -2159,6 +2157,8 @@ int32_t buildGroupIdMapForAllTables(STableListInfo* pTableListInfo, SReadHandle*
       return code;
     }
 
+    if (pScanNode->groupOrderScan) pTableListInfo->numOfOuputGroups = taosArrayGetSize(pTableListInfo->pTableList);
+
     if (groupSort || pScanNode->groupOrderScan) {
       code = sortTableGroup(pTableListInfo);
     }
diff --git a/source/libs/executor/src/executor.c b/source/libs/executor/src/executor.c
index eb84cb0639..e872c87237 100644
--- a/source/libs/executor/src/executor.c
+++ b/source/libs/executor/src/executor.c
@@ -1264,7 +1264,7 @@ int32_t qStreamPrepareScan(qTaskInfo_t tinfo, STqOffsetVal* pOffset, int8_t subT
           STableKeyInfo* pTableInfo = tableListGetInfo(pTableListInfo, 0);
           uid = pTableInfo->uid;
           ts = INT64_MIN;
-          pScanInfo->tableEndIndex = 0;
+          pScanInfo->currentTable = 0;
         } else {
           taosRUnLockLatch(&pTaskInfo->lock);
           qError("no table in table list, %s", id);
@@ -1278,16 +1278,16 @@ int32_t qStreamPrepareScan(qTaskInfo_t tinfo, STqOffsetVal* pOffset, int8_t subT
       pInfo->pTableScanOp->resultInfo.totalRows = 0;
 
       // start from current accessed position
-      // we cannot start from the pScanInfo->tableEndIndex, since the commit offset may cause the rollback of the start
+      // we cannot start from the pScanInfo->currentTable, since the commit offset may cause the rollback of the start
       // position, let's find it from the beginning.
       index = tableListFind(pTableListInfo, uid, 0);
       taosRUnLockLatch(&pTaskInfo->lock);
 
       if (index >= 0) {
-        pScanInfo->tableEndIndex = index;
+        pScanInfo->currentTable = index;
       } else {
         qError("vgId:%d uid:%" PRIu64 " not found in table list, total:%d, index:%d %s", pTaskInfo->id.vgId, uid,
-               numOfTables, pScanInfo->tableEndIndex, id);
+               numOfTables, pScanInfo->currentTable, id);
         terrno = TSDB_CODE_PAR_INTERNAL_ERROR;
         return -1;
       }
@@ -1310,12 +1310,12 @@ int32_t qStreamPrepareScan(qTaskInfo_t tinfo, STqOffsetVal* pOffset, int8_t subT
         }
 
         qDebug("tsdb reader created with offset(snapshot) uid:%" PRId64 " ts:%" PRId64 " table index:%d, total:%d, %s",
-               uid, pScanBaseInfo->cond.twindows.skey, pScanInfo->tableEndIndex, numOfTables, id);
+               uid, pScanBaseInfo->cond.twindows.skey, pScanInfo->currentTable, numOfTables, id);
       } else {
         pTaskInfo->storageAPI.tsdReader.tsdSetQueryTableList(pScanBaseInfo->dataReader, &keyInfo, 1);
         pTaskInfo->storageAPI.tsdReader.tsdReaderResetStatus(pScanBaseInfo->dataReader, &pScanBaseInfo->cond);
         qDebug("tsdb reader offset seek snapshot to uid:%" PRId64 " ts %" PRId64 "  table index:%d numOfTable:%d, %s",
-               uid, pScanBaseInfo->cond.twindows.skey, pScanInfo->tableEndIndex, numOfTables, id);
+               uid, pScanBaseInfo->cond.twindows.skey, pScanInfo->currentTable, numOfTables, id);
       }
 
       // restore the key value
diff --git a/source/libs/executor/src/projectoperator.c b/source/libs/executor/src/projectoperator.c
index d965f16862..cc83ecd84e 100644
--- a/source/libs/executor/src/projectoperator.c
+++ b/source/libs/executor/src/projectoperator.c
@@ -27,6 +27,7 @@ typedef struct SProjectOperatorInfo {
   SLimitInfo     limitInfo;
   bool           mergeDataBlocks;
   SSDataBlock*   pFinalRes;
+  bool           inputIgnoreGroup;
 } SProjectOperatorInfo;
 
 typedef struct SIndefOperatorInfo {
@@ -109,7 +110,8 @@ SOperatorInfo* createProjectOperatorInfo(SOperatorInfo* downstream, SProjectPhys
   pInfo->pFinalRes = createOneDataBlock(pResBlock, false);
   pInfo->binfo.inputTsOrder = pProjPhyNode->node.inputTsOrder;
   pInfo->binfo.outputTsOrder = pProjPhyNode->node.outputTsOrder;
-
+  pInfo->inputIgnoreGroup = pProjPhyNode->inputIgnoreGroup;
+  
   if (pTaskInfo->execModel == OPTR_EXEC_MODEL_STREAM || pTaskInfo->execModel == OPTR_EXEC_MODEL_QUEUE) {
     pInfo->mergeDataBlocks = false;
   } else {
@@ -300,6 +302,10 @@ SSDataBlock* doProjectOperation(SOperatorInfo* pOperator) {
         return pBlock;
       }
 
+      if (pProjectInfo->inputIgnoreGroup) {
+        pBlock->info.id.groupId = 0;
+      }
+
       int32_t status = discardGroupDataBlock(pBlock, pLimitInfo);
       if (status == PROJECT_RETRIEVE_CONTINUE) {
         continue;
diff --git a/source/libs/executor/src/scanoperator.c b/source/libs/executor/src/scanoperator.c
index 3ed5128858..09f4f6ac3c 100644
--- a/source/libs/executor/src/scanoperator.c
+++ b/source/libs/executor/src/scanoperator.c
@@ -657,33 +657,17 @@ void setTbNameColData(const SSDataBlock* pBlock, SColumnInfoData* pColInfoData,
 
 
 static void initNextGroupScan(STableScanInfo* pInfo, STableKeyInfo** pKeyInfo, int32_t* size) {
-  pInfo->tableStartIndex = pInfo->tableEndIndex + 1;
+  tableListGetGroupList(pInfo->base.pTableListInfo, pInfo->currentGroupId, pKeyInfo, size);
 
-  STableListInfo* pTableListInfo = pInfo->base.pTableListInfo;
-  int32_t numOfTables = tableListGetSize(pTableListInfo);
-  STableKeyInfo* pStart = (STableKeyInfo*)tableListGetInfo(pTableListInfo, pInfo->tableStartIndex);
+  pInfo->tableStartIndex = TARRAY_ELEM_IDX(pInfo->base.pTableListInfo->pTableList, *pKeyInfo);
 
-  if (pTableListInfo->oneTableForEachGroup) {
-    pInfo->tableEndIndex = pInfo->tableStartIndex;
-  } else if (pTableListInfo->groupOffset) {
-    pInfo->currentGroupIndex++;
-    if (pInfo->currentGroupIndex + 1 < pTableListInfo->numOfOuputGroups) {
-      pInfo->tableEndIndex = pTableListInfo->groupOffset[pInfo->currentGroupIndex + 1] - 1;
-    } else {
-      pInfo->tableEndIndex = numOfTables - 1;
-    }
-  } else {
-    pInfo->tableEndIndex = numOfTables - 1;
-  }
+  pInfo->tableEndIndex = (pInfo->tableStartIndex + (*size) - 1);
 
   if (!pInfo->needCountEmptyTable) {
     pInfo->countState = TABLE_COUNT_STATE_END;
   } else {
     pInfo->countState = TABLE_COUNT_STATE_SCAN;
   }
-
-  *pKeyInfo = pStart;
-  *size = pInfo->tableEndIndex - pInfo->tableStartIndex + 1;
 }
 
 void markGroupProcessed(STableScanInfo* pInfo, uint64_t groupId) {
@@ -939,7 +923,7 @@ static SSDataBlock* startNextGroupScan(SOperatorInfo* pOperator) {
   SExecTaskInfo*  pTaskInfo = pOperator->pTaskInfo;
   SStorageAPI*    pAPI = &pTaskInfo->storageAPI;
   int32_t numOfTables = tableListGetSize(pInfo->base.pTableListInfo);
-  if (pInfo->tableEndIndex + 1 >= numOfTables) {
+  if ((++pInfo->currentGroupId) >= tableListGetOutputGroups(pInfo->base.pTableListInfo)) {
     setOperatorCompleted(pOperator);
     if (pOperator->dynamicTask) {
       taosArrayClear(pInfo->base.pTableListInfo->pTableList);
@@ -978,13 +962,14 @@ static SSDataBlock* groupSeqTableScan(SOperatorInfo* pOperator) {
   int32_t        num = 0;
   STableKeyInfo* pList = NULL;
 
-  if (pInfo->tableEndIndex == -1) {
+  if (pInfo->currentGroupId == -1) {
     int32_t numOfTables = tableListGetSize(pInfo->base.pTableListInfo);
-    if (pInfo->tableEndIndex + 1 == numOfTables) {
+    if ((++pInfo->currentGroupId) >= tableListGetOutputGroups(pInfo->base.pTableListInfo)) {
       setOperatorCompleted(pOperator);
       return NULL;
     }
-  
+
+
     initNextGroupScan(pInfo, &pList, &num);
     ASSERT(pInfo->base.dataReader == NULL);
   
@@ -1034,7 +1019,7 @@ static SSDataBlock* doTableScan(SOperatorInfo* pOperator) {
       T_LONG_JMP(pTaskInfo->env, code);
     }
     if (pOperator->status == OP_EXEC_DONE) {
-      pInfo->tableEndIndex = -1;
+      pInfo->currentGroupId = -1;
       pOperator->status = OP_OPENED;
       SSDataBlock* result = NULL;
       while (true) {
@@ -1059,23 +1044,23 @@ static SSDataBlock* doTableScan(SOperatorInfo* pOperator) {
       }
 
       // if no data, switch to next table and continue scan
-      pInfo->tableEndIndex++;
+      pInfo->currentTable++;
 
       taosRLockLatch(&pTaskInfo->lock);
       numOfTables = tableListGetSize(pInfo->base.pTableListInfo);
 
-      if (pInfo->tableEndIndex >= numOfTables) {
+      if (pInfo->currentTable >= numOfTables) {
         qDebug("all table checked in table list, total:%d, return NULL, %s", numOfTables, GET_TASKID(pTaskInfo));
         taosRUnLockLatch(&pTaskInfo->lock);
         return NULL;
       }
 
-      tInfo = *(STableKeyInfo*)tableListGetInfo(pInfo->base.pTableListInfo, pInfo->tableEndIndex);
+      tInfo = *(STableKeyInfo*)tableListGetInfo(pInfo->base.pTableListInfo, pInfo->currentTable);
       taosRUnLockLatch(&pTaskInfo->lock);
 
       pAPI->tsdReader.tsdSetQueryTableList(pInfo->base.dataReader, &tInfo, 1);
       qDebug("set uid:%" PRIu64 " into scanner, total tables:%d, index:%d/%d %s", tInfo.uid, numOfTables,
-             pInfo->tableEndIndex, numOfTables, GET_TASKID(pTaskInfo));
+             pInfo->currentTable, numOfTables, GET_TASKID(pTaskInfo));
 
       pAPI->tsdReader.tsdReaderResetStatus(pInfo->base.dataReader, &pInfo->base.cond);
       pInfo->scanTimes = 0;
@@ -1167,9 +1152,10 @@ SOperatorInfo* createTableScanOperatorInfo(STableScanPhysiNode* pTableScanNode,
   if (code != TSDB_CODE_SUCCESS) {
     goto _error;
   }
+  
+  pInfo->currentGroupId = -1;
 
   pInfo->tableEndIndex = -1;
-  pInfo->currentGroupIndex = -1;
   pInfo->assignBlockUid = pTableScanNode->assignBlockUid;
   pInfo->hasGroupByTag = pTableScanNode->pGroupTags ? true : false;
 
@@ -1264,6 +1250,7 @@ void resetTableScanInfo(STableScanInfo* pTableScanInfo, STimeWindow* pWin, uint6
   pTableScanInfo->base.cond.startVersion = 0;
   pTableScanInfo->base.cond.endVersion = ver;
   pTableScanInfo->scanTimes = 0;
+  pTableScanInfo->currentGroupId = -1;
   pTableScanInfo->tableEndIndex = -1;
   pTableScanInfo->base.readerAPI.tsdReaderClose(pTableScanInfo->base.dataReader);
   pTableScanInfo->base.dataReader = NULL;
@@ -2167,7 +2154,7 @@ static SSDataBlock* doStreamScan(SOperatorInfo* pOperator) {
     pInfo->pTableScanOp->status = OP_OPENED;
 
     pTSInfo->scanTimes = 0;
-    pTSInfo->tableEndIndex = -1;
+    pTSInfo->currentGroupId = -1;
   }
 
   if (pStreamInfo->recoverStep == STREAM_RECOVER_STEP__SCAN1) {
diff --git a/source/libs/function/inc/fnLog.h b/source/libs/function/inc/fnLog.h
index 9658b6b782..150d145f50 100644
--- a/source/libs/function/inc/fnLog.h
+++ b/source/libs/function/inc/fnLog.h
@@ -1,6 +1,17 @@
-//
-// Created by slzhou on 22-4-20.
-//
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #ifndef TDENGINE_FNLOG_H
 #define TDENGINE_FNLOG_H
diff --git a/source/libs/function/src/builtins.c b/source/libs/function/src/builtins.c
index 5424a5c704..6f5b28f366 100644
--- a/source/libs/function/src/builtins.c
+++ b/source/libs/function/src/builtins.c
@@ -952,7 +952,7 @@ static int32_t translateLeastSQR(SFunctionNode* pFunc, char* pErrBuf, int32_t le
     }
   }
 
