diff --git a/cmake/cmake.define b/cmake/cmake.define
index b5d5c6d957..1cc28ec6fd 100644
--- a/cmake/cmake.define
+++ b/cmake/cmake.define
@@ -97,10 +97,10 @@ ELSE ()
         SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GCC_COVERAGE_COMPILE_FLAGS} ${GCC_COVERAGE_LINK_FLAGS}")
     ENDIF ()
 
-    IF (${SANITIZER} MATCHES "true")
+    IF (${BUILD_SANITIZER})
         SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS}     -Werror -Werror=return-type -fPIC -gdwarf-2 -fsanitize=address -fsanitize=undefined -fsanitize-recover=all -fsanitize=float-divide-by-zero -fsanitize=float-cast-overflow -fno-sanitize=shift-base -fno-sanitize=alignment -g3 -Wformat=0")
         SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror -Wno-literal-suffix -Werror=return-type -fPIC -gdwarf-2 -fsanitize=address -fsanitize=undefined -fsanitize-recover=all -fsanitize=float-divide-by-zero -fsanitize=float-cast-overflow -fno-sanitize=shift-base -fno-sanitize=alignment -g3 -Wformat=0")
-	MESSAGE(STATUS "Will compile with Address Sanitizer!")
+	      MESSAGE(STATUS "Will compile with Address Sanitizer!")
     ELSE ()
         SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Werror -Werror=return-type -fPIC -gdwarf-2 -g3 -Wformat=0")
         SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror -Wno-literal-suffix -Werror=return-type -fPIC -gdwarf-2 -g3 -Wformat=0")
diff --git a/cmake/cmake.options b/cmake/cmake.options
index 09236a5b87..e013ff7592 100644
--- a/cmake/cmake.options
+++ b/cmake/cmake.options
@@ -77,6 +77,12 @@ ELSE ()
     ENDIF ()
 ENDIF ()
 
+option(
+    BUILD_SANITIZER
+    "If build addr2line"
+    OFF
+    )
+
 option(
     BUILD_ADDR2LINE
     "If build addr2line"
diff --git a/docs/en/25-application/03-immigrate.md b/docs/en/25-application/03-immigrate.md
index 4d47aec1d7..fe67f97389 100644
--- a/docs/en/25-application/03-immigrate.md
+++ b/docs/en/25-application/03-immigrate.md
@@ -379,11 +379,11 @@ We still use the hypothetical environment from Chapter 4. There are three measur
 
 ### Storage resource estimation
 
-Assuming that the number of sensor devices that generate data and need to be stored is `n`, the frequency of data generation is `t` per second, and the length of each record is `L` bytes, the scale of data generated per day is `n * t * L` bytes. Assuming the compression ratio is `C`, the daily data size is `(n * t * L)/C` bytes. The storage resources are estimated to accommodate the data scale for 1.5 years. In the production environment, the compression ratio C of TDengine is generally between 5 and 7.
+Assuming that the number of sensor devices that generate data and need to be stored is `n`, the frequency of data generation is `t` per second, and the length of each record is `L` bytes, the scale of data generated per day is `86400 * n * t * L` bytes. Assuming the compression ratio is `C`, the daily data size is `(86400 * n * t * L)/C` bytes. The storage resources are estimated to accommodate the data scale for 1.5 years. In the production environment, the compression ratio C of TDengine is generally between 5 and 7.
 With additional 20% redundancy, you can calculate the required storage resources:
 
 ```matlab
-(n * t * L) * (365 * 1.5) * (1+20%)/C
+(86400 * n * t * L) * (365 * 1.5) * (1+20%)/C
 ````
 Substituting in the above formula, the raw data generated every year is 11.8TB without considering the label information. Note that tag information is associated with each timeline in TDengine, not every record. The amount of data to be recorded is somewhat reduced relative to the generated data, and label data can be ignored as a whole. Assuming a compression ratio of 5, the size of the retained data ends up being 2.56 TB.
 
diff --git a/docs/zh/25-application/03-immigrate.md b/docs/zh/25-application/03-immigrate.md
index 9d8946bc4a..d1c9caea09 100644
--- a/docs/zh/25-application/03-immigrate.md
+++ b/docs/zh/25-application/03-immigrate.md
@@ -367,10 +367,10 @@ WHERE ts>=1510560000 AND ts<=1515000009
 
 ### 存储资源估算
 
-假设产生数据并需要存储的传感器设备数量为 `n`，数据生成的频率为`t`条/秒，每条记录的长度为 `L` bytes，则每天产生的数据规模为 `n×t×L` bytes。假设压缩比为 C，则每日产生数据规模为 `(n×t×L)/C` bytes。存储资源预估为能够容纳 1.5 年的数据规模，生产环境下 TDengine 的压缩比 C 一般在 5 ~ 7 之间，同时为最后结果增加 20% 的冗余，可计算得到需要存储资源：
+假设产生数据并需要存储的传感器设备数量为 `n`，数据生成的频率为`t`条/秒，每条记录的长度为 `L` bytes，则每天产生的数据规模为 `86400×n×t×L` bytes。假设压缩比为 C，则每日产生数据规模为 `(86400×n×t×L)/C` bytes。存储资源预估为能够容纳 1.5 年的数据规模，生产环境下 TDengine 的压缩比 C 一般在 5 ~ 7 之间，同时为最后结果增加 20% 的冗余，可计算得到需要存储资源：
 
 ```matlab
-(n×t×L)×(365×1.5)×(1+20%)/C
+(86400×n×t×L)×(365×1.5)×(1+20%)/C
 ```
 
 结合以上的计算公式，将参数带入计算公式，在不考虑标签信息的情况下，每年产生的原始数据规模是 11.8TB。需要注意的是，由于标签信息在 TDengine 中关联到每个时间线，并不是每条记录。所以需要记录的数据量规模相对于产生的数据有一定的降低，而这部分标签数据整体上可以忽略不记。假设压缩比为 5，则保留的数据规模最终为 2.56 TB。
diff --git a/examples/c/tmq.c b/examples/c/tmq.c
index 89be847f8e..74efb4c026 100644
--- a/examples/c/tmq.c
+++ b/examples/c/tmq.c
@@ -241,7 +241,7 @@ int32_t create_topic() {
   taos_free_result(pRes);
 
   pRes = taos_query(pConn, "create topic topic_ctb_column with meta as database abc1");
-//  pRes = taos_query(pConn, "create topic topic_ctb_column as select ts, c1, c2, c3 from st1");
+  /*pRes = taos_query(pConn, "create topic topic_ctb_column as select ts, c1, c2, c3 from st1");*/
   if (taos_errno(pRes) != 0) {
     printf("failed to create topic topic_ctb_column, reason:%s\n", taos_errstr(pRes));
     return -1;
@@ -302,7 +302,7 @@ tmq_t* build_consumer() {
   tmq_conf_set(conf, "msg.with.table.name", "true");
   tmq_conf_set(conf, "enable.auto.commit", "true");
 
-  tmq_conf_set(conf, "experimental.snapshot.enable", "false");
+  /*tmq_conf_set(conf, "experimental.snapshot.enable", "true");*/
 
   tmq_conf_set_auto_commit_cb(conf, tmq_commit_cb_print, NULL);
   tmq_t* tmq = tmq_consumer_new(conf, NULL, 0);
diff --git a/include/common/tcommon.h b/include/common/tcommon.h
index 083ded8887..63167bd834 100644
--- a/include/common/tcommon.h
+++ b/include/common/tcommon.h
@@ -32,6 +32,18 @@ enum {
   TMQ_CONF__RESET_OFFSET__LATEST = -1,
 };
 
+// clang-format off
+#define IS_META_MSG(x) ( \
+     x == TDMT_VND_CREATE_STB     \
+  || x == TDMT_VND_ALTER_STB      \
+  || x == TDMT_VND_DROP_STB       \
+  || x == TDMT_VND_CREATE_TABLE   \
+  || x == TDMT_VND_ALTER_TABLE    \
+  || x == TDMT_VND_DROP_TABLE     \
+  || x == TDMT_VND_DROP_TTL_TABLE \
+)
+// clang-format on
+
 enum {
   TMQ_MSG_TYPE__DUMMY = 0,
   TMQ_MSG_TYPE__POLL_RSP,
@@ -105,6 +117,20 @@ typedef struct SSDataBlock {
   SDataBlockInfo   info;
 } SSDataBlock;
 