-  pFunc->node.resType = (SDataType){.bytes = 64, .type = TSDB_DATA_TYPE_BINARY};
+  pFunc->node.resType = (SDataType){.bytes = LEASTSQUARES_BUFF_LENGTH, .type = TSDB_DATA_TYPE_BINARY};
   return TSDB_CODE_SUCCESS;
 }
 
diff --git a/source/libs/function/src/builtinsimpl.c b/source/libs/function/src/builtinsimpl.c
index 1e71954278..000f634fe5 100644
--- a/source/libs/function/src/builtinsimpl.c
+++ b/source/libs/function/src/builtinsimpl.c
@@ -1576,9 +1576,19 @@ int32_t leastSQRFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
 
   param12 /= param[1][1];
 
-  char   buf[512] = {0};
+  char buf[LEASTSQUARES_BUFF_LENGTH] = {0};
+  char slopBuf[64] = {0};
+  char interceptBuf[64] = {0};
+  int  n = snprintf(slopBuf, 64, "%.6lf", param02);
+  if (n > LEASTSQUARES_DOUBLE_ITEM_LENGTH) {
+    snprintf(slopBuf, 64, "%." DOUBLE_PRECISION_DIGITS, param02);
+  }
+  n = snprintf(interceptBuf, 64, "%.6lf", param12);
+  if (n > LEASTSQUARES_DOUBLE_ITEM_LENGTH) {
+    snprintf(interceptBuf, 64, "%." DOUBLE_PRECISION_DIGITS, param12);
+  }
   size_t len =
-      snprintf(varDataVal(buf), sizeof(buf) - VARSTR_HEADER_SIZE, "{slop:%.6lf, intercept:%.6lf}", param02, param12);
+      snprintf(varDataVal(buf), sizeof(buf) - VARSTR_HEADER_SIZE, "{slop:%s, intercept:%s}", slopBuf, interceptBuf);
   varDataSetLen(buf, len);
 
   colDataSetVal(pCol, currentRow, buf, pResInfo->isNullRes);
diff --git a/source/libs/nodes/src/nodesCloneFuncs.c b/source/libs/nodes/src/nodesCloneFuncs.c
index c090cb4b63..bc9839792c 100644
--- a/source/libs/nodes/src/nodesCloneFuncs.c
+++ b/source/libs/nodes/src/nodesCloneFuncs.c
@@ -486,6 +486,7 @@ static int32_t logicProjectCopy(const SProjectLogicNode* pSrc, SProjectLogicNode
   CLONE_NODE_LIST_FIELD(pProjections);
   COPY_CHAR_ARRAY_FIELD(stmtName);
   COPY_SCALAR_FIELD(ignoreGroupId);
+  COPY_SCALAR_FIELD(inputIgnoreGroup);
   return TSDB_CODE_SUCCESS;
 }
 
@@ -728,6 +729,15 @@ static int32_t physiPartitionCopy(const SPartitionPhysiNode* pSrc, SPartitionPhy
   return TSDB_CODE_SUCCESS;
 }
 
+static int32_t physiProjectCopy(const SProjectPhysiNode* pSrc, SProjectPhysiNode* pDst) {
+  COPY_BASE_OBJECT_FIELD(node, physiNodeCopy);
+  CLONE_NODE_LIST_FIELD(pProjections);
+  COPY_SCALAR_FIELD(mergeDataBlock);
+  COPY_SCALAR_FIELD(ignoreGroupId);
+  COPY_SCALAR_FIELD(inputIgnoreGroup);
+  return TSDB_CODE_SUCCESS;
+}
+
 static int32_t dataBlockDescCopy(const SDataBlockDescNode* pSrc, SDataBlockDescNode* pDst) {
   COPY_SCALAR_FIELD(dataBlockId);
   CLONE_NODE_LIST_FIELD(pSlots);
@@ -959,6 +969,9 @@ SNode* nodesCloneNode(const SNode* pNode) {
     case QUERY_NODE_PHYSICAL_PLAN_STREAM_PARTITION:
       code = physiPartitionCopy((const SPartitionPhysiNode*)pNode, (SPartitionPhysiNode*)pDst);
       break;
+    case QUERY_NODE_PHYSICAL_PLAN_PROJECT:
+      code = physiProjectCopy((const SProjectPhysiNode*)pNode, (SProjectPhysiNode*)pDst);
+      break;
     default:
       break;
   }
diff --git a/source/libs/nodes/src/nodesCodeFuncs.c b/source/libs/nodes/src/nodesCodeFuncs.c
index 6696aab4c1..d36a1bd6b9 100644
--- a/source/libs/nodes/src/nodesCodeFuncs.c
+++ b/source/libs/nodes/src/nodesCodeFuncs.c
@@ -784,6 +784,7 @@ static int32_t jsonToLogicScanNode(const SJson* pJson, void* pObj) {
 
 static const char* jkProjectLogicPlanProjections = "Projections";
 static const char* jkProjectLogicPlanIgnoreGroupId = "IgnoreGroupId";
+static const char* jkProjectLogicPlanInputIgnoreGroup= "InputIgnoreGroup";
 
 static int32_t logicProjectNodeToJson(const void* pObj, SJson* pJson) {
   const SProjectLogicNode* pNode = (const SProjectLogicNode*)pObj;
@@ -795,6 +796,9 @@ static int32_t logicProjectNodeToJson(const void* pObj, SJson* pJson) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonAddBoolToObject(pJson, jkProjectLogicPlanIgnoreGroupId, pNode->ignoreGroupId);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddBoolToObject(pJson, jkProjectLogicPlanInputIgnoreGroup, pNode->inputIgnoreGroup);
+  }
 
   return code;
 }
@@ -809,7 +813,9 @@ static int32_t jsonToLogicProjectNode(const SJson* pJson, void* pObj) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonGetBoolValue(pJson, jkProjectLogicPlanIgnoreGroupId, &pNode->ignoreGroupId);
   }
-
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetBoolValue(pJson, jkProjectLogicPlanInputIgnoreGroup, &pNode->inputIgnoreGroup);
+  }
   return code;
 }
 
@@ -2067,6 +2073,7 @@ static int32_t jsonToPhysiSysTableScanNode(const SJson* pJson, void* pObj) {
 static const char* jkProjectPhysiPlanProjections = "Projections";
 static const char* jkProjectPhysiPlanMergeDataBlock = "MergeDataBlock";
 static const char* jkProjectPhysiPlanIgnoreGroupId = "IgnoreGroupId";
+static const char* jkProjectPhysiPlanInputIgnoreGroup = "InputIgnoreGroup";
 
 static int32_t physiProjectNodeToJson(const void* pObj, SJson* pJson) {
   const SProjectPhysiNode* pNode = (const SProjectPhysiNode*)pObj;
@@ -2081,7 +2088,9 @@ static int32_t physiProjectNodeToJson(const void* pObj, SJson* pJson) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonAddBoolToObject(pJson, jkProjectPhysiPlanIgnoreGroupId, pNode->ignoreGroupId);
   }
-
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddBoolToObject(pJson, jkProjectPhysiPlanInputIgnoreGroup, pNode->inputIgnoreGroup);
+  }
   return code;
 }
 
@@ -2098,7 +2107,9 @@ static int32_t jsonToPhysiProjectNode(const SJson* pJson, void* pObj) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonGetBoolValue(pJson, jkProjectPhysiPlanIgnoreGroupId, &pNode->ignoreGroupId);
   }
-
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetBoolValue(pJson, jkProjectPhysiPlanInputIgnoreGroup, &pNode->inputIgnoreGroup);
+  }
   return code;
 }
 
diff --git a/source/libs/nodes/src/nodesMsgFuncs.c b/source/libs/nodes/src/nodesMsgFuncs.c
index 3cff7c76aa..3fd219b8d8 100644
--- a/source/libs/nodes/src/nodesMsgFuncs.c
+++ b/source/libs/nodes/src/nodesMsgFuncs.c
@@ -2367,7 +2367,8 @@ enum {
   PHY_PROJECT_CODE_BASE_NODE = 1,
   PHY_PROJECT_CODE_PROJECTIONS,
   PHY_PROJECT_CODE_MERGE_DATA_BLOCK,
-  PHY_PROJECT_CODE_IGNORE_GROUP_ID
+  PHY_PROJECT_CODE_IGNORE_GROUP_ID,
+  PHY_PROJECT_CODE_INPUT_IGNORE_GROUP
 };
 
 static int32_t physiProjectNodeToMsg(const void* pObj, STlvEncoder* pEncoder) {
@@ -2383,6 +2384,9 @@ static int32_t physiProjectNodeToMsg(const void* pObj, STlvEncoder* pEncoder) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tlvEncodeBool(pEncoder, PHY_PROJECT_CODE_IGNORE_GROUP_ID, pNode->ignoreGroupId);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tlvEncodeBool(pEncoder, PHY_PROJECT_CODE_INPUT_IGNORE_GROUP, pNode->inputIgnoreGroup);
+  }
 
   return code;
 }
@@ -2406,6 +2410,9 @@ static int32_t msgToPhysiProjectNode(STlvDecoder* pDecoder, void* pObj) {
       case PHY_PROJECT_CODE_IGNORE_GROUP_ID:
         code = tlvDecodeBool(pTlv, &pNode->ignoreGroupId);
         break;
+      case PHY_PROJECT_CODE_INPUT_IGNORE_GROUP:
+        code = tlvDecodeBool(pTlv, &pNode->inputIgnoreGroup);
+        break;
       default:
         break;
     }
diff --git a/source/libs/parser/src/parTranslater.c b/source/libs/parser/src/parTranslater.c
index 4d7df17545..70e4744644 100644
--- a/source/libs/parser/src/parTranslater.c
+++ b/source/libs/parser/src/parTranslater.c
@@ -1085,21 +1085,31 @@ static EDealRes translateColumnWithoutPrefix(STranslateContext* pCxt, SColumnNod
 static EDealRes translateColumnUseAlias(STranslateContext* pCxt, SColumnNode** pCol, bool* pFound) {
   SNodeList* pProjectionList = getProjectListFromCurrStmt(pCxt->pCurrStmt);
   SNode*     pNode;
+  SNode*     pFoundNode = NULL;
+  *pFound = false;
   FOREACH(pNode, pProjectionList) {
     SExprNode* pExpr = (SExprNode*)pNode;
     if (0 == strcmp((*pCol)->colName, pExpr->userAlias)) {
-      SNode* pNew = nodesCloneNode(pNode);
-        if (NULL == pNew) {
-          pCxt->errCode = TSDB_CODE_OUT_OF_MEMORY;
-          return DEAL_RES_ERROR;
+      if (true == *pFound) {
+        if(nodesEqualNode(pFoundNode, pNode)) {
+          continue;
         }
-        nodesDestroyNode(*(SNode**)pCol);
-        *(SNode**)pCol = (SNode*)pNew;
-        *pFound = true;
-        return DEAL_RES_CONTINUE;
-    }   
+        pCxt->errCode = generateSyntaxErrMsg(&pCxt->msgBuf, TSDB_CODE_PAR_ORDERBY_AMBIGUOUS, (*pCol)->colName);
+        return DEAL_RES_ERROR;
+      }
+      *pFound = true;
+      pFoundNode = pNode;
+    }
+  }
+  if (*pFound) {
+    SNode* pNew = nodesCloneNode(pFoundNode);
+    if (NULL == pNew) {
+      pCxt->errCode = TSDB_CODE_OUT_OF_MEMORY;
+      return DEAL_RES_ERROR;
+    }
+    nodesDestroyNode(*(SNode**)pCol);
+    *(SNode**)pCol = (SNode*)pNew;
   }
-  *pFound = false;
   return DEAL_RES_CONTINUE;
 }
 
@@ -4499,13 +4509,12 @@ typedef struct SReplaceOrderByAliasCxt {
 
 static EDealRes replaceOrderByAliasImpl(SNode** pNode, void* pContext) {
   SReplaceOrderByAliasCxt* pCxt = pContext;
-  SNodeList* pProjectionList = pCxt->pProjectionList;
-  SNode*     pProject = NULL;
+  SNodeList*               pProjectionList = pCxt->pProjectionList;
+  SNode*                   pProject = NULL;
   if (QUERY_NODE_COLUMN == nodeType(*pNode)) {
     FOREACH(pProject, pProjectionList) {
       SExprNode* pExpr = (SExprNode*)pProject;
-      if (0 == strcmp(((SColumnRefNode*)*pNode)->colName, pExpr->userAlias)
-        && nodeType(*pNode) == nodeType(pProject)) {
+      if (0 == strcmp(((SColumnRefNode*)*pNode)->colName, pExpr->userAlias) && nodeType(*pNode) == nodeType(pProject)) {
         SNode* pNew = nodesCloneNode(pProject);
         if (NULL == pNew) {
           pCxt->pTranslateCxt->errCode = TSDB_CODE_OUT_OF_MEMORY;
@@ -4519,14 +4528,14 @@ static EDealRes replaceOrderByAliasImpl(SNode** pNode, void* pContext) {
     }
   } else if (QUERY_NODE_ORDER_BY_EXPR == nodeType(*pNode)) {
     STranslateContext* pTransCxt = pCxt->pTranslateCxt;
-    SNode* pExpr = ((SOrderByExprNode*)*pNode)->pExpr;
-        if (QUERY_NODE_VALUE == nodeType(pExpr)) {
+    SNode*             pExpr = ((SOrderByExprNode*)*pNode)->pExpr;
+    if (QUERY_NODE_VALUE == nodeType(pExpr)) {
       SValueNode* pVal = (SValueNode*)pExpr;
       if (DEAL_RES_ERROR == translateValue(pTransCxt, pVal)) {
         return pTransCxt->errCode;
       }
       int32_t pos = getPositionValue(pVal);
-      if ( 0 < pos && pos <= LIST_LENGTH(pProjectionList)) {
+      if (0 < pos && pos <= LIST_LENGTH(pProjectionList)) {
         SNode* pNew = nodesCloneNode(nodesListGetNode(pProjectionList, pos - 1));
         if (NULL == pNew) {
           pCxt->pTranslateCxt->errCode = TSDB_CODE_OUT_OF_MEMORY;
diff --git a/source/libs/parser/src/parUtil.c b/source/libs/parser/src/parUtil.c
index 26e6111074..dfe33ce55e 100644
--- a/source/libs/parser/src/parUtil.c
+++ b/source/libs/parser/src/parUtil.c
@@ -190,6 +190,8 @@ static char* getSyntaxErrFormat(int32_t errCode) {
       return "invalid ip range";
     case TSDB_CODE_OUT_OF_MEMORY:
       return "Out of memory";
+    case TSDB_CODE_PAR_ORDERBY_AMBIGUOUS:
+      return "ORDER BY \"%s\" is ambiguous";
     default:
       return "Unknown error";
   }
diff --git a/source/libs/planner/src/planOptimizer.c b/source/libs/planner/src/planOptimizer.c
index 754d502a33..dfb9343cc8 100644
--- a/source/libs/planner/src/planOptimizer.c
+++ b/source/libs/planner/src/planOptimizer.c
@@ -3122,6 +3122,7 @@ static bool mergeProjectsMayBeOptimized(SLogicNode* pNode) {
       NULL != pChild->pConditions || NULL != pChild->pLimit || NULL != pChild->pSlimit) {
     return false;
   }
+
   return true;
 }
 