+enum {
+  FETCH_TYPE__DATA = 1,
+  FETCH_TYPE__META,
+  FETCH_TYPE__NONE,
+};
+
+typedef struct {
+  int8_t fetchType;
+  union {
+    SSDataBlock data;
+    void*       meta;
+  };
+} SFetchRet;
+
 typedef struct SVarColAttr {
   int32_t* offset;    // start position for each entry in the list
   uint32_t length;    // used buffer size that contain the valid data
diff --git a/include/common/tmsg.h b/include/common/tmsg.h
index 8988459637..49cee753d8 100644
--- a/include/common/tmsg.h
+++ b/include/common/tmsg.h
@@ -2826,8 +2826,8 @@ typedef struct {
 
 static FORCE_INLINE int32_t tEncodeSMqMetaRsp(void** buf, const SMqMetaRsp* pRsp) {
   int32_t tlen = 0;
-  tlen += taosEncodeFixedI64(buf, pRsp->reqOffset);
-  tlen += taosEncodeFixedI64(buf, pRsp->rspOffset);
+  // tlen += taosEncodeFixedI64(buf, pRsp->reqOffset);
+  // tlen += taosEncodeFixedI64(buf, pRsp->rspOffset);
   tlen += taosEncodeFixedI16(buf, pRsp->resMsgType);
   tlen += taosEncodeFixedI32(buf, pRsp->metaRspLen);
   tlen += taosEncodeBinary(buf, pRsp->metaRsp, pRsp->metaRspLen);
@@ -2835,8 +2835,8 @@ static FORCE_INLINE int32_t tEncodeSMqMetaRsp(void** buf, const SMqMetaRsp* pRsp
 }
 
 static FORCE_INLINE void* tDecodeSMqMetaRsp(const void* buf, SMqMetaRsp* pRsp) {
-  buf = taosDecodeFixedI64(buf, &pRsp->reqOffset);
-  buf = taosDecodeFixedI64(buf, &pRsp->rspOffset);
+  // buf = taosDecodeFixedI64(buf, &pRsp->reqOffset);
+  // buf = taosDecodeFixedI64(buf, &pRsp->rspOffset);
   buf = taosDecodeFixedI16(buf, &pRsp->resMsgType);
   buf = taosDecodeFixedI32(buf, &pRsp->metaRspLen);
   buf = taosDecodeBinary(buf, &pRsp->metaRsp, pRsp->metaRspLen);
diff --git a/include/libs/executor/executor.h b/include/libs/executor/executor.h
index 9d09861b8e..0094afef12 100644
--- a/include/libs/executor/executor.h
+++ b/include/libs/executor/executor.h
@@ -30,15 +30,15 @@ struct SRpcMsg;
 struct SSubplan;
 
 typedef struct SReadHandle {
-  void*   reader;
+  void*   tqReader;
   void*   meta;
   void*   config;
   void*   vnode;
   void*   mnd;
   SMsgCb* pMsgCb;
-
-//  int8_t  initTsdbReader;
-  bool    tqReader;
+  bool    initMetaReader;
+  bool    initTableReader;
+  bool    initTqReader;
 } SReadHandle;
 
 typedef enum {
@@ -52,7 +52,7 @@ typedef enum {
  * @param streamReadHandle
  * @return
  */
-qTaskInfo_t qCreateStreamExecTaskInfo(void* msg, void* streamReadHandle);
+qTaskInfo_t qCreateStreamExecTaskInfo(void* msg, SReadHandle* readers);
 
 /**
  * Switch the stream scan to snapshot mode
@@ -176,6 +176,9 @@ int32_t qGetStreamScanStatus(qTaskInfo_t tinfo, uint64_t* uid, int64_t* ts);
 
 int32_t qStreamPrepareScan(qTaskInfo_t tinfo, uint64_t uid, int64_t ts);
 
+void*   qExtractReaderFromStreamScanner(void* scanner);
+int32_t qExtractStreamScanner(qTaskInfo_t tinfo, void** scanner);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/include/libs/stream/tstream.h b/include/libs/stream/tstream.h
index 67074c789e..d6cb2c27b0 100644
--- a/include/libs/stream/tstream.h
+++ b/include/libs/stream/tstream.h
@@ -223,7 +223,7 @@ typedef struct {
   SEpSet  epSet;
 } SStreamChildEpInfo;
 
-struct SStreamTask {
+typedef struct SStreamTask {
   int64_t streamId;
   int32_t taskId;
   int8_t  isDataScan;
@@ -277,7 +277,7 @@ struct SStreamTask {
 
   // msg handle
   SMsgCb* pMsgCb;
-};
+} SStreamTask;
 
 int32_t tEncodeStreamEpInfo(SEncoder* pEncoder, const SStreamChildEpInfo* pInfo);
 int32_t tDecodeStreamEpInfo(SDecoder* pDecoder, SStreamChildEpInfo* pInfo);
@@ -288,6 +288,7 @@ int32_t      tDecodeSStreamTask(SDecoder* pDecoder, SStreamTask* pTask);
 void         tFreeSStreamTask(SStreamTask* pTask);
 
 static FORCE_INLINE int32_t streamTaskInput(SStreamTask* pTask, SStreamQueueItem* pItem) {
+#if 0
   while (1) {
     int8_t inputStatus =
         atomic_val_compare_exchange_8(&pTask->inputStatus, TASK_INPUT_STATUS__NORMAL, TASK_INPUT_STATUS__PROCESSING);
@@ -296,6 +297,7 @@ static FORCE_INLINE int32_t streamTaskInput(SStreamTask* pTask, SStreamQueueItem
     }
     ASSERT(0);
   }
+#endif
 
   if (pItem->type == STREAM_INPUT__DATA_SUBMIT) {
     SStreamDataSubmit* pSubmitClone = streamSubmitRefClone((SStreamDataSubmit*)pItem);
@@ -316,8 +318,10 @@ static FORCE_INLINE int32_t streamTaskInput(SStreamTask* pTask, SStreamQueueItem
     atomic_val_compare_exchange_8(&pTask->triggerStatus, TASK_TRIGGER_STATUS__IN_ACTIVE, TASK_TRIGGER_STATUS__ACTIVE);
   }
 
+#if 0
   // TODO: back pressure
   atomic_store_8(&pTask->inputStatus, TASK_INPUT_STATUS__NORMAL);
+#endif
   return 0;
 }
 
diff --git a/include/libs/wal/wal.h b/include/libs/wal/wal.h
index c11651970c..43792b5415 100644
--- a/include/libs/wal/wal.h
+++ b/include/libs/wal/wal.h
@@ -88,7 +88,7 @@ typedef struct {
   EWalType level;  // wal level
 } SWalCfg;
 
-typedef struct SWalVer {
+typedef struct {
   int64_t firstVer;
   int64_t verInSnapshotting;
   int64_t snapshotVer;
@@ -149,17 +149,22 @@ typedef struct SWal {
   SWalCkHead writeHead;
 } SWal;  // WAL HANDLE
 
-typedef struct SWalReadHandle {
-  SWal         *pWal;
-  TdFilePtr     pReadLogTFile;
-  TdFilePtr     pReadIdxTFile;
-  int64_t       curFileFirstVer;
-  int64_t       curVersion;
-  int64_t       capacity;
-  int64_t       status;  // if cursor valid
-  TdThreadMutex mutex;
-  SWalCkHead   *pHead;
-} SWalReadHandle;
+typedef struct {
+  int8_t scanUncommited;
+  int8_t scanMeta;
+} SWalFilterCond;
+
+typedef struct {
+  SWal          *pWal;
+  TdFilePtr      pLogFile;
+  TdFilePtr      pIdxFile;
+  int64_t        curFileFirstVer;
+  int64_t        curVersion;
+  int64_t        capacity;
+  TdThreadMutex  mutex;
+  SWalFilterCond cond;
+  SWalCkHead    *pHead;
+} SWalReader;
 
 // module initialization
 int32_t walInit();
@@ -178,7 +183,6 @@ void    walFsync(SWal *, bool force);
 
 // apis for lifecycle management
 int32_t walCommit(SWal *, int64_t ver);
-// truncate after
 int32_t walRollback(SWal *, int64_t ver);
 // notify that previous logs can be pruned safely
 int32_t walBeginSnapshot(SWal *, int64_t ver);
@@ -187,15 +191,16 @@ int32_t walRestoreFromSnapshot(SWal *, int64_t ver);
 // int32_t  walDataCorrupted(SWal*);
 
 // read
-SWalReadHandle *walOpenReadHandle(SWal *);
-void            walCloseReadHandle(SWalReadHandle *);
-int32_t         walReadWithHandle(SWalReadHandle *pRead, int64_t ver);
+SWalReader *walOpenReader(SWal *, SWalFilterCond *pCond);
+void        walCloseReader(SWalReader *pRead);
+int32_t     walReadVer(SWalReader *pRead, int64_t ver);
+int32_t     walNextValidMsg(SWalReader *pRead);
 
 // only for tq usage
-void    walSetReaderCapacity(SWalReadHandle *pRead, int32_t capacity);
-int32_t walFetchHead(SWalReadHandle *pRead, int64_t ver, SWalCkHead *pHead);
-int32_t walFetchBody(SWalReadHandle *pRead, SWalCkHead **ppHead);
-int32_t walSkipFetchBody(SWalReadHandle *pRead, const SWalCkHead *pHead);
+void    walSetReaderCapacity(SWalReader *pRead, int32_t capacity);
+int32_t walFetchHead(SWalReader *pRead, int64_t ver, SWalCkHead *pHead);
+int32_t walFetchBody(SWalReader *pRead, SWalCkHead **ppHead);
+int32_t walSkipFetchBody(SWalReader *pRead, const SWalCkHead *pHead);
 
 typedef struct {
   int64_t refId;
@@ -207,10 +212,11 @@ void     walCloseRef(SWalRef *);
 int32_t  walRefVer(SWalRef *, int64_t ver);
 int32_t  walUnrefVer(SWal *);
 
+// help function for raft
 bool walLogExist(SWal *, int64_t ver);
+bool walIsEmpty(SWal *);
 