@@ -3160,7 +3161,9 @@ static EDealRes mergeProjectionsExpr(SNode** pNode, void* pContext) {
 
 static int32_t mergeProjectsOptimizeImpl(SOptimizeContext* pCxt, SLogicSubplan* pLogicSubplan, SLogicNode* pSelfNode) {
   SLogicNode* pChild = (SLogicNode*)nodesListGetNode(pSelfNode->pChildren, 0);
-
+  if (((SProjectLogicNode*)pChild)->ignoreGroupId) {
+    ((SProjectLogicNode*)pSelfNode)->inputIgnoreGroup = true;
+  }
   SMergeProjectionsContext cxt = {.pChildProj = (SProjectLogicNode*)pChild, .errCode = TSDB_CODE_SUCCESS};
   nodesRewriteExprs(((SProjectLogicNode*)pSelfNode)->pProjections, mergeProjectionsExpr, &cxt);
   int32_t code = cxt.errCode;
@@ -3325,7 +3328,11 @@ static bool pushDownLimitTo(SLogicNode* pNodeWithLimit, SLogicNode* pNodeLimitPu
     }
     case QUERY_NODE_LOGIC_PLAN_SCAN:
       if (nodeType(pNodeWithLimit) == QUERY_NODE_LOGIC_PLAN_PROJECT && pNodeWithLimit->pLimit) {
-        swapLimit(pNodeWithLimit, pNodeLimitPushTo);
+        if (((SProjectLogicNode*)pNodeWithLimit)->inputIgnoreGroup) {
+          cloneLimit(pNodeWithLimit, pNodeLimitPushTo, CLONE_LIMIT);
+        } else {
+          swapLimit(pNodeWithLimit, pNodeLimitPushTo);
+        }
         return true;
       }
     default:
diff --git a/source/libs/planner/src/planPhysiCreater.c b/source/libs/planner/src/planPhysiCreater.c
index 21c698fda5..21c637116f 100644
--- a/source/libs/planner/src/planPhysiCreater.c
+++ b/source/libs/planner/src/planPhysiCreater.c
@@ -1459,6 +1459,7 @@ static int32_t createProjectPhysiNode(SPhysiPlanContext* pCxt, SNodeList* pChild
 
   pProject->mergeDataBlock = projectCanMergeDataBlock(pProjectLogicNode);
   pProject->ignoreGroupId = pProjectLogicNode->ignoreGroupId;
+  pProject->inputIgnoreGroup = pProjectLogicNode->inputIgnoreGroup;
 
   int32_t code = TSDB_CODE_SUCCESS;
   if (0 == LIST_LENGTH(pChildren)) {
diff --git a/source/libs/planner/src/planSpliter.c b/source/libs/planner/src/planSpliter.c
index ad0031f815..f2258a1d7e 100644
--- a/source/libs/planner/src/planSpliter.c
+++ b/source/libs/planner/src/planSpliter.c
@@ -1164,8 +1164,10 @@ static int32_t stbSplSplitSortNode(SSplitContext* pCxt, SStableSplitInfo* pInfo)
 
 static int32_t stbSplGetSplitNodeForScan(SStableSplitInfo* pInfo, SLogicNode** pSplitNode) {
   *pSplitNode = pInfo->pSplitNode;
-  if (NULL != pInfo->pSplitNode->pParent && QUERY_NODE_LOGIC_PLAN_PROJECT == nodeType(pInfo->pSplitNode->pParent) &&
-      NULL == pInfo->pSplitNode->pParent->pLimit && NULL == pInfo->pSplitNode->pParent->pSlimit) {
+  if (NULL != pInfo->pSplitNode->pParent && 
+      QUERY_NODE_LOGIC_PLAN_PROJECT == nodeType(pInfo->pSplitNode->pParent) &&
+      NULL == pInfo->pSplitNode->pParent->pLimit && NULL == pInfo->pSplitNode->pParent->pSlimit && 
+      !((SProjectLogicNode*)pInfo->pSplitNode->pParent)->inputIgnoreGroup) {
     *pSplitNode = pInfo->pSplitNode->pParent;
     if (NULL != pInfo->pSplitNode->pLimit) {
       (*pSplitNode)->pLimit = nodesCloneNode(pInfo->pSplitNode->pLimit);
diff --git a/source/libs/scalar/src/sclfunc.c b/source/libs/scalar/src/sclfunc.c
index e713043b80..2e44c75c17 100644
--- a/source/libs/scalar/src/sclfunc.c
+++ b/source/libs/scalar/src/sclfunc.c
@@ -2427,9 +2427,19 @@ int32_t leastSQRScalarFunction(SScalarParam *pInput, int32_t inputNum, SScalarPa
 
     matrix12 /= matrix[1][1];
 
-    char   buf[64] = {0};
-    size_t len = snprintf(varDataVal(buf), sizeof(buf) - VARSTR_HEADER_SIZE, "{slop:%.6lf, intercept:%.6lf}", matrix02,
-                          matrix12);
+    char buf[LEASTSQUARES_BUFF_LENGTH] = {0};
+    char slopBuf[64] = {0};
+    char interceptBuf[64] = {0};
+    int  n = snprintf(slopBuf, 64, "%.6lf", matrix02);
+    if (n > LEASTSQUARES_DOUBLE_ITEM_LENGTH) {
+      snprintf(slopBuf, 64, "%." DOUBLE_PRECISION_DIGITS, matrix02);
+    }
+    n = snprintf(interceptBuf, 64, "%.6lf", matrix12);
+    if (n > LEASTSQUARES_DOUBLE_ITEM_LENGTH) {
+      snprintf(interceptBuf, 64, "%." DOUBLE_PRECISION_DIGITS, matrix12);
+    }
+    size_t len =
+        snprintf(varDataVal(buf), sizeof(buf) - VARSTR_HEADER_SIZE, "{slop:%s, intercept:%s}", slopBuf, interceptBuf);
     varDataSetLen(buf, len);
     colDataSetVal(pOutputData, 0, buf, false);
   }
diff --git a/source/libs/stream/inc/streamInt.h b/source/libs/stream/inc/streamInt.h
index 1e4b8996b6..bd5bddcece 100644
--- a/source/libs/stream/inc/streamInt.h
+++ b/source/libs/stream/inc/streamInt.h
@@ -48,8 +48,8 @@ extern "C" {
 #define stError(...) do { if (stDebugFlag & DEBUG_ERROR) { taosPrintLog("STM ERROR ", DEBUG_ERROR, 255, __VA_ARGS__); }}     while(0)
 #define stWarn(...)  do { if (stDebugFlag & DEBUG_WARN)  { taosPrintLog("STM WARN ", DEBUG_WARN, 255, __VA_ARGS__); }}       while(0)
 #define stInfo(...)  do { if (stDebugFlag & DEBUG_INFO)  { taosPrintLog("STM ", DEBUG_INFO, 255, __VA_ARGS__); }}            while(0)
-#define stDebug(...) do { if (stDebugFlag & DEBUG_DEBUG) { taosPrintLog("STM ", DEBUG_DEBUG, tqDebugFlag, __VA_ARGS__); }} while(0)
-#define stTrace(...) do { if (stDebugFlag & DEBUG_TRACE) { taosPrintLog("STM ", DEBUG_TRACE, tqDebugFlag, __VA_ARGS__); }} while(0)
+#define stDebug(...) do { if (stDebugFlag & DEBUG_DEBUG) { taosPrintLog("STM ", DEBUG_DEBUG, stDebugFlag, __VA_ARGS__); }} while(0)
+#define stTrace(...) do { if (stDebugFlag & DEBUG_TRACE) { taosPrintLog("STM ", DEBUG_TRACE, stDebugFlag, __VA_ARGS__); }} while(0)
 // clang-format on
 
 typedef struct {
diff --git a/source/libs/stream/src/stream.c b/source/libs/stream/src/stream.c
index 75af5a9fc5..c3373c1e7f 100644
--- a/source/libs/stream/src/stream.c
+++ b/source/libs/stream/src/stream.c
@@ -35,6 +35,10 @@ void streamTimerCleanUp() {
   streamTimer = NULL;
 }
 
+tmr_h streamTimerGetInstance() {
+  return streamTimer;
+}
+
 char* createStreamTaskIdStr(int64_t streamId, int32_t taskId) {
   char buf[128] = {0};
   sprintf(buf, "0x%" PRIx64 "-0x%x", streamId, taskId);
diff --git a/source/libs/stream/src/streamBackendRocksdb.c b/source/libs/stream/src/streamBackendRocksdb.c
index c8f944071f..bcf289a019 100644
--- a/source/libs/stream/src/streamBackendRocksdb.c
+++ b/source/libs/stream/src/streamBackendRocksdb.c
@@ -500,34 +500,27 @@ int32_t backendCopyFiles(char* src, char* dst) {
   // return 0;
 }
 int32_t rebuildFromLocalChkp(char* key, char* chkpPath, int64_t chkpId, char* defaultPath) {
-  int32_t code = -1;
-  int32_t len = strlen(defaultPath) + 32;
-  char*   tmp = taosMemoryCalloc(1, len);
-  sprintf(tmp, "%s%s", defaultPath, "_tmp");
-
-  if (taosIsDir(tmp)) taosRemoveDir(tmp);
-  if (taosIsDir(defaultPath)) taosRenameFile(defaultPath, tmp);
-
-  if (taosIsDir(chkpPath) && isValidCheckpoint(chkpPath)) {
-    if (taosIsDir(tmp)) {
-      taosRemoveDir(tmp);
-    }
+  int32_t code = 0;
+  if (taosIsDir(defaultPath)) {
+    taosRemoveDir(defaultPath);
     taosMkDir(defaultPath);
+
+    stInfo("succ to clear stream backend %s", defaultPath);
+  }
+  if (taosIsDir(chkpPath) && isValidCheckpoint(chkpPath)) {
     code = backendCopyFiles(chkpPath, defaultPath);
     if (code != 0) {
-      stError("failed to restart stream backend from %s, reason: %s", chkpPath, tstrerror(TAOS_SYSTEM_ERROR(errno)));
+      taosRemoveDir(defaultPath);
+      taosMkDir(defaultPath);
+
+      stError("failed to restart stream backend from %s, reason: %s, start to restart from empty path: %s", chkpPath,
+              tstrerror(TAOS_SYSTEM_ERROR(errno)), defaultPath);
+      code = 0;
     } else {
       stInfo("start to restart stream backend at checkpoint path: %s", chkpPath);
     }
   }
-  if (code != 0) {
-    if (taosIsDir(defaultPath)) taosRemoveDir(defaultPath);
-    if (taosIsDir(tmp)) taosRenameFile(tmp, defaultPath);
-  } else {
-    taosRemoveDir(tmp);
-  }
 