 // lifecycle check
-bool    walIsEmpty(SWal *);
 int64_t walGetFirstVer(SWal *);
 int64_t walGetSnapshotVer(SWal *);
 int64_t walGetLastVer(SWal *);
diff --git a/include/util/tutil.h b/include/util/tutil.h
index 6a1a40f14c..2e96c5b88e 100644
--- a/include/util/tutil.h
+++ b/include/util/tutil.h
@@ -45,6 +45,7 @@ void     taosIp2String(uint32_t ip, char *str);
 void     taosIpPort2String(uint32_t ip, uint16_t port, char *str);
 
 void *tmemmem(const char *haystack, int hlen, const char *needle, int nlen);
+char *strDupUnquo(const char *src);
 
 static FORCE_INLINE void taosEncryptPass(uint8_t *inBuf, size_t inLen, char *target) {
   T_MD5_CTX context;
diff --git a/source/client/src/tmq.c b/source/client/src/tmq.c
index 1475663a05..2132f7a2d6 100644
--- a/source/client/src/tmq.c
+++ b/source/client/src/tmq.c
@@ -50,19 +50,18 @@ struct tmq_list_t {
 };
 
 struct tmq_conf_t {
-  char     clientId[256];
-  char     groupId[TSDB_CGROUP_LEN];
-  int8_t   autoCommit;
-  int8_t   resetOffset;
-  int8_t   withTbName;
-  int8_t   spEnable;
-  int32_t  spBatchSize;
-  uint16_t port;
-  int32_t  autoCommitInterval;
-  char*    ip;
-  char*    user;
-  char*    pass;
-  /*char*          db;*/
+  char           clientId[256];
+  char           groupId[TSDB_CGROUP_LEN];
+  int8_t         autoCommit;
+  int8_t         resetOffset;
+  int8_t         withTbName;
+  int8_t         spEnable;
+  int32_t        spBatchSize;
+  uint16_t       port;
+  int32_t        autoCommitInterval;
+  char*          ip;
+  char*          user;
+  char*          pass;
   tmq_commit_cb* commitCb;
   void*          commitCbUserParam;
 };
@@ -338,7 +337,7 @@ tmq_list_t* tmq_list_new() {
 
 int32_t tmq_list_append(tmq_list_t* list, const char* src) {
   SArray* container = &list->container;
-  char*   topic = strdup(src);
+  char*   topic = strDupUnquo(src);
   if (taosArrayPush(container, &topic) == NULL) return -1;
   return 0;
 }
diff --git a/source/dnode/mgmt/mgmt_mnode/src/mmHandle.c b/source/dnode/mgmt/mgmt_mnode/src/mmHandle.c
index d60b69daba..4e3449feb7 100644
--- a/source/dnode/mgmt/mgmt_mnode/src/mmHandle.c
+++ b/source/dnode/mgmt/mgmt_mnode/src/mmHandle.c
@@ -238,10 +238,12 @@ SArray *mmGetMsgHandles() {
   if (dmSetMgmtHandle(pArray, TDMT_SYNC_PING, mmPutMsgToSyncQueue, 1) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SYNC_PING_REPLY, mmPutMsgToSyncQueue, 1) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SYNC_CLIENT_REQUEST, mmPutMsgToSyncQueue, 1) == NULL) goto _OVER;
+  if (dmSetMgmtHandle(pArray, TDMT_SYNC_CLIENT_REQUEST_BATCH, mmPutMsgToSyncQueue, 1) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SYNC_CLIENT_REQUEST_REPLY, mmPutMsgToSyncQueue, 1) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SYNC_REQUEST_VOTE, mmPutMsgToSyncQueue, 1) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SYNC_REQUEST_VOTE_REPLY, mmPutMsgToSyncQueue, 1) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SYNC_APPEND_ENTRIES, mmPutMsgToSyncQueue, 1) == NULL) goto _OVER;
+  if (dmSetMgmtHandle(pArray, TDMT_SYNC_APPEND_ENTRIES_BATCH, mmPutMsgToSyncQueue, 1) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SYNC_APPEND_ENTRIES_REPLY, mmPutMsgToSyncQueue, 1) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SYNC_SNAPSHOT_SEND, mmPutMsgToSyncQueue, 1) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SYNC_SNAPSHOT_RSP, mmPutMsgToSyncQueue, 1) == NULL) goto _OVER;
diff --git a/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c b/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
index a3df32a08c..993a604b51 100644
--- a/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
+++ b/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
@@ -377,10 +377,12 @@ SArray *vmGetMsgHandles() {
   if (dmSetMgmtHandle(pArray, TDMT_SYNC_PING, vmPutMsgToSyncQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SYNC_PING_REPLY, vmPutMsgToSyncQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SYNC_CLIENT_REQUEST, vmPutMsgToSyncQueue, 0) == NULL) goto _OVER;
+  if (dmSetMgmtHandle(pArray, TDMT_SYNC_CLIENT_REQUEST_BATCH, vmPutMsgToSyncQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SYNC_CLIENT_REQUEST_REPLY, vmPutMsgToSyncQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SYNC_REQUEST_VOTE, vmPutMsgToSyncQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SYNC_REQUEST_VOTE_REPLY, vmPutMsgToSyncQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SYNC_APPEND_ENTRIES, vmPutMsgToSyncQueue, 0) == NULL) goto _OVER;
+  if (dmSetMgmtHandle(pArray, TDMT_SYNC_APPEND_ENTRIES_BATCH, vmPutMsgToSyncQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SYNC_APPEND_ENTRIES_REPLY, vmPutMsgToSyncQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SYNC_SET_VNODE_STANDBY, vmPutMsgToSyncQueue, 0) == NULL) goto _OVER;
 
diff --git a/source/dnode/vnode/inc/vnode.h b/source/dnode/vnode/inc/vnode.h
index 722087ea45..b381046ecf 100644
--- a/source/dnode/vnode/inc/vnode.h
+++ b/source/dnode/vnode/inc/vnode.h
@@ -64,8 +64,8 @@ int32_t vnodeSnapshotRead(SVSnapshotReader *pReader, const void **ppData, uint32
 int32_t vnodeProcessCreateTSma(SVnode *pVnode, void *pCont, uint32_t contLen);
 int32_t vnodeGetAllTableList(SVnode *pVnode, uint64_t uid, SArray *list);
 int32_t vnodeGetCtbIdList(SVnode *pVnode, int64_t suid, SArray *list);
-void *  vnodeGetIdx(SVnode *pVnode);
-void *  vnodeGetIvtIdx(SVnode *pVnode);
+void   *vnodeGetIdx(SVnode *pVnode);
+void   *vnodeGetIvtIdx(SVnode *pVnode);
 
 int32_t vnodeGetLoad(SVnode *pVnode, SVnodeLoad *pLoad);
 int32_t vnodeValidateTableHash(SVnode *pVnode, char *tableFName);
@@ -95,7 +95,7 @@ typedef struct SMetaFltParam {
   tb_uid_t suid;
   int16_t  cid;
   int16_t  type;
-  char *   val;
+  char    *val;
   bool     reverse;
   int (*filterFunc)(void *a, void *b, int16_t type);
 
@@ -136,8 +136,8 @@ SArray *tsdbRetrieveDataBlock(STsdbReader *pTsdbReadHandle, SArray *pColumnIdLis
 int32_t tsdbReaderReset(STsdbReader *pReader, SQueryTableDataCond *pCond, int32_t tWinIdx);
 int32_t tsdbGetFileBlocksDistInfo(STsdbReader *pReader, STableBlockDistInfo *pTableBlockInfo);
 int64_t tsdbGetNumOfRowsInMemTable(STsdbReader *pHandle);
-void *  tsdbGetIdx(SMeta *pMeta);
-void *  tsdbGetIvtIdx(SMeta *pMeta);
+void   *tsdbGetIdx(SMeta *pMeta);
+void   *tsdbGetIvtIdx(SMeta *pMeta);
 
 int32_t tsdbLastRowReaderOpen(void *pVnode, int32_t type, SArray *pTableIdList, int32_t *colId, int32_t numOfCols,
                               void **pReader);
@@ -146,19 +146,37 @@ int32_t tsdbLastrowReaderClose(void *pReader);
 
 // tq
 
-typedef struct STqReadHandle SStreamReader;
+typedef struct STqReader {
+  int64_t           ver;
+  const SSubmitReq *pMsg;
+  SSubmitBlk       *pBlock;
+  SSubmitMsgIter    msgIter;
+  SSubmitBlkIter    blkIter;
 
-SStreamReader *tqInitSubmitMsgScanner(SMeta *pMeta);
+  SWalReader *pWalReader;
 
-void    tqReadHandleSetColIdList(SStreamReader *pReadHandle, SArray *pColIdList);
-int32_t tqReadHandleSetTbUidList(SStreamReader *pHandle, const SArray *tbUidList);
-int32_t tqReadHandleAddTbUidList(SStreamReader *pHandle, const SArray *tbUidList);
-int32_t tqReadHandleRemoveTbUidList(SStreamReader *pHandle, const SArray *tbUidList);
+  SMeta    *pVnodeMeta;
+  SHashObj *tbIdHash;
+  SArray   *pColIdList;  // SArray<int16_t>
 
-int32_t tqReadHandleSetMsg(SStreamReader *pHandle, SSubmitReq *pMsg, int64_t ver);
-bool    tqNextDataBlock(SStreamReader *pHandle);
-bool    tqNextDataBlockFilterOut(SStreamReader *pHandle, SHashObj *filterOutUids);
-int32_t tqRetrieveDataBlock(SSDataBlock *pBlock, SStreamReader *pHandle);
+  int32_t         cachedSchemaVer;
+  int64_t         cachedSchemaSuid;
+  SSchemaWrapper *pSchemaWrapper;
+  STSchema       *pSchema;
+} STqReader;
+
+STqReader *tqOpenReader(SVnode *pVnode);
+void       tqCloseReader(STqReader *);
+
+void    tqReaderSetColIdList(STqReader *pReader, SArray *pColIdList);
+int32_t tqReaderSetTbUidList(STqReader *pReader, const SArray *tbUidList);
+int32_t tqReaderAddTbUidList(STqReader *pReader, const SArray *tbUidList);
+int32_t tqReaderRemoveTbUidList(STqReader *pReader, const SArray *tbUidList);
+
+int32_t tqReaderSetDataMsg(STqReader *pReader, SSubmitReq *pMsg, int64_t ver);
+bool    tqNextDataBlock(STqReader *pReader);
+bool    tqNextDataBlockFilterOut(STqReader *pReader, SHashObj *filterOutUids);
+int32_t tqRetrieveDataBlock(SSDataBlock *pBlock, STqReader *pReader);
 