-  taosMemoryFree(tmp);
   return code;
 }
 
diff --git a/source/libs/stream/src/streamCheckpoint.c b/source/libs/stream/src/streamCheckpoint.c
index 006202fdd1..eb50efadeb 100644
--- a/source/libs/stream/src/streamCheckpoint.c
+++ b/source/libs/stream/src/streamCheckpoint.c
@@ -360,6 +360,8 @@ int32_t streamSaveTaskCheckpointInfo(SStreamTask* p, int64_t checkpointId) {
 
 void streamTaskSetCheckpointFailedId(SStreamTask* pTask) {
   pTask->chkInfo.failedId = pTask->chkInfo.checkpointingId;
+  stDebug("s-task:%s mark the checkpointId:%" PRId64 " (transId:%d) failed", pTask->id.idStr,
+          pTask->chkInfo.checkpointingId, pTask->chkInfo.transId);
 }
 
 int32_t getChkpMeta(char* id, char* path, SArray* list) {
diff --git a/source/libs/stream/src/streamMeta.c b/source/libs/stream/src/streamMeta.c
index 6bec79065e..6e35e39a0a 100644
--- a/source/libs/stream/src/streamMeta.c
+++ b/source/libs/stream/src/streamMeta.c
@@ -960,7 +960,7 @@ int32_t tEncodeStreamHbMsg(SEncoder* pEncoder, const SStreamHbMsg* pReq) {
     if (tEncodeI64(pEncoder, ps->processedVer) < 0) return -1;
     if (tEncodeI64(pEncoder, ps->verStart) < 0) return -1;
     if (tEncodeI64(pEncoder, ps->verEnd) < 0) return -1;
-    if (tEncodeI64(pEncoder, ps->activeCheckpointId) < 0) return -1;
+    if (tEncodeI64(pEncoder, ps->checkpointId) < 0) return -1;
     if (tEncodeI8(pEncoder, ps->checkpointFailed) < 0) return -1;
     if (tEncodeI32(pEncoder, ps->chkpointTransId) < 0) return -1;
   }
@@ -999,8 +999,8 @@ int32_t tDecodeStreamHbMsg(SDecoder* pDecoder, SStreamHbMsg* pReq) {
     if (tDecodeI64(pDecoder, &entry.processedVer) < 0) return -1;
     if (tDecodeI64(pDecoder, &entry.verStart) < 0) return -1;
     if (tDecodeI64(pDecoder, &entry.verEnd) < 0) return -1;
-    if (tDecodeI64(pDecoder, &entry.activeCheckpointId) < 0) return -1;
-    if (tDecodeI8(pDecoder, (int8_t*)&entry.checkpointFailed) < 0) return -1;
+    if (tDecodeI64(pDecoder, &entry.checkpointId) < 0) return -1;
+    if (tDecodeI8(pDecoder, &entry.checkpointFailed) < 0) return -1;
     if (tDecodeI32(pDecoder, &entry.chkpointTransId) < 0) return -1;
 
     entry.id.taskId = taskId;
@@ -1113,8 +1113,8 @@ static int32_t metaHeartbeatToMnodeImpl(SStreamMeta* pMeta) {
     }
 
     if ((*pTask)->chkInfo.checkpointingId != 0) {
-      entry.checkpointFailed = ((*pTask)->chkInfo.failedId >= (*pTask)->chkInfo.checkpointingId);
-      entry.activeCheckpointId = (*pTask)->chkInfo.checkpointingId;
+      entry.checkpointFailed = ((*pTask)->chkInfo.failedId >= (*pTask)->chkInfo.checkpointingId)? 1:0;
+      entry.checkpointId = (*pTask)->chkInfo.checkpointingId;
       entry.chkpointTransId = (*pTask)->chkInfo.transId;
 
       if (entry.checkpointFailed) {
@@ -1373,7 +1373,6 @@ SArray* streamMetaSendMsgBeforeCloseTasks(SStreamMeta* pMeta) {
     SStreamTaskState* pState = streamTaskGetStatus(pTask);
     if (pState->state == TASK_STATUS__CK) {
       streamTaskSetCheckpointFailedId(pTask);
-      stDebug("s-task:%s mark the checkpoint:%"PRId64" failed", pTask->id.idStr, pTask->chkInfo.checkpointingId);
     } else {
       stDebug("s-task:%s status:%s not reset the checkpoint", pTask->id.idStr, pState->name);
     }
@@ -1411,31 +1410,43 @@ void streamMetaUpdateStageRole(SStreamMeta* pMeta, int64_t stage, bool isLeader)
   }
 }
 
+static SArray* prepareBeforeStartTasks(SStreamMeta* pMeta) {
+  streamMetaWLock(pMeta);
+
+  SArray* pTaskList = taosArrayDup(pMeta->pTaskList, NULL);
+  taosHashClear(pMeta->startInfo.pReadyTaskSet);
+  taosHashClear(pMeta->startInfo.pFailedTaskSet);
+  pMeta->startInfo.startTs = taosGetTimestampMs();
+
+  streamMetaResetTaskStatus(pMeta);
+  streamMetaWUnLock(pMeta);
+
+  return pTaskList;
+}
+
 int32_t streamMetaStartAllTasks(SStreamMeta* pMeta) {
   int32_t code = TSDB_CODE_SUCCESS;
   int32_t vgId = pMeta->vgId;
 
   int32_t numOfTasks = taosArrayGetSize(pMeta->pTaskList);
   stInfo("vgId:%d start to check all %d stream task(s) downstream status", vgId, numOfTasks);
+
   if (numOfTasks == 0) {
     stInfo("vgId:%d start tasks completed", pMeta->vgId);
     return TSDB_CODE_SUCCESS;
   }
 
-  SArray* pTaskList = NULL;
-  streamMetaWLock(pMeta);
-  pTaskList = taosArrayDup(pMeta->pTaskList, NULL);
-  taosHashClear(pMeta->startInfo.pReadyTaskSet);
-  taosHashClear(pMeta->startInfo.pFailedTaskSet);
-  pMeta->startInfo.startTs = taosGetTimestampMs();
-  streamMetaWUnLock(pMeta);
-
-  // broadcast the check downstream tasks msg
   int64_t now = taosGetTimestampMs();
 
+  SArray* pTaskList = prepareBeforeStartTasks(pMeta);
+  numOfTasks = taosArrayGetSize(pTaskList);
+
+  // broadcast the check downstream tasks msg
   for (int32_t i = 0; i < numOfTasks; ++i) {
     SStreamTaskId* pTaskId = taosArrayGet(pTaskList, i);
 
+    // todo: may be we should find the related fill-history task and set it failed.
+    // todo: use hashTable instead
     SStreamTask* pTask = streamMetaAcquireTask(pMeta, pTaskId->streamId, pTaskId->taskId);
     if (pTask == NULL) {
       stError("vgId:%d failed to acquire task:0x%x during start tasks", pMeta->vgId, pTaskId->taskId);
@@ -1443,8 +1454,6 @@ int32_t streamMetaStartAllTasks(SStreamMeta* pMeta) {
       continue;
     }
 
-    // todo: may be we should find the related fill-history task and set it failed.
-
     // fill-history task can only be launched by related stream tasks.
     STaskExecStatisInfo* pInfo = &pTask->execInfo;
     if (pTask->info.fillHistory == 1) {
@@ -1491,10 +1500,13 @@ int32_t streamMetaStopAllTasks(SStreamMeta* pMeta) {
   int32_t num = taosArrayGetSize(pMeta->pTaskList);
   stDebug("vgId:%d stop all %d stream task(s)", pMeta->vgId, num);
   if (num == 0) {
+    stDebug("vgId:%d stop all %d task(s) completed, elapsed time:0 Sec.", pMeta->vgId, num);
     streamMetaRUnLock(pMeta);
     return TSDB_CODE_SUCCESS;
   }
 
+  int64_t st = taosGetTimestampMs();
+
   // send hb msg to mnode before closing all tasks.
   SArray* pTaskList = streamMetaSendMsgBeforeCloseTasks(pMeta);
   int32_t numOfTasks = taosArrayGetSize(pTaskList);
@@ -1512,6 +1524,9 @@ int32_t streamMetaStopAllTasks(SStreamMeta* pMeta) {
 
   taosArrayDestroy(pTaskList);
 
+  double el = (taosGetTimestampMs() - st) / 1000.0;
+  stDebug("vgId:%d stop all %d task(s) completed, elapsed time:%.2f Sec.", pMeta->vgId, num, el);
+
   streamMetaRUnLock(pMeta);
   return 0;
 }
@@ -1638,4 +1653,23 @@ int32_t streamMetaAddTaskLaunchResult(SStreamMeta* pMeta, int64_t streamId, int3
   }
 
   return TSDB_CODE_SUCCESS;
+}
+
+int32_t streamMetaResetTaskStatus(SStreamMeta* pMeta) {
+  int32_t numOfTasks = taosArrayGetSize(pMeta->pTaskList);
+
+  stDebug("vgId:%d reset all %d stream task(s) status to be uninit", pMeta->vgId, numOfTasks);
+  if (numOfTasks == 0) {
+    return TSDB_CODE_SUCCESS;
+  }
+
+  for (int32_t i = 0; i < numOfTasks; ++i) {
+    SStreamTaskId* pTaskId = taosArrayGet(pMeta->pTaskList, i);
+
+    STaskId       id = {.streamId = pTaskId->streamId, .taskId = pTaskId->taskId};
+    SStreamTask** pTask = taosHashGet(pMeta->pTasksMap, &id, sizeof(id));
+    streamTaskResetStatus(*pTask);
+  }
+
+  return 0;
 }
\ No newline at end of file
diff --git a/source/libs/stream/src/streamSessionState.c b/source/libs/stream/src/streamSessionState.c
index 2cb77c60dc..1f991d309f 100644
--- a/source/libs/stream/src/streamSessionState.c
+++ b/source/libs/stream/src/streamSessionState.c
@@ -90,6 +90,7 @@ SRowBuffPos* createSessionWinBuff(SStreamFileState* pFileState, SSessionKey* pKe
   SRowBuffPos* pNewPos = getNewRowPosForWrite(pFileState);
   memcpy(pNewPos->pKey, pKey, sizeof(SSessionKey));
   pNewPos->needFree = true;
+  pNewPos->beFlushed = true;
   memcpy(pNewPos->pRowBuff, p, *pVLen);
   taosMemoryFree(p);
   return pNewPos;
@@ -217,6 +218,7 @@ int32_t getSessionFlushedBuff(SStreamFileState* pFileState, SSessionKey* pKey, v
   SRowBuffPos* pNewPos = getNewRowPosForWrite(pFileState);
   memcpy(pNewPos->pKey, pKey, sizeof(SSessionKey));
   pNewPos->needFree = true;
+  pNewPos->beFlushed = true;
   void*   pBuff = NULL;
   int32_t code = streamStateSessionGet_rocksdb(getStateFileStore(pFileState), pKey, &pBuff, pVLen);
   if (code != TSDB_CODE_SUCCESS) {
@@ -307,6 +309,7 @@ int32_t allocSessioncWinBuffByNextPosition(SStreamFileState* pFileState, SStream
     }
     pNewPos = getNewRowPosForWrite(pFileState);
     pNewPos->needFree = true;
+    pNewPos->beFlushed = true;
   }
 
 _end:
@@ -482,6 +485,7 @@ int32_t sessionWinStateGetKVByCur(SStreamStateCur* pCur, SSessionKey* pKey, void
       SRowBuffPos* pNewPos = getNewRowPosForWrite(pCur->pStreamFileState);
       memcpy(pNewPos->pKey, pKey, sizeof(SSessionKey));
       pNewPos->needFree = true;
+      pNewPos->beFlushed = true;
       memcpy(pNewPos->pRowBuff, pData, *pVLen);
       (*pVal) = pNewPos;
     }
diff --git a/source/libs/stream/src/streamState.c b/source/libs/stream/src/streamState.c
index 19b7359981..ea20f0e2b1 100644
--- a/source/libs/stream/src/streamState.c
+++ b/source/libs/stream/src/streamState.c
@@ -698,6 +698,7 @@ int32_t streamStateSessionPut(SStreamState* pState, const SSessionKey* key, void
       stDebug("===stream===save skey:%" PRId64 ", ekey:%" PRId64 ", groupId:%" PRIu64 ".code:%d", key->win.skey,
               key->win.ekey, key->groupId, code);
     } else {
+      pos->beFlushed = false;
       code = putSessionWinResultBuff(pState->pFileState, value);
     }
   }
diff --git a/source/libs/stream/src/streamTask.c b/source/libs/stream/src/streamTask.c
index 294c099c20..094068a06e 100644
--- a/source/libs/stream/src/streamTask.c
+++ b/source/libs/stream/src/streamTask.c
@@ -810,7 +810,7 @@ void streamTaskStatusCopy(STaskStatusEntry* pDst, const STaskStatusEntry* pSrc)
   pDst->verEnd = pSrc->verEnd;
   pDst->sinkQuota = pSrc->sinkQuota;
   pDst->sinkDataSize = pSrc->sinkDataSize;
-  pDst->activeCheckpointId = pSrc->activeCheckpointId;
+  pDst->checkpointId = pSrc->checkpointId;
   pDst->checkpointFailed = pSrc->checkpointFailed;
   pDst->chkpointTransId = pSrc->chkpointTransId;
 }
diff --git a/source/libs/sync/src/syncMain.c b/source/libs/sync/src/syncMain.c
index 9352d5662e..ff6401cba8 100644
--- a/source/libs/sync/src/syncMain.c
+++ b/source/libs/sync/src/syncMain.c
@@ -676,7 +676,7 @@ int32_t syncNodePropose(SSyncNode* pSyncNode, SRpcMsg* pMsg, bool isWeak, int64_
   // heartbeat timeout
   if (syncNodeHeartbeatReplyTimeout(pSyncNode)) {
     terrno = TSDB_CODE_SYN_PROPOSE_NOT_READY;
-    sNError(pSyncNode, "failed to sync propose since hearbeat timeout, type:%s, last:%" PRId64 ", cmt:%" PRId64,
+    sNError(pSyncNode, "failed to sync propose since heartbeat timeout, type:%s, last:%" PRId64 ", cmt:%" PRId64,
             TMSG_INFO(pMsg->msgType), syncNodeGetLastIndex(pSyncNode), pSyncNode->commitIndex);
     return -1;
   }
diff --git a/source/libs/sync/src/syncSnapshot.c b/source/libs/sync/src/syncSnapshot.c
index 578e6798e0..d9c8bb21ac 100644
--- a/source/libs/sync/src/syncSnapshot.c
+++ b/source/libs/sync/src/syncSnapshot.c
@@ -345,9 +345,9 @@ int32_t snapshotReSend(SSyncSnapshotSender *pSender) {
 
   for (int32_t seq = pSndBuf->cursor + 1; seq < pSndBuf->end; ++seq) {
     SyncSnapBlock *pBlk = pSndBuf->entries[seq % pSndBuf->size];
-    ASSERT(pBlk && !pBlk->acked);
+    ASSERT(pBlk);
     int64_t nowMs = taosGetTimestampMs();
-    if (nowMs < pBlk->sendTimeMs + SYNC_SNAP_RESEND_MS) {
+    if (pBlk->acked || nowMs < pBlk->sendTimeMs + SYNC_SNAP_RESEND_MS) {
       continue;
     }
     if (syncSnapSendMsg(pSender, pBlk->seq, pBlk->pBlock, pBlk->blockLen, 0) != 0) {
diff --git a/source/util/src/terror.c b/source/util/src/terror.c
index 360689cef3..79b9e9bbed 100644
--- a/source/util/src/terror.c
+++ b/source/util/src/terror.c
@@ -101,8 +101,8 @@ TAOS_DEFINE_ERROR(TSDB_CODE_APP_IS_STARTING,              "Database is starting
 TAOS_DEFINE_ERROR(TSDB_CODE_APP_IS_STOPPING,              "Database is closing down")
 TAOS_DEFINE_ERROR(TSDB_CODE_INVALID_DATA_FMT,             "Invalid data format")
 TAOS_DEFINE_ERROR(TSDB_CODE_INVALID_CFG_VALUE,            "Invalid configuration value")
-TAOS_DEFINE_ERROR(TSDB_CODE_IP_NOT_IN_WHITE_LIST,          "Not allowed to connect")
-TAOS_DEFINE_ERROR(TSDB_CODE_FAILED_TO_CONNECT_S3,          "Failed to connect to s3 server")
+TAOS_DEFINE_ERROR(TSDB_CODE_IP_NOT_IN_WHITE_LIST,         "Not allowed to connect")
+TAOS_DEFINE_ERROR(TSDB_CODE_FAILED_TO_CONNECT_S3,         "Failed to connect to s3 server")
 
 //client
 TAOS_DEFINE_ERROR(TSDB_CODE_TSC_INVALID_OPERATION,        "Invalid operation")
diff --git a/tests/army/community/cmdline/fullopt.py b/tests/army/community/cmdline/fullopt.py
index 99c7095a38..39d1d581ed 100644
--- a/tests/army/community/cmdline/fullopt.py
+++ b/tests/army/community/cmdline/fullopt.py
@@ -119,6 +119,8 @@ class TDTestCase(TBase):
         # stop taosd test taos as server
         sc.dnodeStop(idx)
         etool.exeBinFile("taos", f'-n server', wait=False)
+        time.sleep(3)
+        eos.exe("pkill -9 taos")
 
     # run
     def run(self):
diff --git a/tests/army/community/query/query_basic.py b/tests/army/community/query/query_basic.py
index e3fdeb0f34..90916a1c6c 100644
--- a/tests/army/community/query/query_basic.py
+++ b/tests/army/community/query/query_basic.py
@@ -52,13 +52,14 @@ class TDTestCase(TBase):
         tdLog.info(f"do query.")
         