 // sma
 int32_t smaGetTSmaDays(SVnodeCfg *pCfg, void *pCont, uint32_t contLen, int32_t *days);
@@ -214,7 +232,7 @@ struct SMetaEntry {
   int8_t   type;
   int8_t   flags;  // TODO: need refactor?
   tb_uid_t uid;
-  char *   name;
+  char    *name;
   union {
     struct {
       SSchemaWrapper schemaRow;
@@ -225,7 +243,7 @@ struct SMetaEntry {
       int64_t  ctime;
       int32_t  ttlDays;
       int32_t  commentLen;
-      char *   comment;
+      char    *comment;
       tb_uid_t suid;
       uint8_t *pTags;
     } ctbEntry;
@@ -233,7 +251,7 @@ struct SMetaEntry {
       int64_t        ctime;
       int32_t        ttlDays;
       int32_t        commentLen;
-      char *         comment;
+      char          *comment;
       int32_t        ncid;  // next column id
       SSchemaWrapper schemaRow;
     } ntbEntry;
@@ -247,17 +265,17 @@ struct SMetaEntry {
 
 struct SMetaReader {
   int32_t    flags;
-  SMeta *    pMeta;
+  SMeta     *pMeta;
   SDecoder   coder;
   SMetaEntry me;
-  void *     pBuf;
+  void      *pBuf;
   int32_t    szBuf;
 };
 
 struct SMTbCursor {
-  TBC *       pDbc;
-  void *      pKey;
-  void *      pVal;
+  TBC        *pDbc;
+  void       *pKey;
+  void       *pVal;
   int32_t     kLen;
   int32_t     vLen;
   SMetaReader mr;
diff --git a/source/dnode/vnode/src/inc/tq.h b/source/dnode/vnode/src/inc/tq.h
index d10935c022..9c3bd85c71 100644
--- a/source/dnode/vnode/src/inc/tq.h
+++ b/source/dnode/vnode/src/inc/tq.h
@@ -40,38 +40,10 @@ extern "C" {
 #define tqDebug(...) do { if (tqDebugFlag & DEBUG_DEBUG) { taosPrintLog("TQ  ", DEBUG_DEBUG, tqDebugFlag, __VA_ARGS__); }} while(0)
 #define tqTrace(...) do { if (tqDebugFlag & DEBUG_TRACE) { taosPrintLog("TQ  ", DEBUG_TRACE, tqDebugFlag, __VA_ARGS__); }} while(0)
 
-#define IS_META_MSG(x) ( \
-     x == TDMT_VND_CREATE_STB     \
-  || x == TDMT_VND_ALTER_STB      \
-  || x == TDMT_VND_DROP_STB       \
-  || x == TDMT_VND_CREATE_TABLE   \
-  || x == TDMT_VND_ALTER_TABLE    \
-  || x == TDMT_VND_DROP_TABLE     \
-  || x == TDMT_VND_DROP_TTL_TABLE \
-)
 // clang-format on
 
 typedef struct STqOffsetStore STqOffsetStore;
 
-// tqRead
-
-struct STqReadHandle {
-  int64_t           ver;
-  const SSubmitReq* pMsg;
-  SSubmitBlk*       pBlock;
-  SSubmitMsgIter    msgIter;
-  SSubmitBlkIter    blkIter;
-
-  SMeta*    pVnodeMeta;
-  SHashObj* tbIdHash;
-  SArray*   pColIdList;  // SArray<int16_t>
-
-  int32_t         cachedSchemaVer;
-  int64_t         cachedSchemaSuid;
-  SSchemaWrapper* pSchemaWrapper;
-  STSchema*       pSchema;
-};
-
 // tqPush
 
 typedef struct {
@@ -111,7 +83,7 @@ typedef struct {
 typedef struct {
   int8_t subType;
 
-  SStreamReader* pExecReader[5];
+  STqReader* pExecReader[5];
   union {
     STqExecCol execCol;
     STqExecTb  execTb;
@@ -127,8 +99,8 @@ typedef struct {
   int32_t epoch;
   int8_t  fetchMeta;
 
-  // reader
-  SWalReadHandle* pWalReader;
+  // TODO remove
+  SWalReader* pWalReader;
 
   // push
   STqPushHandle pushHandle;
diff --git a/source/dnode/vnode/src/meta/metaQuery.c b/source/dnode/vnode/src/meta/metaQuery.c
index a198f52bee..db959a83b0 100644
--- a/source/dnode/vnode/src/meta/metaQuery.c
+++ b/source/dnode/vnode/src/meta/metaQuery.c
@@ -439,6 +439,7 @@ int32_t metaGetTbTSchemaEx(SMeta *pMeta, tb_uid_t suid, tb_uid_t uid, int32_t sv
   tDecoderInit(&dc, pData, nData);
   tDecodeSSchemaWrapper(&dc, pSchemaWrapper);
   tDecoderClear(&dc);
+  tdbFree(pData);
 
   // convert
   STSchemaBuilder sb = {0};
diff --git a/source/dnode/vnode/src/meta/metaTable.c b/source/dnode/vnode/src/meta/metaTable.c
index 74076d323c..341173103c 100644
--- a/source/dnode/vnode/src/meta/metaTable.c
+++ b/source/dnode/vnode/src/meta/metaTable.c
@@ -16,6 +16,7 @@
 #include "meta.h"
 
 static int metaSaveJsonVarToIdx(SMeta *pMeta, const SMetaEntry *pCtbEntry, const SSchema *pSchema);
+static int metaDelJsonVarFromIdx(SMeta *pMeta, const SMetaEntry *pCtbEntry, const SSchema *pSchema);
 static int metaHandleEntry(SMeta *pMeta, const SMetaEntry *pME);
 static int metaSaveToTbDb(SMeta *pMeta, const SMetaEntry *pME);
 static int metaUpdateUidIdx(SMeta *pMeta, const SMetaEntry *pME);
@@ -92,7 +93,65 @@ static int metaSaveJsonVarToIdx(SMeta *pMeta, const SMetaEntry *pCtbEntry, const
     } else if (type == TSDB_DATA_TYPE_BOOL) {
       int val = *(int *)(&pTagVal->i64);
       int len = sizeof(val);
-      term = indexTermCreate(suid, ADD_VALUE, TSDB_DATA_TYPE_INT, key, nKey, (const char *)&val, len);
+      term = indexTermCreate(suid, ADD_VALUE, TSDB_DATA_TYPE_BOOL, key, nKey, (const char *)&val, len);
+    }
+    if (term != NULL) {
+      indexMultiTermAdd(terms, term);
+    }
+  }
+  indexJsonPut(pMeta->pTagIvtIdx, terms, tuid);
+  indexMultiTermDestroy(terms);
+#endif
+  return 0;
+}
+int metaDelJsonVarFromIdx(SMeta *pMeta, const SMetaEntry *pCtbEntry, const SSchema *pSchema) {
+#ifdef USE_INVERTED_INDEX
+  if (pMeta->pTagIvtIdx == NULL || pCtbEntry == NULL) {
+    return -1;
+  }
+  void *      data = pCtbEntry->ctbEntry.pTags;
+  const char *tagName = pSchema->name;
+
+  tb_uid_t    suid = pCtbEntry->ctbEntry.suid;
+  tb_uid_t    tuid = pCtbEntry->uid;
+  const void *pTagData = pCtbEntry->ctbEntry.pTags;
+  int32_t     nTagData = 0;
+
+  SArray *pTagVals = NULL;
+  if (tTagToValArray((const STag *)data, &pTagVals) != 0) {
+    return -1;
+  }
+
+  SIndexMultiTerm *terms = indexMultiTermCreate();
+  int16_t          nCols = taosArrayGetSize(pTagVals);
+  for (int i = 0; i < nCols; i++) {
+    STagVal *pTagVal = (STagVal *)taosArrayGet(pTagVals, i);
+    char     type = pTagVal->type;
+
+    char *  key = pTagVal->pKey;
+    int32_t nKey = strlen(key);
+
+    SIndexTerm *term = NULL;
+    if (type == TSDB_DATA_TYPE_NULL) {
+      term = indexTermCreate(suid, DEL_VALUE, TSDB_DATA_TYPE_VARCHAR, key, nKey, NULL, 0);
+    } else if (type == TSDB_DATA_TYPE_NCHAR) {
+      if (pTagVal->nData > 0) {
+        char *  val = taosMemoryCalloc(1, pTagVal->nData + VARSTR_HEADER_SIZE);
+        int32_t len = taosUcs4ToMbs((TdUcs4 *)pTagVal->pData, pTagVal->nData, val + VARSTR_HEADER_SIZE);
+        memcpy(val, (uint16_t *)&len, VARSTR_HEADER_SIZE);
+        type = TSDB_DATA_TYPE_VARCHAR;
+        term = indexTermCreate(suid, DEL_VALUE, type, key, nKey, val, len);
+      } else if (pTagVal->nData == 0) {
+        term = indexTermCreate(suid, DEL_VALUE, TSDB_DATA_TYPE_VARCHAR, key, nKey, pTagVal->pData, 0);
+      }
+    } else if (type == TSDB_DATA_TYPE_DOUBLE) {
+      double val = *(double *)(&pTagVal->i64);
+      int    len = sizeof(val);
+      term = indexTermCreate(suid, DEL_VALUE, type, key, nKey, (const char *)&val, len);
+    } else if (type == TSDB_DATA_TYPE_BOOL) {
+      int val = *(int *)(&pTagVal->i64);
+      int len = sizeof(val);
+      term = indexTermCreate(suid, DEL_VALUE, TSDB_DATA_TYPE_BOOL, key, nKey, (const char *)&val, len);
     }
     if (term != NULL) {
       indexMultiTermAdd(terms, term);
@@ -434,9 +493,33 @@ static int metaDropTableByUid(SMeta *pMeta, tb_uid_t uid, int *type) {
 
   if (type) *type = e.type;
 
+  if (e.type == TSDB_CHILD_TABLE) {
+    void *tData = NULL;
+    int   tLen = 0;
+
+    if (tdbTbGet(pMeta->pUidIdx, &e.ctbEntry.suid, sizeof(tb_uid_t), &tData, &tLen) == 0) {
+      version = *(int64_t *)tData;
+      STbDbKey tbDbKey = {.uid = e.ctbEntry.suid, .version = version};
+      if (tdbTbGet(pMeta->pTbDb, &tbDbKey, sizeof(tbDbKey), &tData, &tLen) == 0) {
+        SDecoder   tdc = {0};
+        SMetaEntry stbEntry = {0};
+
+        tDecoderInit(&tdc, tData, tLen);
+        metaDecodeEntry(&tdc, &stbEntry);
+        const SSchema *pTagColumn = &stbEntry.stbEntry.schemaTag.pSchema[0];
+        if (pTagColumn->type == TSDB_DATA_TYPE_JSON) {
+          metaDelJsonVarFromIdx(pMeta, &e, pTagColumn);
+        }
+        tDecoderClear(&tdc);
+      }
+      tdbFree(tData);
+    }
+  }
+
   tdbTbDelete(pMeta->pTbDb, &(STbDbKey){.version = version, .uid = uid}, sizeof(STbDbKey), &pMeta->txn);
   tdbTbDelete(pMeta->pNameIdx, e.name, strlen(e.name) + 1, &pMeta->txn);
   tdbTbDelete(pMeta->pUidIdx, &uid, sizeof(uid), &pMeta->txn);
+
   if (e.type != TSDB_SUPER_TABLE) metaDeleteTtlIdx(pMeta, &e);
 
   if (e.type == TSDB_CHILD_TABLE) {
diff --git a/source/dnode/vnode/src/sma/smaRollup.c b/source/dnode/vnode/src/sma/smaRollup.c
index ff6915156c..6f87c01be1 100644
--- a/source/dnode/vnode/src/sma/smaRollup.c
+++ b/source/dnode/vnode/src/sma/smaRollup.c
@@ -277,6 +277,8 @@ static int32_t tdSetRSmaInfoItemParams(SSma *pSma, SRSmaParam *param, SRSmaInfo
       pItem->maxDelay = TSDB_MAX_ROLLUP_MAX_DELAY;
     }
     pItem->level = (idx == 0 ? TSDB_RETENTION_L1 : TSDB_RETENTION_L2);
+    smaInfo("vgId:%d table:%" PRIi64 " level:%" PRIi8 " maxdelay:%" PRIi64 " watermark:%" PRIi64 ", finally maxdelay:%"PRIi32, SMA_VID(pSma),
+            pRSmaInfo->suid, idx + 1, param->maxdelay[idx], param->watermark[idx], pItem->maxDelay);
   }
   return TSDB_CODE_SUCCESS;
 _err:
@@ -325,14 +327,14 @@ int32_t tdProcessRSmaCreateImpl(SSma *pSma, SRSmaParam *param, int64_t suid, con
     return TSDB_CODE_FAILED;
   }
 
-  SStreamReader *pReadHandle = tqInitSubmitMsgScanner(pMeta);
-  if (!pReadHandle) {
+  STqReader *pReader = tqOpenReader(pVnode);
+  if (!pReader) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     goto _err;
   }
 
   SReadHandle handle = {
-      .reader = pReadHandle,
+      .tqReader = pReader,
       .meta = pMeta,
       .pMsgCb = pMsgCb,
       .vnode = pVnode,
@@ -364,7 +366,7 @@ int32_t tdProcessRSmaCreateImpl(SSma *pSma, SRSmaParam *param, int64_t suid, con
   return TSDB_CODE_SUCCESS;
 _err:
   tdFreeRSmaInfo(pRSmaInfo);
-  taosMemoryFree(pReadHandle);
+  taosMemoryFree(pReader);
   return TSDB_CODE_FAILED;
 }
 
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index 739c063f5a..e21b0fe9e8 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -28,8 +28,12 @@ int32_t tqInit() {
       atomic_store_8(&tqMgmt.inited, 0);
       return -1;
     }
+    if (streamInit() < 0) {
+      return -1;
+    }
     atomic_store_8(&tqMgmt.inited, 1);
   }
+
   return 0;
 }
 
@@ -42,6 +46,7 @@ void tqCleanUp() {
 
   if (old == 1) {
     taosTmrCleanUp(tqMgmt.timer);
+    streamCleanUp();
     atomic_store_8(&tqMgmt.inited, 0);
   }
 }
@@ -144,7 +149,6 @@ int32_t tqSendDataRsp(STQ* pTq, const SRpcMsg* pMsg, const SMqPollReq* pReq, con
   SEncoder encoder;
   tEncoderInit(&encoder, abuf, len);
   tEncodeSMqDataRsp(&encoder, pRsp);
-  /*tEncodeSMqDataBlkRsp(&abuf, pRsp);*/
 
   SRpcMsg rsp = {
       .info = pMsg->info,
@@ -361,8 +365,11 @@ int32_t tqProcessPollReq(STQ* pTq, SRpcMsg* pMsg, int32_t workerId) {
         ASSERT(IS_META_MSG(pHead->msgType));
         tqInfo("fetch meta msg, ver: %ld, type: %d", pHead->version, pHead->msgType);
         SMqMetaRsp metaRsp = {0};
-        metaRsp.reqOffset = pReq->reqOffset.version;
-        metaRsp.rspOffset = fetchVer;
+        /*metaRsp.reqOffset = pReq->reqOffset.version;*/
+        /*metaRsp.rspOffset = fetchVer;*/
+        /*metaRsp.rspOffsetNew.version = fetchVer;*/
+        tqOffsetResetToLog(&metaRsp.reqOffsetNew, pReq->reqOffset.version);
+        tqOffsetResetToLog(&metaRsp.rspOffsetNew, fetchVer);
         metaRsp.resMsgType = pHead->msgType;
         metaRsp.metaRspLen = pHead->bodyLen;
         metaRsp.metaRsp = pHead->body;
@@ -439,27 +446,39 @@ int32_t tqProcessVgChangeReq(STQ* pTq, char* msg, int32_t msgLen) {
     pHandle->execHandle.subType = req.subType;
     pHandle->fetchMeta = req.withMeta;
 
-    pHandle->pWalReader = walOpenReadHandle(pTq->pVnode->pWal);
-    for (int32_t i = 0; i < 5; i++) {
-      pHandle->execHandle.pExecReader[i] = tqInitSubmitMsgScanner(pTq->pVnode->pMeta);
-    }
+    pHandle->pWalReader = walOpenReader(pTq->pVnode->pWal, NULL);
+    /*for (int32_t i = 0; i < 5; i++) {*/
+    /*pHandle->execHandle.pExecReader[i] = tqOpenReader(pTq->pVnode);*/
+    /*}*/
     if (pHandle->execHandle.subType == TOPIC_SUB_TYPE__COLUMN) {
       pHandle->execHandle.execCol.qmsg = req.qmsg;
       req.qmsg = NULL;
       for (int32_t i = 0; i < 5; i++) {
         SReadHandle handle = {
-            .reader = pHandle->execHandle.pExecReader[i],
+            .tqReader = pHandle->execHandle.pExecReader[i],
             .meta = pTq->pVnode->pMeta,
             .vnode = pTq->pVnode,
-            .tqReader = true,
+            .initTableReader = true,
+            .initTqReader = true,
         };
         pHandle->execHandle.execCol.task[i] = qCreateStreamExecTaskInfo(pHandle->execHandle.execCol.qmsg, &handle);
         ASSERT(pHandle->execHandle.execCol.task[i]);
+        void* scanner = NULL;
+        qExtractStreamScanner(pHandle->execHandle.execCol.task[i], &scanner);
+        ASSERT(scanner);
+        pHandle->execHandle.pExecReader[i] = qExtractReaderFromStreamScanner(scanner);
+        ASSERT(pHandle->execHandle.pExecReader[i]);
       }
     } else if (pHandle->execHandle.subType == TOPIC_SUB_TYPE__DB) {
+      for (int32_t i = 0; i < 5; i++) {
+        pHandle->execHandle.pExecReader[i] = tqOpenReader(pTq->pVnode);
+      }
       pHandle->execHandle.execDb.pFilterOutTbUid =
           taosHashInit(64, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BIGINT), false, HASH_NO_LOCK);
     } else if (pHandle->execHandle.subType == TOPIC_SUB_TYPE__TABLE) {
+      for (int32_t i = 0; i < 5; i++) {
+        pHandle->execHandle.pExecReader[i] = tqOpenReader(pTq->pVnode);
+      }
       pHandle->execHandle.execTb.suid = req.suid;
       SArray* tbUidList = taosArrayInit(0, sizeof(int64_t));
       vnodeGetCtbIdList(pTq->pVnode, req.suid, tbUidList);
@@ -469,7 +488,7 @@ int32_t tqProcessVgChangeReq(STQ* pTq, char* msg, int32_t msgLen) {
         tqDebug("vg %d, idx %d, uid: %ld", TD_VID(pTq->pVnode), i, tbUid);
       }
       for (int32_t i = 0; i < 5; i++) {
-        tqReadHandleSetTbUidList(pHandle->execHandle.pExecReader[i], tbUidList);
+        tqReaderSetTbUidList(pHandle->execHandle.pExecReader[i], tbUidList);
       }
       taosArrayDestroy(tbUidList);
     }
@@ -522,19 +541,16 @@ int32_t tqProcessTaskDeployReq(STQ* pTq, char* msg, int32_t msgLen) {
   if (pTask->execType != TASK_EXEC__NONE) {
     // expand runners
     if (pTask->isDataScan) {
-      SStreamReader* pStreamReader = tqInitSubmitMsgScanner(pTq->pVnode->pMeta);
-      SReadHandle    handle = {
-             .reader = pStreamReader,
-             .meta = pTq->pVnode->pMeta,
-             .vnode = pTq->pVnode,
+      SReadHandle handle = {
+          .meta = pTq->pVnode->pMeta,
+          .vnode = pTq->pVnode,
+          .initTqReader = 1,
       };
-      /*pTask->exec.inputHandle = pStreamReader;*/
       pTask->exec.executor = qCreateStreamExecTaskInfo(pTask->exec.qmsg, &handle);
-      ASSERT(pTask->exec.executor);
     } else {
       pTask->exec.executor = qCreateStreamExecTaskInfo(pTask->exec.qmsg, NULL);
-      ASSERT(pTask->exec.executor);
     }
+    ASSERT(pTask->exec.executor);
   }
 