         # __group_key
-        sql = f"select count(*),_group_key(uti),uti from {self.stb} partition by uti;"
-        tdSql.execute(sql)
-        tdSql.checkRows(251)
+        sql = f"select count(*),_group_key(uti),uti from {self.stb} partition by uti"
+        tdSql.query(sql)
+        # column index 1 value same with 2
+        tdSql.checkSameColumn(1, 2)
 
-        sql = f"select count(*),_group_key(usi) from {self.stb} group by usi;"
-        tdSql.execute(sql)
-        tdSql.checkRows(997)
+        sql = f"select count(*),_group_key(usi),usi from {self.stb} group by usi limit 100;"
+        tdSql.query(sql)
+        tdSql.checkSameColumn(1, 2)
 
         # tail
         sql1 = "select ts,ui from d0 order by ts desc limit 5 offset 2;"
diff --git a/tests/army/frame/caseBase.py b/tests/army/frame/caseBase.py
index fcfcb7d066..b1500b69e1 100644
--- a/tests/army/frame/caseBase.py
+++ b/tests/army/frame/caseBase.py
@@ -193,10 +193,10 @@ class TBase:
 
         # sql
         rows1 = tdSql.query(sql1,queryTimes=2)
-        res1 = copy.deepcopy(tdSql.queryResult)
+        res1 = copy.deepcopy(tdSql.res)
 
         tdSql.query(sql2,queryTimes=2)
-        res2 = tdSql.queryResult
+        res2 = tdSql.res
 
         rowlen1 = len(res1)
         rowlen2 = len(res2)
diff --git a/tests/army/frame/common.py b/tests/army/frame/common.py
index 5cdb3f9f46..d11a0dbb4d 100644
--- a/tests/army/frame/common.py
+++ b/tests/army/frame/common.py
@@ -795,7 +795,7 @@ class TDCom:
     def getOneRow(self, location, containElm):
         res_list = list()
         if 0 <= location < tdSql.queryRows:
-            for row in tdSql.queryResult:
+            for row in tdSql.res:
                 if row[location] == containElm:
                     res_list.append(row)
             return res_list
@@ -943,7 +943,7 @@ class TDCom:
         """drop all streams
         """
         tdSql.query("show streams")
-        stream_name_list = list(map(lambda x: x[0], tdSql.queryResult))
+        stream_name_list = list(map(lambda x: x[0], tdSql.res))
         for stream_name in stream_name_list:
             tdSql.execute(f'drop stream if exists {stream_name};')
 
@@ -962,7 +962,7 @@ class TDCom:
         """drop all databases
         """
         tdSql.query("show databases;")
-        db_list = list(map(lambda x: x[0], tdSql.queryResult))
+        db_list = list(map(lambda x: x[0], tdSql.res))
         for dbname in db_list:
             if dbname not in self.white_list and "telegraf" not in dbname:
                 tdSql.execute(f'drop database if exists `{dbname}`')
@@ -1412,7 +1412,7 @@ class TDCom:
             input_function (str): scalar
         """
         tdSql.query(sql)
-        res = tdSql.queryResult
+        res = tdSql.res
         if input_function in ["acos", "asin", "atan", "cos", "log", "pow", "sin", "sqrt", "tan"]:
             tdSql.checkEqual(res[1][1], "DOUBLE")
             tdSql.checkEqual(res[2][1], "DOUBLE")
@@ -1490,7 +1490,7 @@ class TDCom:
             bigint: bigint-ts
         """
         tdSql.query(f'select cast({str_ts} as bigint)')
-        return tdSql.queryResult[0][0]
+        return tdSql.res[0][0]
 
     def cast_query_data(self, query_data):
         """cast query-result for existed-stb
@@ -1514,7 +1514,7 @@ class TDCom:
                         tdSql.query(f'select cast("{v}" as binary(6))')
                     else:
                         tdSql.query(f'select cast("{v}" as {" ".join(col_tag_type_list[i].strip().split(" ")[1:])})')
-                    query_data_l[i] = tdSql.queryResult[0][0]
+                    query_data_l[i] = tdSql.res[0][0]
                 else:
                     query_data_l[i] = v
             nl.append(tuple(query_data_l))
@@ -1566,9 +1566,9 @@ class TDCom:
         if tag_value_list:
             dvalue = len(self.tag_type_str.split(',')) - defined_tag_count
         tdSql.query(sql1)
-        res1 = tdSql.queryResult
+        res1 = tdSql.res
         tdSql.query(sql2)
-        res2 = self.cast_query_data(tdSql.queryResult) if tag_value_list or use_exist_stb else tdSql.queryResult
+        res2 = self.cast_query_data(tdSql.res) if tag_value_list or use_exist_stb else tdSql.res
         tdSql.sql = sql1
         new_list = list()
         if tag_value_list:
@@ -1601,10 +1601,10 @@ class TDCom:
                 tdLog.info("query retrying ...")
                 new_list = list()
                 tdSql.query(sql1)
-                res1 = tdSql.queryResult
+                res1 = tdSql.res
                 tdSql.query(sql2)
-                # res2 = tdSql.queryResult
-                res2 = self.cast_query_data(tdSql.queryResult) if tag_value_list or use_exist_stb else tdSql.queryResult
+                # res2 = tdSql.res
+                res2 = self.cast_query_data(tdSql.res) if tag_value_list or use_exist_stb else tdSql.res
                 tdSql.sql = sql1
 
                 if tag_value_list:
@@ -1643,10 +1643,10 @@ class TDCom:
                 tdLog.info("query retrying ...")
                 new_list = list()
                 tdSql.query(sql1)
-                res1 = tdSql.queryResult
+                res1 = tdSql.res
                 tdSql.query(sql2)
-                # res2 = tdSql.queryResult
-                res2 = self.cast_query_data(tdSql.queryResult) if tag_value_list or use_exist_stb else tdSql.queryResult
+                # res2 = tdSql.res
+                res2 = self.cast_query_data(tdSql.res) if tag_value_list or use_exist_stb else tdSql.res
                 tdSql.sql = sql1
 
                 if tag_value_list:
diff --git a/tests/army/frame/server/cluster.py b/tests/army/frame/server/cluster.py
index ade8ac39a2..aba2d2e630 100644
--- a/tests/army/frame/server/cluster.py
+++ b/tests/army/frame/server/cluster.py
@@ -86,10 +86,9 @@ class ConfigureyCluster:
         count=0
         while count < 5:
             tdSql.query("select * from information_schema.ins_dnodes")
-            # tdLog.debug(tdSql.queryResult)
             status=0
             for i in range(self.dnodeNums):
-                if tdSql.queryResult[i][4] == "ready":
+                if tdSql.res[i][4] == "ready":
                     status+=1
             # tdLog.debug(status)
             
diff --git a/tests/army/frame/sql.py b/tests/army/frame/sql.py
index 3a26998b23..b5b5f836b9 100644
--- a/tests/army/frame/sql.py
+++ b/tests/army/frame/sql.py
@@ -78,6 +78,107 @@ class TDSql:
         self.cursor.execute(s)
         time.sleep(2)
 
+
+    #
+    #  do execute
+    #
+
+    def query(self, sql, row_tag=None, queryTimes=10, count_expected_res=None):
+        self.sql = sql
+        i=1
+        while i <= queryTimes:
+            try:
+                self.cursor.execute(sql)
+                self.res = self.cursor.fetchall()
+                self.queryRows = len(self.res)
+                self.queryCols = len(self.cursor.description)
+
+                if count_expected_res is not None:
+                    counter = 0
+                    while count_expected_res != self.res[0][0]:
+                        self.cursor.execute(sql)
+                        self.res = self.cursor.fetchall()
+                        if counter < queryTimes:
+                            counter += 0.5
+                            time.sleep(0.5)
+                        else:
+                            return False
+                if row_tag:
+                    return self.res
+                return self.queryRows
+            except Exception as e:
+                tdLog.notice("Try to query again, query times: %d "%i)
+                if i == queryTimes:
+                    caller = inspect.getframeinfo(inspect.stack()[1][0])
+                    args = (caller.filename, caller.lineno, sql, repr(e))
+                    tdLog.notice("%s(%d) failed: sql:%s, %s" % args)
+                    raise Exception(repr(e))
+                i+=1
+                time.sleep(1)
+                pass
+
+    def executeTimes(self, sql, times):
+        for i in range(times):
+            try:
+                return self.cursor.execute(sql)
+            except BaseException:
+                time.sleep(1)
+                continue
+
+    def execute(self, sql, queryTimes=30, show=False):
+        self.sql = sql
+        if show:
+            tdLog.info(sql)
+        i=1
+        while i <= queryTimes:
+            try:
+                self.affectedRows = self.cursor.execute(sql)
+                return self.affectedRows
+            except Exception as e:
+                tdLog.notice("Try to execute sql again, query times: %d "%i)
+                if i == queryTimes:
+                    caller = inspect.getframeinfo(inspect.stack()[1][0])
+                    args = (caller.filename, caller.lineno, sql, repr(e))
+                    tdLog.notice("%s(%d) failed: sql:%s, %s" % args)
+                    raise Exception(repr(e))
+                i+=1
+                time.sleep(1)
+                pass
+
+    # execute many sql
+    def executes(self, sqls, queryTimes=30, show=False):
+        for sql in sqls:
+            self.execute(sql, queryTimes, show)
+
+    def waitedQuery(self, sql, expectRows, timeout):
+        tdLog.info("sql: %s, try to retrieve %d rows in %d seconds" % (sql, expectRows, timeout))
+        self.sql = sql
+        try:
+            for i in range(timeout):
+                self.cursor.execute(sql)
+                self.res = self.cursor.fetchall()
+                self.queryRows = len(self.res)
+                self.queryCols = len(self.cursor.description)
+                tdLog.info("sql: %s, try to retrieve %d rows,get %d rows" % (sql, expectRows, self.queryRows))
+                if self.queryRows >= expectRows:
+                    return (self.queryRows, i)
+                time.sleep(1)
+        except Exception as e:
+            caller = inspect.getframeinfo(inspect.stack()[1][0])
+            args = (caller.filename, caller.lineno, sql, repr(e))
+            tdLog.notice("%s(%d) failed: sql:%s, %s" % args)
+            raise Exception(repr(e))
+        return (self.queryRows, timeout)
+
+    def is_err_sql(self, sql):
+        err_flag = True
+        try:
+            self.cursor.execute(sql)
+        except BaseException:
+            err_flag = False
+
+        return False if err_flag else True
+
     def error(self, sql, expectedErrno = None, expectErrInfo = None):
         caller = inspect.getframeinfo(inspect.stack()[1][0])
         expectErrNotOccured = True
@@ -95,7 +196,7 @@ class TDSql:
         else:
             self.queryRows = 0
             self.queryCols = 0
-            self.queryResult = None
+            self.res = None
 
             if expectedErrno != None:
                 if  expectedErrno == self.errno:
@@ -115,49 +216,25 @@ class TDSql:
 
             return self.error_info
 
-    def query(self, sql, row_tag=None, queryTimes=10, count_expected_res=None):
+    #
+    #  get session
+    #
+
+    def getData(self, row, col):
+        self.checkRowCol(row, col)
+        return self.res[row][col]
+
+    def getResult(self, sql):
         self.sql = sql
-        i=1
-        while i <= queryTimes:
-            try:
-                self.cursor.execute(sql)
-                self.queryResult = self.cursor.fetchall()
-                self.queryRows = len(self.queryResult)
-                self.queryCols = len(self.cursor.description)
-
-                if count_expected_res is not None:
-                    counter = 0
-                    while count_expected_res != self.queryResult[0][0]:
-                        self.cursor.execute(sql)
-                        self.queryResult = self.cursor.fetchall()
-                        if counter < queryTimes:
-                            counter += 0.5
-                            time.sleep(0.5)
-                        else:
-                            return False
-                if row_tag:
-                    return self.queryResult
-                return self.queryRows
-            except Exception as e:
-                tdLog.notice("Try to query again, query times: %d "%i)
-                if i == queryTimes:
-                    caller = inspect.getframeinfo(inspect.stack()[1][0])
-                    args = (caller.filename, caller.lineno, sql, repr(e))
-                    tdLog.notice("%s(%d) failed: sql:%s, %s" % args)
-                    raise Exception(repr(e))
-                i+=1
-                time.sleep(1)
-                pass
-
-
-    def is_err_sql(self, sql):
-        err_flag = True
         try:
             self.cursor.execute(sql)
-        except BaseException:
-            err_flag = False
-
-        return False if err_flag else True
+            self.res = self.cursor.fetchall()
+        except Exception as e:
+            caller = inspect.getframeinfo(inspect.stack()[1][0])
+            args = (caller.filename, caller.lineno, sql, repr(e))
+            tdLog.notice("%s(%d) failed: sql:%s, %s" % args)
+            raise Exception(repr(e))
+        return self.res
 
     def getVariable(self, search_attr):
         '''
@@ -193,29 +270,19 @@ class TDSql:
             return col_name_list, col_type_list
         return col_name_list
 
-    def waitedQuery(self, sql, expectRows, timeout):
-        tdLog.info("sql: %s, try to retrieve %d rows in %d seconds" % (sql, expectRows, timeout))
-        self.sql = sql
-        try:
-            for i in range(timeout):
-                self.cursor.execute(sql)
-                self.queryResult = self.cursor.fetchall()
-                self.queryRows = len(self.queryResult)
-                self.queryCols = len(self.cursor.description)
-                tdLog.info("sql: %s, try to retrieve %d rows,get %d rows" % (sql, expectRows, self.queryRows))
-                if self.queryRows >= expectRows:
-                    return (self.queryRows, i)
-                time.sleep(1)
-        except Exception as e:
-            caller = inspect.getframeinfo(inspect.stack()[1][0])
-            args = (caller.filename, caller.lineno, sql, repr(e))
-            tdLog.notice("%s(%d) failed: sql:%s, %s" % args)
-            raise Exception(repr(e))
-        return (self.queryRows, timeout)
-
     def getRows(self):
         return self.queryRows
 
+    # get first value
+    def getFirstValue(self, sql) :
+        self.query(sql)
+        return self.getData(0, 0)
+
+    
+    #
+    #  check session
+    #
+
     def checkRows(self, expectRows):
         if self.queryRows == expectRows:
             tdLog.info("sql:%s, queryRows:%d == expect:%d" % (self.sql, self.queryRows, expectRows))
@@ -273,26 +340,26 @@ class TDSql:
       
         self.checkRowCol(row, col)
 
-        if self.queryResult[row][col] != data:
+        if self.res[row][col] != data:
             if self.cursor.istype(col, "TIMESTAMP"):
                 # suppose user want to check nanosecond timestamp if a longer data passed``
                 if isinstance(data,str) :
                     if (len(data) >= 28):
-                        if self.queryResult[row][col] == _parse_ns_timestamp(data):
+                        if self.res[row][col] == _parse_ns_timestamp(data):
                             if(show):
                                tdLog.info("check successfully")
                         else:
                             caller = inspect.getframeinfo(inspect.stack()[1][0])
-                            args = (caller.filename, caller.lineno, self.sql, row, col, self.queryResult[row][col], data)
+                            args = (caller.filename, caller.lineno, self.sql, row, col, self.res[row][col], data)
                             tdLog.exit("%s(%d) failed: sql:%s row:%d col:%d data:%s != expect:%s" % args)
                     else:
-                        if self.queryResult[row][col].astimezone(datetime.timezone.utc) == _parse_datetime(data).astimezone(datetime.timezone.utc):
-                            # tdLog.info(f"sql:{self.sql}, row:{row} col:{col} data:{self.queryResult[row][col]} == expect:{data}")
+                        if self.res[row][col].astimezone(datetime.timezone.utc) == _parse_datetime(data).astimezone(datetime.timezone.utc):
+                            # tdLog.info(f"sql:{self.sql}, row:{row} col:{col} data:{self.res[row][col]} == expect:{data}")
                             if(show):
                                tdLog.info("check successfully")
                         else:
                             caller = inspect.getframeinfo(inspect.stack()[1][0])
-                            args = (caller.filename, caller.lineno, self.sql, row, col, self.queryResult[row][col], data)
+                            args = (caller.filename, caller.lineno, self.sql, row, col, self.res[row][col], data)
                             tdLog.exit("%s(%d) failed: sql:%s row:%d col:%d data:%s != expect:%s" % args)
                     return
                 elif isinstance(data,int):
@@ -304,72 +371,72 @@ class TDSql:
                         precision = 'ns'
                     else:
                         caller = inspect.getframeinfo(inspect.stack()[1][0])
-                        args = (caller.filename, caller.lineno, self.sql, row, col, self.queryResult[row][col], data)
+                        args = (caller.filename, caller.lineno, self.sql, row, col, self.res[row][col], data)
                         tdLog.exit("%s(%d) failed: sql:%s row:%d col:%d data:%s != expect:%s" % args)
                         return
                     success = False
                     if precision == 'ms':
-                        dt_obj = self.queryResult[row][col]
+                        dt_obj = self.res[row][col]
                         ts = int(int((dt_obj-datetime.datetime.fromtimestamp(0,dt_obj.tzinfo)).total_seconds())*1000) + int(dt_obj.microsecond/1000)
                         if ts == data:
                             success = True
                     elif precision == 'us':
-                        dt_obj = self.queryResult[row][col]
+                        dt_obj = self.res[row][col]
                         ts = int(int((dt_obj-datetime.datetime.fromtimestamp(0,dt_obj.tzinfo)).total_seconds())*1e6) + int(dt_obj.microsecond)
                         if ts == data:
                             success = True
                     elif precision == 'ns':
-                        if data == self.queryResult[row][col]:
+                        if data == self.res[row][col]:
                             success = True
                     if success:
                         if(show):
                             tdLog.info("check successfully")
                     else:
                         caller = inspect.getframeinfo(inspect.stack()[1][0])
-                        args = (caller.filename, caller.lineno, self.sql, row, col, self.queryResult[row][col], data)
+                        args = (caller.filename, caller.lineno, self.sql, row, col, self.res[row][col], data)
                         tdLog.exit("%s(%d) failed: sql:%s row:%d col:%d data:%s != expect:%s" % args)
                     return
                 elif isinstance(data,datetime.datetime):
-                    dt_obj = self.queryResult[row][col]
+                    dt_obj = self.res[row][col]
                     delt_data = data-datetime.datetime.fromtimestamp(0,data.tzinfo)
-                    delt_result = self.queryResult[row][col] - datetime.datetime.fromtimestamp(0,self.queryResult[row][col].tzinfo)
+                    delt_result = self.res[row][col] - datetime.datetime.fromtimestamp(0,self.res[row][col].tzinfo)
                     if delt_data == delt_result:
                         if(show):
                             tdLog.info("check successfully")
                     else:
                         caller = inspect.getframeinfo(inspect.stack()[1][0])
-                        args = (caller.filename, caller.lineno, self.sql, row, col, self.queryResult[row][col], data)
+                        args = (caller.filename, caller.lineno, self.sql, row, col, self.res[row][col], data)
                         tdLog.exit("%s(%d) failed: sql:%s row:%d col:%d data:%s != expect:%s" % args)
                     return
                 else:
                     caller = inspect.getframeinfo(inspect.stack()[1][0])
-                    args = (caller.filename, caller.lineno, self.sql, row, col, self.queryResult[row][col], data)
+                    args = (caller.filename, caller.lineno, self.sql, row, col, self.res[row][col], data)
                     tdLog.exit("%s(%d) failed: sql:%s row:%d col:%d data:%s != expect:%s" % args)
 
-            if str(self.queryResult[row][col]) == str(data):
-                # tdLog.info(f"sql:{self.sql}, row:{row} col:{col} data:{self.queryResult[row][col]} == expect:{data}")
+            if str(self.res[row][col]) == str(data):
+                # tdLog.info(f"sql:{self.sql}, row:{row} col:{col} data:{self.res[row][col]} == expect:{data}")
                 if(show):
                     tdLog.info("check successfully")
                 return
 
             elif isinstance(data, float):
-                if abs(data) >= 1 and abs((self.queryResult[row][col] - data) / data) <= 0.000001:
-                    # tdLog.info(f"sql:{self.sql}, row:{row} col:{col} data:{self.queryResult[row][col]} == expect:{data}")
+                if abs(data) >= 1 and abs((self.res[row][col] - data) / data) <= 0.000001:
+                    # tdLog.info(f"sql:{self.sql}, row:{row} col:{col} data:{self.res[row][col]} == expect:{data}")
                     if(show):
                         tdLog.info("check successfully")
-                elif abs(data) < 1 and abs(self.queryResult[row][col] - data) <= 0.000001:
-                    # tdLog.info(f"sql:{self.sql}, row:{row} col:{col} data:{self.queryResult[row][col]} == expect:{data}")
+                elif abs(data) < 1 and abs(self.res[row][col] - data) <= 0.000001:
+                    # tdLog.info(f"sql:{self.sql}, row:{row} col:{col} data:{self.res[row][col]} == expect:{data}")
                     if(show):
                         tdLog.info("check successfully")
 
                 else:
                     caller = inspect.getframeinfo(inspect.stack()[1][0])
-                    args = (caller.filename, caller.lineno, self.sql, row, col, self.queryResult[row][col], data)
+                    args = (caller.filename, caller.lineno, self.sql, row, col, self.res[row][col], data)
                     tdLog.exit("%s(%d) failed: sql:%s row:%d col:%d data:%s != expect:%s" % args)
                 return
             else:
                 caller = inspect.getframeinfo(inspect.stack()[1][0])
-                args = (caller.filename, caller.lineno, self.sql, row, col, self.queryResult[row][col], data)
+                args = (caller.filename, caller.lineno, self.sql, row, col, self.res[row][col], data)
                 tdLog.exit("%s(%d) failed: sql:%s row:%d col:%d data:%s != expect:%s" % args)
         if(show):         
             tdLog.info("check successfully")
@@ -441,23 +508,23 @@ class TDSql:
     def checkDataNoExit(self, row, col, data):
         if self.checkRowColNoExit(row, col) == False:
             return False
-        if self.queryResult[row][col] != data:
+        if self.res[row][col] != data:
             if self.cursor.istype(col, "TIMESTAMP"):
                 # suppose user want to check nanosecond timestamp if a longer data passed
                 if (len(data) >= 28):
-                    if pd.to_datetime(self.queryResult[row][col]) == pd.to_datetime(data):
+                    if pd.to_datetime(self.res[row][col]) == pd.to_datetime(data):
                         return True
                 else:
-                    if self.queryResult[row][col] == _parse_datetime(data):
+                    if self.res[row][col] == _parse_datetime(data):
                         return True
                 return False
 
-            if str(self.queryResult[row][col]) == str(data):
+            if str(self.res[row][col]) == str(data):
                 return True
             elif isinstance(data, float):
-                if abs(data) >= 1 and abs((self.queryResult[row][col] - data) / data) <= 0.000001:
+                if abs(data) >= 1 and abs((self.res[row][col] - data) / data) <= 0.000001:
                     return True
-                elif abs(data) < 1 and abs(self.queryResult[row][col] - data) <= 0.000001:
+                elif abs(data) < 1 and abs(self.res[row][col] - data) <= 0.000001:
                     return True
                 else:
                     return False
@@ -481,56 +548,6 @@ class TDSql:
         self.query(sql)
         self.checkData(row, col, data)
 
-
-    def getData(self, row, col):
-        self.checkRowCol(row, col)
-        return self.queryResult[row][col]
-
-    def getResult(self, sql):
-        self.sql = sql
-        try:
-            self.cursor.execute(sql)
-            self.queryResult = self.cursor.fetchall()
-        except Exception as e:
-            caller = inspect.getframeinfo(inspect.stack()[1][0])
-            args = (caller.filename, caller.lineno, sql, repr(e))
-            tdLog.notice("%s(%d) failed: sql:%s, %s" % args)
-            raise Exception(repr(e))
-        return self.queryResult
-
-    def executeTimes(self, sql, times):
-        for i in range(times):
-            try:
-                return self.cursor.execute(sql)
-            except BaseException:
-                time.sleep(1)
-                continue
-
-    def execute(self, sql, queryTimes=30, show=False):
-        self.sql = sql
-        if show:
-            tdLog.info(sql)
-        i=1
-        while i <= queryTimes:
-            try:
-                self.affectedRows = self.cursor.execute(sql)
-                return self.affectedRows
-            except Exception as e:
-                tdLog.notice("Try to execute sql again, query times: %d "%i)
-                if i == queryTimes:
-                    caller = inspect.getframeinfo(inspect.stack()[1][0])
-                    args = (caller.filename, caller.lineno, sql, repr(e))
-                    tdLog.notice("%s(%d) failed: sql:%s, %s" % args)
-                    raise Exception(repr(e))
-                i+=1
-                time.sleep(1)
-                pass
-
-    # execute many sql
-    def executes(self, sqls, queryTimes=30, show=False):
-        for sql in sqls:
-            self.execute(sql, queryTimes, show)
-
     def checkAffectedRows(self, expectAffectedRows):
         if self.affectedRows != expectAffectedRows:
             caller = inspect.getframeinfo(inspect.stack()[1][0])
@@ -588,17 +605,22 @@ class TDSql:
     def checkAgg(self, sql, expectCnt):
         self.query(sql)
         self.checkData(0, 0, expectCnt)
-
-    # get first value
-    def getFirstValue(self, sql) :
-        self.query(sql)
-        return self.getData(0, 0)
     