   // sink
diff --git a/source/dnode/vnode/src/tq/tqExec.c b/source/dnode/vnode/src/tq/tqExec.c
index 9dd2a0258f..16822e6003 100644
--- a/source/dnode/vnode/src/tq/tqExec.c
+++ b/source/dnode/vnode/src/tq/tqExec.c
@@ -135,8 +135,8 @@ int32_t tqLogScanExec(STQ* pTq, STqExecHandle* pExec, SSubmitReq* pReq, SMqDataR
     }
   } else if (pExec->subType == TOPIC_SUB_TYPE__TABLE) {
     pRsp->withSchema = 1;
-    SStreamReader* pReader = pExec->pExecReader[workerId];
-    tqReadHandleSetMsg(pReader, pReq, 0);
+    STqReader* pReader = pExec->pExecReader[workerId];
+    tqReaderSetDataMsg(pReader, pReq, 0);
     while (tqNextDataBlock(pReader)) {
       SSDataBlock block = {0};
       if (tqRetrieveDataBlock(&block, pReader) < 0) {
@@ -153,8 +153,8 @@ int32_t tqLogScanExec(STQ* pTq, STqExecHandle* pExec, SSubmitReq* pReq, SMqDataR
     }
   } else if (pExec->subType == TOPIC_SUB_TYPE__DB) {
     pRsp->withSchema = 1;
-    SStreamReader* pReader = pExec->pExecReader[workerId];
-    tqReadHandleSetMsg(pReader, pReq, 0);
+    STqReader* pReader = pExec->pExecReader[workerId];
+    tqReaderSetDataMsg(pReader, pReq, 0);
     while (tqNextDataBlockFilterOut(pReader, pExec->execDb.pFilterOutTbUid)) {
       SSDataBlock block = {0};
       if (tqRetrieveDataBlock(&block, pReader) < 0) {
diff --git a/source/dnode/vnode/src/tq/tqMeta.c b/source/dnode/vnode/src/tq/tqMeta.c
index b262715cdd..67fa4ed166 100644
--- a/source/dnode/vnode/src/tq/tqMeta.c
+++ b/source/dnode/vnode/src/tq/tqMeta.c
@@ -77,14 +77,14 @@ int32_t tqMetaOpen(STQ* pTq) {
     STqHandle handle;
     tDecoderInit(&decoder, (uint8_t*)pVal, vLen);
     tDecodeSTqHandle(&decoder, &handle);
-    handle.pWalReader = walOpenReadHandle(pTq->pVnode->pWal);
+    handle.pWalReader = walOpenReader(pTq->pVnode->pWal, NULL);
     for (int32_t i = 0; i < 5; i++) {
-      handle.execHandle.pExecReader[i] = tqInitSubmitMsgScanner(pTq->pVnode->pMeta);
+      handle.execHandle.pExecReader[i] = tqOpenReader(pTq->pVnode);
     }
     if (handle.execHandle.subType == TOPIC_SUB_TYPE__COLUMN) {
       for (int32_t i = 0; i < 5; i++) {
         SReadHandle reader = {
-            .reader = handle.execHandle.pExecReader[i],
+            .tqReader = handle.execHandle.pExecReader[i],
             .meta = pTq->pVnode->pMeta,
             .pMsgCb = &pTq->pVnode->msgCb,
             .vnode = pTq->pVnode,
diff --git a/source/dnode/vnode/src/tq/tqRead.c b/source/dnode/vnode/src/tq/tqRead.c
index bc992b2211..53ef17a6ba 100644
--- a/source/dnode/vnode/src/tq/tqRead.c
+++ b/source/dnode/vnode/src/tq/tqRead.c
@@ -15,6 +15,11 @@
 
 #include "tq.h"
 
+int64_t tqScanLog(STQ* pTq, const STqExecHandle* pExec, SMqDataRsp* pRsp, STqOffsetVal offset) {
+  /*if ()*/
+  return 0;
+}
+
 int64_t tqFetchLog(STQ* pTq, STqHandle* pHandle, int64_t* fetchOffset, SWalCkHead** ppCkHead) {
   int32_t code = 0;
   taosThreadMutexLock(&pHandle->pWalReader->mutex);
@@ -73,53 +78,107 @@ END:
   return code;
 }
 
-SStreamReader* tqInitSubmitMsgScanner(SMeta* pMeta) {
-  SStreamReader* pReadHandle = taosMemoryMalloc(sizeof(SStreamReader));
-  if (pReadHandle == NULL) {
+STqReader* tqOpenReader(SVnode* pVnode) {
+  STqReader* pReader = taosMemoryMalloc(sizeof(STqReader));
+  if (pReader == NULL) {
     return NULL;
   }
-  pReadHandle->pVnodeMeta = pMeta;
-  pReadHandle->pMsg = NULL;
-  pReadHandle->ver = -1;
-  pReadHandle->pColIdList = NULL;
-  pReadHandle->cachedSchemaVer = 0;
-  pReadHandle->cachedSchemaSuid = 0;
-  pReadHandle->pSchema = NULL;
-  pReadHandle->pSchemaWrapper = NULL;
-  pReadHandle->tbIdHash = NULL;
-  return pReadHandle;
+
+  // TODO open
+  /*pReader->pWalReader = walOpenReader(pVnode->pWal, NULL);*/
+
+  pReader->pVnodeMeta = pVnode->pMeta;
+  pReader->pMsg = NULL;
+  pReader->ver = -1;
+  pReader->pColIdList = NULL;
+  pReader->cachedSchemaVer = 0;
+  pReader->cachedSchemaSuid = 0;
+  pReader->pSchema = NULL;
+  pReader->pSchemaWrapper = NULL;
+  pReader->tbIdHash = NULL;
+  return pReader;
 }
 
-int32_t tqReadHandleSetMsg(SStreamReader* pReadHandle, SSubmitReq* pMsg, int64_t ver) {
-  pReadHandle->pMsg = pMsg;
+void tqCloseReader(STqReader* pReader) {
+  // close wal reader
+  // free cached schema
+  // free hash
+  taosMemoryFree(pReader);
+}
 
-  if (tInitSubmitMsgIter(pMsg, &pReadHandle->msgIter) < 0) return -1;
+int32_t tqNextBlock(STqReader* pReader, SFetchRet* ret) {
+  bool fromProcessedMsg = pReader->pMsg != NULL;
+
+  while (1) {
+    if (!fromProcessedMsg) {
+      if (walNextValidMsg(pReader->pWalReader) < 0) {
+        ret->fetchType = FETCH_TYPE__NONE;
+        return -1;
+      }
+      void* body = pReader->pWalReader->pHead->head.body;
+      if (pReader->pWalReader->pHead->head.msgType != TDMT_VND_SUBMIT) {
+        // TODO do filter
+        ret->fetchType = FETCH_TYPE__META;
+        ret->meta = pReader->pWalReader->pHead->head.body;
+        return 0;
+      } else {
+        tqReaderSetDataMsg(pReader, body, pReader->pWalReader->pHead->head.version);
+      }
+    }
+
+    while (tqNextDataBlock(pReader)) {
+      memset(&ret->data, 0, sizeof(SSDataBlock));
+      int32_t code = tqRetrieveDataBlock(&ret->data, pReader);
+      if (code != 0 || ret->data.info.rows == 0) {
+        if (fromProcessedMsg) {
+          ret->fetchType = FETCH_TYPE__NONE;
+          return 0;
+        } else {
+          break;
+        }
+      }
+
+      ret->fetchType = FETCH_TYPE__DATA;
+      return 0;
+    }
+
+    if (fromProcessedMsg) {
+      ret->fetchType = FETCH_TYPE__NONE;
+      return 0;
+    }
+  }
+}
+
+int32_t tqReaderSetDataMsg(STqReader* pReader, SSubmitReq* pMsg, int64_t ver) {
+  pReader->pMsg = pMsg;
+
+  if (tInitSubmitMsgIter(pMsg, &pReader->msgIter) < 0) return -1;
   while (true) {
-    if (tGetSubmitMsgNext(&pReadHandle->msgIter, &pReadHandle->pBlock) < 0) return -1;
-    if (pReadHandle->pBlock == NULL) break;
+    if (tGetSubmitMsgNext(&pReader->msgIter, &pReader->pBlock) < 0) return -1;
+    if (pReader->pBlock == NULL) break;
   }
 
-  if (tInitSubmitMsgIter(pMsg, &pReadHandle->msgIter) < 0) return -1;
-  pReadHandle->ver = ver;
-  memset(&pReadHandle->blkIter, 0, sizeof(SSubmitBlkIter));
+  if (tInitSubmitMsgIter(pMsg, &pReader->msgIter) < 0) return -1;
+  pReader->ver = ver;
+  memset(&pReader->blkIter, 0, sizeof(SSubmitBlkIter));
   return 0;
 }
 
-bool tqNextDataBlock(SStreamReader* pHandle) {
-  if (pHandle->pMsg == NULL) return false;
+bool tqNextDataBlock(STqReader* pReader) {
+  if (pReader->pMsg == NULL) return false;
   while (1) {
-    if (tGetSubmitMsgNext(&pHandle->msgIter, &pHandle->pBlock) < 0) {
+    if (tGetSubmitMsgNext(&pReader->msgIter, &pReader->pBlock) < 0) {
       return false;
     }
-    if (pHandle->pBlock == NULL) {
-      pHandle->pMsg = NULL;
+    if (pReader->pBlock == NULL) {
+      pReader->pMsg = NULL;
       return false;
     }
 
-    if (pHandle->tbIdHash == NULL) {
+    if (pReader->tbIdHash == NULL) {
       return true;
     }
-    void* ret = taosHashGet(pHandle->tbIdHash, &pHandle->msgIter.uid, sizeof(int64_t));
+    void* ret = taosHashGet(pReader->tbIdHash, &pReader->msgIter.uid, sizeof(int64_t));
     /*tqDebug("search uid %ld", pHandle->msgIter.uid);*/
     if (ret != NULL) {
       /*tqDebug("find   uid %ld", pHandle->msgIter.uid);*/
@@ -129,7 +188,7 @@ bool tqNextDataBlock(SStreamReader* pHandle) {
   return false;
 }
 
-bool tqNextDataBlockFilterOut(SStreamReader* pHandle, SHashObj* filterOutUids) {
+bool tqNextDataBlockFilterOut(STqReader* pHandle, SHashObj* filterOutUids) {
   while (1) {
     if (tGetSubmitMsgNext(&pHandle->msgIter, &pHandle->pBlock) < 0) {
       return false;
@@ -145,38 +204,38 @@ bool tqNextDataBlockFilterOut(SStreamReader* pHandle, SHashObj* filterOutUids) {
   return false;
 }
 
-int32_t tqRetrieveDataBlock(SSDataBlock* pBlock, SStreamReader* pHandle) {
+int32_t tqRetrieveDataBlock(SSDataBlock* pBlock, STqReader* pReader) {
   // TODO: cache multiple schema
-  int32_t sversion = htonl(pHandle->pBlock->sversion);
-  if (pHandle->cachedSchemaSuid == 0 || pHandle->cachedSchemaVer != sversion ||
-      pHandle->cachedSchemaSuid != pHandle->msgIter.suid) {
-    if (pHandle->pSchema) taosMemoryFree(pHandle->pSchema);
-    pHandle->pSchema = metaGetTbTSchema(pHandle->pVnodeMeta, pHandle->msgIter.uid, sversion);
-    if (pHandle->pSchema == NULL) {
+  int32_t sversion = htonl(pReader->pBlock->sversion);
+  if (pReader->cachedSchemaSuid == 0 || pReader->cachedSchemaVer != sversion ||
+      pReader->cachedSchemaSuid != pReader->msgIter.suid) {
+    if (pReader->pSchema) taosMemoryFree(pReader->pSchema);
+    pReader->pSchema = metaGetTbTSchema(pReader->pVnodeMeta, pReader->msgIter.uid, sversion);
+    if (pReader->pSchema == NULL) {
       tqWarn("cannot found tsschema for table: uid: %ld (suid: %ld), version %d, possibly dropped table",
-             pHandle->msgIter.uid, pHandle->msgIter.suid, pHandle->cachedSchemaVer);
+             pReader->msgIter.uid, pReader->msgIter.suid, pReader->cachedSchemaVer);
       /*ASSERT(0);*/
       terrno = TSDB_CODE_TQ_TABLE_SCHEMA_NOT_FOUND;
       return -1;
     }
 
-    if (pHandle->pSchemaWrapper) tDeleteSSchemaWrapper(pHandle->pSchemaWrapper);
-    pHandle->pSchemaWrapper = metaGetTableSchema(pHandle->pVnodeMeta, pHandle->msgIter.uid, sversion, true);
-    if (pHandle->pSchemaWrapper == NULL) {
+    if (pReader->pSchemaWrapper) tDeleteSSchemaWrapper(pReader->pSchemaWrapper);
+    pReader->pSchemaWrapper = metaGetTableSchema(pReader->pVnodeMeta, pReader->msgIter.uid, sversion, true);
+    if (pReader->pSchemaWrapper == NULL) {
       tqWarn("cannot found schema wrapper for table: suid: %ld, version %d, possibly dropped table",
-             pHandle->msgIter.uid, pHandle->cachedSchemaVer);
+             pReader->msgIter.uid, pReader->cachedSchemaVer);
       /*ASSERT(0);*/
       terrno = TSDB_CODE_TQ_TABLE_SCHEMA_NOT_FOUND;
       return -1;
     }
-    pHandle->cachedSchemaVer = sversion;
-    pHandle->cachedSchemaSuid = pHandle->msgIter.suid;
+    pReader->cachedSchemaVer = sversion;
+    pReader->cachedSchemaSuid = pReader->msgIter.suid;
   }
 
-  STSchema*       pTschema = pHandle->pSchema;
-  SSchemaWrapper* pSchemaWrapper = pHandle->pSchemaWrapper;
+  STSchema*       pTschema = pReader->pSchema;
+  SSchemaWrapper* pSchemaWrapper = pReader->pSchemaWrapper;
 
-  int32_t colNumNeed = taosArrayGetSize(pHandle->pColIdList);
+  int32_t colNumNeed = taosArrayGetSize(pReader->pColIdList);
 
   if (colNumNeed == 0) {
     int32_t colMeta = 0;
@@ -199,7 +258,7 @@ int32_t tqRetrieveDataBlock(SSDataBlock* pBlock, SStreamReader* pHandle) {
     while (colMeta < pSchemaWrapper->nCols && colNeed < colNumNeed) {
       SSchema* pColSchema = &pSchemaWrapper->pSchema[colMeta];
       col_id_t colIdSchema = pColSchema->colId;
-      col_id_t colIdNeed = *(col_id_t*)taosArrayGet(pHandle->pColIdList, colNeed);
+      col_id_t colIdNeed = *(col_id_t*)taosArrayGet(pReader->pColIdList, colNeed);
       if (colIdSchema < colIdNeed) {
         colMeta++;
       } else if (colIdSchema > colIdNeed) {
@@ -216,7 +275,7 @@ int32_t tqRetrieveDataBlock(SSDataBlock* pBlock, SStreamReader* pHandle) {
     }
   }
 
-  if (blockDataEnsureCapacity(pBlock, pHandle->msgIter.numOfRows) < 0) {
+  if (blockDataEnsureCapacity(pBlock, pReader->msgIter.numOfRows) < 0) {
     goto FAIL;
   }
 
@@ -227,13 +286,12 @@ int32_t tqRetrieveDataBlock(SSDataBlock* pBlock, SStreamReader* pHandle) {
   STSRow* row;
   int32_t curRow = 0;
 
-  tInitSubmitBlkIter(&pHandle->msgIter, pHandle->pBlock, &pHandle->blkIter);
+  tInitSubmitBlkIter(&pReader->msgIter, pReader->pBlock, &pReader->blkIter);
 
-  pBlock->info.groupId = 0;
-  pBlock->info.uid = pHandle->msgIter.uid;
-  pBlock->info.rows = pHandle->msgIter.numOfRows;
+  pBlock->info.uid = pReader->msgIter.uid;
+  pBlock->info.rows = pReader->msgIter.numOfRows;
 
-  while ((row = tGetSubmitBlkNext(&pHandle->blkIter)) != NULL) {
+  while ((row = tGetSubmitBlkNext(&pReader->blkIter)) != NULL) {
     tdSTSRowIterReset(&iter, row);
     // get all wanted col of that block
     for (int32_t i = 0; i < colActual; i++) {
@@ -255,9 +313,9 @@ FAIL:
   return -1;
 }
 
-void tqReadHandleSetColIdList(SStreamReader* pReadHandle, SArray* pColIdList) { pReadHandle->pColIdList = pColIdList; }
+void tqReaderSetColIdList(STqReader* pReadHandle, SArray* pColIdList) { pReadHandle->pColIdList = pColIdList; }
 
-int tqReadHandleSetTbUidList(SStreamReader* pHandle, const SArray* tbUidList) {
+int tqReaderSetTbUidList(STqReader* pHandle, const SArray* tbUidList) {
   if (pHandle->tbIdHash) {
     taosHashClear(pHandle->tbIdHash);
   }
@@ -276,7 +334,7 @@ int tqReadHandleSetTbUidList(SStreamReader* pHandle, const SArray* tbUidList) {
   return 0;
 }
 