     # expect first value
     def checkFirstValue(self, sql, expect):
         self.query(sql)
         self.checkData(0, 0, expect)
-        
+
+    # colIdx1 value same with colIdx2
+    def checkSameColumn(self, c1, c2):
+        for i in range(self.queryRows):
+            if self.res[i][c1] != self.res[i][c2]:
+                tdLog.exit(f"Not same. row={i} col1={c1} col2={c2}. {self.res[i][c1]}!={self.res[i][c2]}")
+        tdLog.info(f"check {self.queryRows} rows two column value same. column index [{c1},{c2}]")
+
+    #
+    # others session
+    #
 
     def get_times(self, time_str, precision="ms"):
         caller = inspect.getframeinfo(inspect.stack()[1][0])
diff --git a/tests/army/test.py b/tests/army/test.py
index a3e28b772d..a94fefe0be 100644
--- a/tests/army/test.py
+++ b/tests/army/test.py
@@ -560,17 +560,6 @@ if __name__ == "__main__":
                     conn = taosws.connect(f"taosws://root:taosdata@{host}:6041")
                 else:
                     conn = taos.connect(host=f"{host}", config=tdDnodes.getSimCfgPath())
-                # tdSql.init(conn.cursor())
-                # tdSql.execute("create qnode on dnode 1")
-                # tdSql.execute('alter local "queryPolicy" "%d"'%queryPolicy)
-                # tdSql.query("show local variables;")
-                # for i in range(tdSql.queryRows):
-                #     if tdSql.queryResult[i][0] == "queryPolicy" :
-                #         if int(tdSql.queryResult[i][1]) == int(queryPolicy):
-                #             tdLog.info('alter queryPolicy to %d successfully'%queryPolicy)
-                #         else :
-                #             tdLog.debug(tdSql.queryResult)
-                #             tdLog.exit("alter queryPolicy to  %d failed"%queryPolicy)
 
                 cursor = conn.cursor()
                 cursor.execute("create qnode on dnode 1")
diff --git a/tests/parallel_test/cases.task b/tests/parallel_test/cases.task
index 766afc5358..351c177cc2 100644
--- a/tests/parallel_test/cases.task
+++ b/tests/parallel_test/cases.task
@@ -3,7 +3,13 @@
 #NA,NA,y or n,script,./test.sh -f tsim/user/basic.sim
 
 #unit-test
+
+archOs=$(arch)
+if [[ $archOs =~ "aarch64" ]]; then
+,,n,unit-test,bash test.sh
+else
 ,,y,unit-test,bash test.sh
+fi
 
 #
 # army-test
@@ -12,6 +18,7 @@
 ,,y,army,./pytest.sh python3 ./test.py -f enterprise/s3/s3_basic.py -L 3 -D 1
 ,,y,army,./pytest.sh python3 ./test.py -f community/cluster/snapshot.py -N 3 -L 3 -D 2
 ,,y,army,./pytest.sh python3 ./test.py -f community/query/fill/fill_desc.py -N 3 -L 3 -D 2
+,,y,army,./pytest.sh python3 ./test.py -f community/query/query_basic.py -N 3
 ,,n,army,python3 ./test.py -f community/cmdline/fullopt.py
 
 
@@ -37,6 +44,7 @@
 #,,n,system-test,python3 ./test.py -f 8-stream/snode_restart.py -N 4
 ,,n,system-test,python3 ./test.py -f 8-stream/snode_restart_with_checkpoint.py -N 4
 
+,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/project_group.py
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/tbname_vgroup.py
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/count_interval.py
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/compact-col.py
@@ -1245,7 +1253,9 @@ e
 ,,y,script,./test.sh -f tsim/sma/tsmaCreateInsertQuery.sim
 ,,y,script,./test.sh -f tsim/sma/rsmaCreateInsertQuery.sim
 ,,y,script,./test.sh -f tsim/sma/rsmaCreateInsertQueryDelete.sim
-,,y,script,./test.sh -f tsim/sma/rsmaPersistenceRecovery.sim
+
+### refactor stream backend, open case after rsma refactored
+#,,y,script,./test.sh -f tsim/sma/rsmaPersistenceRecovery.sim
 ,,y,script,./test.sh -f tsim/sync/vnodesnapshot-rsma-test.sim
 ,,n,script,./test.sh -f tsim/valgrind/checkError1.sim
 ,,n,script,./test.sh -f tsim/valgrind/checkError2.sim
diff --git a/tests/pytest/util/sql.py b/tests/pytest/util/sql.py
index 62af9a1af9..92074161b6 100644
--- a/tests/pytest/util/sql.py
+++ b/tests/pytest/util/sql.py
@@ -97,7 +97,24 @@ class TDSql:
                 i+=1
                 time.sleep(1)
                 pass
-            
+
+    def no_error(self, sql):
+        caller = inspect.getframeinfo(inspect.stack()[1][0])
+        expectErrOccurred = False
+
+        try:
+            self.cursor.execute(sql)
+        except BaseException as e:
+            expectErrOccurred = True
+            self.errno = e.errno
+            error_info = repr(e)
+            self.error_info = ','.join(error_info[error_info.index('(') + 1:-1].split(",")[:-1]).replace("'", "")
+
+        if expectErrOccurred:
+            tdLog.exit("%s(%d) failed: sql:%s, unexpect error '%s' occurred" % (caller.filename, caller.lineno, sql, self.error_info))
+        else:
+            tdLog.info("sql:%s, check passed, no ErrInfo occurred" % (sql))
+
     def error(self, sql, expectedErrno = None, expectErrInfo = None, fullMatched = True):
         caller = inspect.getframeinfo(inspect.stack()[1][0])
         expectErrNotOccured = True
@@ -126,9 +143,9 @@ class TDSql:
 
                 if expectErrInfo != None:
                     if expectErrInfo == self.error_info:
-                        tdLog.info("sql:%s, expected expectErrInfo '%s' occured" % (sql, expectErrInfo))
+                        tdLog.info("sql:%s, expected ErrInfo '%s' occured" % (sql, expectErrInfo))
                     else:
-                        tdLog.exit("%s(%d) failed: sql:%s, expectErrInfo '%s' occured, but not expected expectErrInfo '%s'" % (caller.filename, caller.lineno, sql, self.error_info, expectErrInfo))
+                        tdLog.exit("%s(%d) failed: sql:%s, ErrInfo '%s' occured, but not expected ErrInfo '%s'" % (caller.filename, caller.lineno, sql, self.error_info, expectErrInfo))
             else:
                 if expectedErrno != None:
                     if expectedErrno in self.errno:
@@ -138,9 +155,9 @@ class TDSql:
 
                 if expectErrInfo != None:
                     if expectErrInfo in self.error_info:
-                        tdLog.info("sql:%s, expected expectErrInfo '%s' occured" % (sql, expectErrInfo))
+                        tdLog.info("sql:%s, expected ErrInfo '%s' occured" % (sql, expectErrInfo))
                     else:
-                        tdLog.exit("%s(%d) failed: sql:%s, expectErrInfo %s occured, but not expected expectErrInfo '%s'" % (caller.filename, caller.lineno, sql, self.error_info, expectErrInfo))
+                        tdLog.exit("%s(%d) failed: sql:%s, ErrInfo %s occured, but not expected ErrInfo '%s'" % (caller.filename, caller.lineno, sql, self.error_info, expectErrInfo))
 
             return self.error_info
 
diff --git a/tests/script/tsim/parser/condition_query.sim b/tests/script/tsim/parser/condition_query.sim
index d9bfcb8074..660e91dbfd 100644
--- a/tests/script/tsim/parser/condition_query.sim
+++ b/tests/script/tsim/parser/condition_query.sim
@@ -1505,7 +1505,7 @@ if $data10 != @21-05-05 18:19:21.000@ then
   return -1
 endi
 
-sql select a.ts,b.ts,a.c1,b.u1,b.u2 from (select * from stb1) a, (select * from stb2) b where a.ts=b.ts and (a.c1 < 10 or a.c1 > 30) and (b.u1 < 5 or b.u1 > 5) order by ts;
+sql select a.ts,b.ts,a.c1,b.u1,b.u2 from (select * from stb1) a, (select * from stb2) b where a.ts=b.ts and (a.c1 < 10 or a.c1 > 30) and (b.u1 < 5 or b.u1 > 5) order by a.ts;
 if $rows != 4 then
   return -1
 endi
@@ -1521,8 +1521,9 @@ endi
 if $data30 != @21-05-05 18:19:14.000@ then
   return -1
 endi
+sql_error select a.ts,b.ts,a.c1,b.u1,b.u2 from (select * from stb1) a, (select * from stb2) b where a.ts=b.ts and (a.c1 < 10 or a.c1 > 30) and (b.u1 < 5 or b.u1 > 5) order by ts;
 
-sql select a.ts,b.ts,a.c1,b.u1,b.u2 from (select * from stb1) a, (select * from stb2) b where a.ts=b.ts and a.c1 < 30 and b.u1 > 1 and a.c1 > 10 and b.u1 < 8 and b.u1<>5 order by ts;
+sql select a.ts,b.ts,a.c1,b.u1,b.u2 from (select * from stb1) a, (select * from stb2) b where a.ts=b.ts and a.c1 < 30 and b.u1 > 1 and a.c1 > 10 and b.u1 < 8 and b.u1<>5 order by a.ts;
 if $rows != 3 then
   return -1
 endi
@@ -1535,6 +1536,8 @@ endi
 if $data20 != @21-05-05 18:19:10.000@ then
   return -1
 endi
+sql_error select a.ts,b.ts,a.c1,b.u1,b.u2 from (select * from stb1) a, (select * from stb2) b where a.ts=b.ts and a.c1 < 30 and b.u1 > 1 and a.c1 > 10 and b.u1 < 8 and b.u1<>5 order by ts;
+sql select a.ts,a.ts,a.c1,b.u1,b.u2 from (select * from stb1) a, (select * from stb2) b where a.ts=b.ts and a.c1 < 30 and b.u1 > 1 and a.c1 > 10 and b.u1 < 8 and b.u1<>5 order by ts;
 
 sql select * from stb1 where c1 is null and c1 is not null;
 if $rows != 0 then
@@ -2469,7 +2472,7 @@ endi
 if $data10 != @21-05-05 18:19:05.000@ then
   return -1
 endi
-sql select tb1.ts,tb1.*,tb2_1.* from tb1, tb2_1 where tb1.ts=tb2_1.ts and tb1.ts > '2021-05-05 18:19:03.000' and tb2_1.u1 < 5 order by ts;
+sql select tb1.ts,tb1.*,tb2_1.* from tb1, tb2_1 where tb1.ts=tb2_1.ts and tb1.ts > '2021-05-05 18:19:03.000' and tb2_1.u1 < 5 order by tb1.ts;
 if $rows != 2 then
   return -1
 endi
@@ -2480,7 +2483,7 @@ if $data10 != @21-05-05 18:19:06.000@ then
   return -1
 endi
 
-sql select tb1.ts,tb1.*,tb2_1.* from tb1, tb2_1 where tb1.ts=tb2_1.ts and tb1.ts >= '2021-05-05 18:19:03.000' and tb1.c7=false and tb2_1.u3>4 order by ts;
+sql select tb1.ts,tb1.*,tb2_1.* from tb1, tb2_1 where tb1.ts=tb2_1.ts and tb1.ts >= '2021-05-05 18:19:03.000' and tb1.c7=false and tb2_1.u3>4 order by tb1.ts;
 if $rows != 2 then
   return -1
 endi
@@ -2491,7 +2494,7 @@ if $data10 != @21-05-05 18:19:07.000@ then
   return -1
 endi
 
-sql select stb1.ts,stb1.c1,stb1.t1,stb2.ts,stb2.u1,stb2.t4 from stb1, stb2 where stb1.ts=stb2.ts and stb1.t1 = stb2.t4 order by ts;
+sql select stb1.ts,stb1.c1,stb1.t1,stb2.ts,stb2.u1,stb2.t4 from stb1, stb2 where stb1.ts=stb2.ts and stb1.t1 = stb2.t4 order by stb1.ts;
 if $rows != 9 then
   return -1
 endi
@@ -2523,7 +2526,7 @@ if $data80 != @21-05-05 18:19:11.000@ then
   return -1
 endi
 
-sql select stb1.ts,stb1.c1,stb1.t1,stb2.ts,stb2.u1,stb2.t4 from stb1, stb2 where stb1.ts=stb2.ts and stb1.t1 = stb2.t4 and stb1.c1 > 2 and stb2.u1 <=4 order by ts;
+sql select stb1.ts,stb1.c1,stb1.t1,stb2.ts,stb2.u1,stb2.t4 from stb1, stb2 where stb1.ts=stb2.ts and stb1.t1 = stb2.t4 and stb1.c1 > 2 and stb2.u1 <=4 order by stb1.ts;
 if $rows != 3 then
   return -1
 endi
diff --git a/tests/script/tsim/stream/partitionby1.sim b/tests/script/tsim/stream/partitionby1.sim
index d92aecb3a6..24c588d410 100644
--- a/tests/script/tsim/stream/partitionby1.sim
+++ b/tests/script/tsim/stream/partitionby1.sim
@@ -13,6 +13,8 @@ sql create table ts3 using st tags(3,2,2);
 sql create table ts4 using st tags(4,2,2);
 sql create stream stream_t1 trigger at_once IGNORE EXPIRED 0 IGNORE UPDATE 0  into streamtST1 as select  _wstart, count(*) c1, count(d) c2 , sum(a) c3 , max(b)  c4, min(c) c5 from st partition by tbname interval(10s);
 
+sleep 1000
+
 sql insert into ts1 values(1648791213001,1,12,3,1.0);
 sql insert into ts2 values(1648791213001,1,12,3,1.0);
 
diff --git a/tests/script/tsim/valgrind/checkError8.sim b/tests/script/tsim/valgrind/checkError8.sim
index 2f204768eb..3942765eb7 100644
--- a/tests/script/tsim/valgrind/checkError8.sim
+++ b/tests/script/tsim/valgrind/checkError8.sim
@@ -129,10 +129,10 @@ sql select a.ts,a.c1,a.c8 from (select * from stb1 where c7=true) a, (select * f
 sql select * from stb1 where (c6 > 3.0 or c6 < 60) and c6 > 50 and (c6 != 53 or c6 != 63);;
 sql select ts,c1 from stb1 where (c1 > 60 or c1 < 10 or (c1 > 20 and c1 < 30)) and ts > '2021-05-05 18:19:00.000' and ts < '2021-05-05 18:19:25.000' and c1 != 21 and c1 != 22 order by ts;
 sql select a.* from (select * from stb1 where c7=true) a, (select * from stb1 where c1 > 30) b where a.ts=b.ts and a.c1 > 50 order by ts;;
-sql select a.ts,b.ts,a.c1,b.u1,b.u2 from (select * from stb1) a, (select * from stb2) b where a.ts=b.ts and (a.c1 < 10 or a.c1 > 30) and (b.u1 < 5 or b.u1 > 5) order by ts;;
-sql select a.ts,b.ts,a.c1,b.u1,b.u2 from (select * from stb1) a, (select * from stb2) b where a.ts=b.ts and a.c1 < 30 and b.u1 > 1 and a.c1 > 10 and b.u1 < 8 and b.u1<>5 order by ts;;
-sql select tb1.ts,tb1.*,tb2_1.* from tb1, tb2_1 where tb1.ts=tb2_1.ts and tb1.ts >= '2021-05-05 18:19:03.000' and tb1.c7=false and tb2_1.u3>4 order by ts;;
-sql select stb1.ts,stb1.c1,stb1.t1,stb2.ts,stb2.u1,stb2.t4 from stb1, stb2 where stb1.ts=stb2.ts and stb1.t1 = stb2.t4 order by ts;;
+sql select a.ts,b.ts,a.c1,b.u1,b.u2 from (select * from stb1) a, (select * from stb2) b where a.ts=b.ts and (a.c1 < 10 or a.c1 > 30) and (b.u1 < 5 or b.u1 > 5) order by a.ts;;
+sql select a.ts,b.ts,a.c1,b.u1,b.u2 from (select * from stb1) a, (select * from stb2) b where a.ts=b.ts and a.c1 < 30 and b.u1 > 1 and a.c1 > 10 and b.u1 < 8 and b.u1<>5 order by a.ts;;
+sql select tb1.ts,tb1.*,tb2_1.* from tb1, tb2_1 where tb1.ts=tb2_1.ts and tb1.ts >= '2021-05-05 18:19:03.000' and tb1.c7=false and tb2_1.u3>4 order by tb1.ts;;
+sql select stb1.ts,stb1.c1,stb1.t1,stb2.ts,stb2.u1,stb2.t4 from stb1, stb2 where stb1.ts=stb2.ts and stb1.t1 = stb2.t4 order by stb1.ts;;
 sql select count(*) from stb1 where tbname like 'tb%' or c1 > 0;;
 sql select * from stb1 where tbname like 'tb%' and (t1=1 or t2=2 or t3=3) and t1 > 2 order by ts;;
 
diff --git a/tests/script/win-test-file b/tests/script/win-test-file
index 744415c89f..b9f250927f 100644
--- a/tests/script/win-test-file
+++ b/tests/script/win-test-file
@@ -280,7 +280,9 @@
 ./test.sh -f tsim/sma/tsmaCreateInsertQuery.sim
 ./test.sh -f tsim/sma/rsmaCreateInsertQuery.sim
 ./test.sh -f tsim/sma/rsmaCreateInsertQueryDelete.sim
-./test.sh -f tsim/sma/rsmaPersistenceRecovery.sim
+
+### refactor stream backend, open case after rsma refactored
+#./test.sh -f tsim/sma/rsmaPersistenceRecovery.sim
 ./test.sh -f tsim/sync/vnodesnapshot-rsma-test.sim
 ./test.sh -f tsim/valgrind/checkError1.sim
 ./test.sh -f tsim/valgrind/checkError2.sim
diff --git a/tests/system-test/2-query/last_row.py b/tests/system-test/2-query/last_row.py
index 6469b3ea54..0744b3bae5 100644
--- a/tests/system-test/2-query/last_row.py
+++ b/tests/system-test/2-query/last_row.py
@@ -861,11 +861,56 @@ class TDTestCase:
 
         self.support_super_table_test()
 
+    def initLastRowDelayTest(self, dbname="db"):
+        tdSql.execute(f"drop database if exists {dbname} ")
+        create_db_sql = f"create database if not exists {dbname} keep 3650 duration 1000 cachemodel 'NONE' REPLICA 1"
+        tdSql.execute(create_db_sql)
+
+        time.sleep(3)
+        tdSql.execute(f"use {dbname}")
+        tdSql.execute(f'create stable {dbname}.st(ts timestamp, v_int int, v_float float) TAGS (ctname varchar(32))')
+
+        tdSql.execute(f"create table {dbname}.ct1 using {dbname}.st tags('ct1')")
+        tdSql.execute(f"create table {dbname}.ct2 using {dbname}.st tags('ct2')")
+
+        tdSql.execute(f"insert into {dbname}.st(tbname,ts,v_float, v_int) values('ct1',1630000000000,86,86)")
+        tdSql.execute(f"insert into {dbname}.st(tbname,ts,v_float, v_int) values('ct1',1630000021255,59,59)")
+        tdSql.execute(f'flush database {dbname}')
+        tdSql.execute(f'select last(*) from {dbname}.st')
+        tdSql.execute(f'select last_row(*) from {dbname}.st')
+        tdSql.execute(f"insert into {dbname}.st(tbname,ts) values('ct1',1630000091255)")
+        tdSql.execute(f'flush database {dbname}')
+        tdSql.execute(f'select last(*) from {dbname}.st')
+        tdSql.execute(f'select last_row(*) from {dbname}.st')
+        tdSql.execute(f'alter database {dbname} cachemodel "both"')
+        tdSql.query(f'select last(*) from {dbname}.st')
+        tdSql.checkData(0 , 1 , 59)
+
+        tdSql.query(f'select last_row(*) from {dbname}.st')
+        tdSql.checkData(0 , 1 , None)
+        tdSql.checkData(0 , 2 , None)
+
+        tdLog.printNoPrefix("========== delay test init success ==============")
+
+    def lastRowDelayTest(self, dbname="db"):
+        tdLog.printNoPrefix("========== delay test start ==============")
+
+        tdSql.execute(f"use {dbname}")
+
+        tdSql.query(f'select last(*) from {dbname}.st')
+        tdSql.checkData(0 , 1 , 59)
+
+        tdSql.query(f'select last_row(*) from {dbname}.st')
+        tdSql.checkData(0 , 1 , None)
+        tdSql.checkData(0 , 2 , None)
+
     def run(self):  # sourcery skip: extract-duplicate-method, remove-redundant-fstring
         # tdSql.prepare()
 
         tdLog.printNoPrefix("==========step1:create table ==============")
 
+        self.initLastRowDelayTest("DELAYTEST")
+
         # cache_last 0
         self.prepare_datas("'NONE' ")
         self.prepare_tag_datas("'NONE'")
@@ -890,6 +935,8 @@ class TDTestCase:
         self.insert_datas_and_check_abs(self.tb_nums,self.row_nums,self.time_step,"'BOTH'")
         self.basic_query()
 
+        self.lastRowDelayTest("DELAYTEST")
+
 
     def stop(self):
         tdSql.close()
diff --git a/tests/system-test/2-query/orderBy.py b/tests/system-test/2-query/orderBy.py
index dedc57eab3..1cf1478439 100644
--- a/tests/system-test/2-query/orderBy.py
+++ b/tests/system-test/2-query/orderBy.py
@@ -278,19 +278,19 @@ class TDTestCase:
 
     def queryOrderByAgg(self):
 
-        tdSql.query("SELECT COUNT(*) FROM t1 order by COUNT(*)")
+        tdSql.no_error("SELECT COUNT(*) FROM t1 order by COUNT(*)")
 
-        tdSql.query("SELECT COUNT(*) FROM t1 order by last(c2)")
+        tdSql.no_error("SELECT COUNT(*) FROM t1 order by last(c2)")
 
-        tdSql.query("SELECT c1 FROM t1 order by last(ts)")
+        tdSql.no_error("SELECT c1 FROM t1 order by last(ts)")
 
-        tdSql.query("SELECT ts FROM t1 order by last(ts)")
+        tdSql.no_error("SELECT ts FROM t1 order by last(ts)")
 
-        tdSql.query("SELECT last(ts), ts, c1 FROM t1 order by 2")
+        tdSql.no_error("SELECT last(ts), ts, c1 FROM t1 order by 2")
 
-        tdSql.query("SELECT ts, last(ts) FROM t1 order by last(ts)")
+        tdSql.no_error("SELECT ts, last(ts) FROM t1 order by last(ts)")
 
-        tdSql.query(f"SELECT * FROM t1 order by last(ts)")
+        tdSql.no_error(f"SELECT * FROM t1 order by last(ts)")
 
         tdSql.query(f"SELECT last(ts) as t2, ts FROM t1 order by 1")
         tdSql.checkRows(1)
@@ -302,6 +302,18 @@ class TDTestCase:
 
         tdSql.error(f"SELECT last(ts) as t2, ts FROM t1 order by last(t2)")
 
+    def queryOrderByAmbiguousName(self):
+        tdSql.error(sql="select c1 as name, c2 as name, c3 from t1 order by name", expectErrInfo='ambiguous',
+                    fullMatched=False)
+
+        tdSql.error(sql="select c1, c2 as c1, c3 from t1 order by c1", expectErrInfo='ambiguous', fullMatched=False)
+
+        tdSql.error(sql='select last(ts), last(c1) as name ,last(c2) as name,last(c3) from t1 order by name',
+                    expectErrInfo='ambiguous', fullMatched=False)
+
+        tdSql.no_error("select c1 as name, c2 as c1, c3 from t1 order by c1")
+
+        tdSql.no_error('select c1 as name from (select c1, c2 as name from st) order by name')
 
     # run
     def run(self):
@@ -317,6 +329,8 @@ class TDTestCase:
         # agg
         self.queryOrderByAgg()
 
+        # td-28332
+        self.queryOrderByAmbiguousName()
 
     # stop
     def stop(self):
diff --git a/tests/system-test/2-query/project_group.py b/tests/system-test/2-query/project_group.py
new file mode 100644
index 0000000000..44943e5088
--- /dev/null
+++ b/tests/system-test/2-query/project_group.py
@@ -0,0 +1,65 @@
+from wsgiref.headers import tspecials
+from util.log import *
+from util.cases import *
+from util.sql import *
+import numpy as np
+
+
+class TDTestCase:
+    def init(self, conn, logSql, replicaVar=1):
+        self.replicaVar = int(replicaVar)
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor())
+
+        self.rowNum = 10
+        self.batchNum = 5
+        self.ts = 1537146000000
+
+    def run(self):
+        dbname = "db"
+        tdSql.prepare()
+
+        tdSql.execute(f'''create table sta(ts timestamp, col1 int, col2 bigint) tags(tg1 int, tg2 binary(20))''')
+        tdSql.execute(f"create table sta1 using sta tags(1, 'a')")
+        tdSql.execute(f"create table sta2 using sta tags(2, 'b')")
+        tdSql.execute(f"create table sta3 using sta tags(3, 'c')")
+        tdSql.execute(f"create table sta4 using sta tags(4, 'a')")
+        tdSql.execute(f"insert into sta1 values(1537146000001, 11, 110)")
+        tdSql.execute(f"insert into sta1 values(1537146000002, 12, 120)")
+        tdSql.execute(f"insert into sta1 values(1537146000003, 13, 130)")
+        tdSql.execute(f"insert into sta2 values(1537146000001, 21, 210)")
+        tdSql.execute(f"insert into sta2 values(1537146000002, 22, 220)")
+        tdSql.execute(f"insert into sta2 values(1537146000003, 23, 230)")
+        tdSql.execute(f"insert into sta3 values(1537146000001, 31, 310)")
+        tdSql.execute(f"insert into sta3 values(1537146000002, 32, 320)")
+        tdSql.execute(f"insert into sta3 values(1537146000003, 33, 330)")
+        tdSql.execute(f"insert into sta4 values(1537146000001, 41, 410)")
+        tdSql.execute(f"insert into sta4 values(1537146000002, 42, 420)")
+        tdSql.execute(f"insert into sta4 values(1537146000003, 43, 430)")
+
+        tdSql.execute(f'''create table stb(ts timestamp, col1 int, col2 bigint) tags(tg1 int, tg2 binary(20))''')
+        tdSql.execute(f"create table stb1 using stb tags(1, 'a')")
+        tdSql.execute(f"create table stb2 using stb tags(2, 'b')")
+        tdSql.execute(f"create table stb3 using stb tags(3, 'c')")
+        tdSql.execute(f"create table stb4 using stb tags(4, 'a')")
+        tdSql.execute(f"insert into stb1 values(1537146000001, 911, 9110)")
+        tdSql.execute(f"insert into stb1 values(1537146000002, 912, 9120)")
+        tdSql.execute(f"insert into stb1 values(1537146000003, 913, 9130)")
+        tdSql.execute(f"insert into stb2 values(1537146000001, 921, 9210)")
+        tdSql.execute(f"insert into stb2 values(1537146000002, 922, 9220)")
+        tdSql.execute(f"insert into stb2 values(1537146000003, 923, 9230)")
+        tdSql.execute(f"insert into stb3 values(1537146000001, 931, 9310)")
+        tdSql.execute(f"insert into stb3 values(1537146000002, 932, 9320)")
+        tdSql.execute(f"insert into stb3 values(1537146000003, 933, 9330)")
+        tdSql.execute(f"insert into stb4 values(1537146000001, 941, 9410)")
+        tdSql.execute(f"insert into stb4 values(1537146000002, 942, 9420)")
+        tdSql.execute(f"insert into stb4 values(1537146000003, 943, 9430)")
+
+        tdSql.query("select * from (select ts, col1 from sta partition by tbname) limit 2");
+        tdSql.checkRows(2)
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())