-int tqReadHandleAddTbUidList(SStreamReader* pHandle, const SArray* tbUidList) {
+int tqReaderAddTbUidList(STqReader* pHandle, const SArray* tbUidList) {
   if (pHandle->tbIdHash == NULL) {
     pHandle->tbIdHash = taosHashInit(64, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BIGINT), true, HASH_NO_LOCK);
     if (pHandle->tbIdHash == NULL) {
@@ -293,7 +351,7 @@ int tqReadHandleAddTbUidList(SStreamReader* pHandle, const SArray* tbUidList) {
   return 0;
 }
 
-int tqReadHandleRemoveTbUidList(SStreamReader* pHandle, const SArray* tbUidList) {
+int tqReaderRemoveTbUidList(STqReader* pHandle, const SArray* tbUidList) {
   ASSERT(pHandle->tbIdHash != NULL);
 
   for (int32_t i = 0; i < taosArrayGetSize(tbUidList); i++) {
diff --git a/source/dnode/vnode/src/tsdb/tsdbCache.c b/source/dnode/vnode/src/tsdb/tsdbCache.c
index dc6fc36035..2086d94099 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCache.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCache.c
@@ -309,9 +309,11 @@ static int32_t getTableDelIdx(SDelFReader *pDelFReader, tb_uid_t suid, tb_uid_t
   if (code) goto _err;
 
   // code = tMapDataSearch(&delIdxMap, &idx, tGetDelIdx, tCmprDelIdx, pDelIdx);
-  pDelIdx = taosArraySearch(pDelIdxArray, &idx, tCmprDelIdx, TD_EQ);
+  SDelIdx *pIdx = taosArraySearch(pDelIdxArray, &idx, tCmprDelIdx, TD_EQ);
   if (code) goto _err;
 
+  *pDelIdx = *pIdx;
+
   if (pDelIdxArray) {
     taosArrayDestroy(pDelIdxArray);
   }
diff --git a/source/dnode/vnode/src/tsdb/tsdbCommit.c b/source/dnode/vnode/src/tsdb/tsdbCommit.c
index 6489a1b955..8a189d98b3 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCommit.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCommit.c
@@ -168,8 +168,6 @@ static int32_t tsdbCommitTableDel(SCommitter *pCommitter, STbData *pTbData, SDel
   tb_uid_t  suid;
   tb_uid_t  uid;
 
-  taosArrayClear(pCommitter->aDelData);
-
   if (pTbData) {
     suid = pTbData->suid;
     uid = pTbData->uid;
@@ -185,6 +183,8 @@ static int32_t tsdbCommitTableDel(SCommitter *pCommitter, STbData *pTbData, SDel
 
     code = tsdbReadDelData(pCommitter->pDelFReader, pDelIdx, pCommitter->aDelData, NULL);
     if (code) goto _err;
+  } else {
+    taosArrayClear(pCommitter->aDelData);
   }
 
   if (pTbData == NULL && pDelIdx == NULL) goto _exit;
@@ -205,7 +205,7 @@ static int32_t tsdbCommitTableDel(SCommitter *pCommitter, STbData *pTbData, SDel
   if (code) goto _err;
 
   // put delIdx
-  if (taosArrayPush(pCommitter->aDelIdx, &delIdx) == NULL) {
+  if (taosArrayPush(pCommitter->aDelIdxN, &delIdx) == NULL) {
     code = TSDB_CODE_OUT_OF_MEMORY;
     goto _err;
   }
@@ -602,7 +602,7 @@ static int32_t tsdbGetOvlpNRow(STbDataIter *pIter, SBlock *pBlock) {
 
   iter.pRow = NULL;
   while (true) {
-    pRow = tsdbTbDataIterGet(pIter);
+    pRow = tsdbTbDataIterGet(&iter);
 
     if (pRow == NULL) break;
     key = TSDBROW_KEY(pRow);
@@ -610,7 +610,7 @@ static int32_t tsdbGetOvlpNRow(STbDataIter *pIter, SBlock *pBlock) {
     c = tBlockCmprFn(&(SBlock){.maxKey = key, .minKey = key}, pBlock);
     if (c == 0) {
       nRow++;
-      tsdbTbDataIterNext(pIter);
+      tsdbTbDataIterNext(&iter);
     } else if (c > 0) {
       break;
     } else {
@@ -635,7 +635,7 @@ static int32_t tsdbMergeAsSubBlock(SCommitter *pCommitter, STbDataIter *pIter, S
   code = tsdbCommitterUpdateRowSchema(pCommitter, pBlockIdx->suid, pBlockIdx->uid, TSDBROW_SVERSION(pRow));
   if (code) goto _err;
   while (true) {
-    if (pRow) break;
+    if (pRow == NULL) break;
     code = tBlockDataAppendRow(pBlockData, pRow, pCommitter->skmRow.pTSchema);
     if (code) goto _err;
 
diff --git a/source/dnode/vnode/src/tsdb/tsdbFS.c b/source/dnode/vnode/src/tsdb/tsdbFS.c
index d498fa71ab..4a33dab08c 100644
--- a/source/dnode/vnode/src/tsdb/tsdbFS.c
+++ b/source/dnode/vnode/src/tsdb/tsdbFS.c
@@ -520,7 +520,7 @@ static int32_t tsdbScanAndTryFixFS(STsdbFS *pFS, int8_t deepScan) {
   return code;
 
 _err:
-  tsdbError("vgId:%d tsdb can and try fix fs failed since %s", TD_VID(pTsdb->pVnode), tstrerror(code));
+  tsdbError("vgId:%d tsdb scan and try fix fs failed since %s", TD_VID(pTsdb->pVnode), tstrerror(code));
   return code;
 }
 
diff --git a/source/dnode/vnode/src/tsdb/tsdbMemTable.c b/source/dnode/vnode/src/tsdb/tsdbMemTable.c
index a50125cc4b..9381f673d8 100644
--- a/source/dnode/vnode/src/tsdb/tsdbMemTable.c
+++ b/source/dnode/vnode/src/tsdb/tsdbMemTable.c
@@ -105,7 +105,7 @@ int32_t tsdbInsertTableData(STsdb *pTsdb, int64_t version, SSubmitMsgIter *pMsgI
 
   // check if table exists (todo: refact)
   SMetaReader mr = {0};
-  SMetaEntry  me = {0};
+  // SMetaEntry  me = {0};
   metaReaderInit(&mr, pTsdb->pVnode->pMeta, 0);
   if (metaGetTableEntryByUid(&mr, pMsgIter->uid) < 0) {
     metaReaderClear(&mr);
@@ -117,6 +117,8 @@ int32_t tsdbInsertTableData(STsdb *pTsdb, int64_t version, SSubmitMsgIter *pMsgI
   if (mr.me.type == TSDB_NORMAL_TABLE) {
     sverNew = mr.me.ntbEntry.schemaRow.version;
   } else {
+    tDecoderClear(&mr.coder);
+
     metaGetTableEntryByUid(&mr, mr.me.ctbEntry.suid);
     sverNew = mr.me.stbEntry.schemaRow.version;
   }
diff --git a/source/dnode/vnode/src/tsdb/tsdbRead.c b/source/dnode/vnode/src/tsdb/tsdbRead.c
index e53a1b43af..8e5b135858 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRead.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRead.c
@@ -1940,6 +1940,7 @@ static int32_t doMergeThreeLevelRows(STsdbReader* pReader, STableBlockScanInfo*
   }
 
   ASSERT(0);
+  return -1;
 }
 
 static bool isValidFileBlockRow(SBlockData* pBlockData, SFileBlockDumpInfo* pDumpInfo,
diff --git a/source/dnode/vnode/src/tsdb/tsdbReaderWriter.c b/source/dnode/vnode/src/tsdb/tsdbReaderWriter.c
index c22d1a4064..98decfe002 100644
--- a/source/dnode/vnode/src/tsdb/tsdbReaderWriter.c
+++ b/source/dnode/vnode/src/tsdb/tsdbReaderWriter.c
@@ -49,7 +49,7 @@ int32_t tsdbDelFWriterOpen(SDelFWriter **ppWriter, SDelFile *pFile, STsdb *pTsdb
   }
 
   pDelFWriter->fDel.size = TSDB_FHDR_SIZE;
-  pDelFWriter->fDel.size = 0;
+  pDelFWriter->fDel.offset = 0;
 
   *ppWriter = pDelFWriter;
   return code;
@@ -969,6 +969,8 @@ int32_t tsdbReadColData(SDataFReader *pReader, SBlockIdx *pBlockIdx, SBlock *pBl
     SBlockData *pBlockData1 = &(SBlockData){0};
     SBlockData *pBlockData2 = &(SBlockData){0};
 
+    tBlockDataInit(pBlockData1);
+    tBlockDataInit(pBlockData2);
     for (int32_t iSubBlock = 1; iSubBlock < pBlock->nSubBlock; iSubBlock++) {
       code = tsdbReadSubColData(pReader, pBlockIdx, pBlock, iSubBlock, aColId, nCol, pBlockData1, ppBuf1, ppBuf2);
       if (code) goto _err;
@@ -1106,6 +1108,8 @@ int32_t tsdbReadBlockData(SDataFReader *pReader, SBlockIdx *pBlockIdx, SBlock *p
     SBlockData *pBlockData1 = &(SBlockData){0};
     SBlockData *pBlockData2 = &(SBlockData){0};
 
+    tBlockDataInit(pBlockData1);
+    tBlockDataInit(pBlockData2);
     for (iSubBlock = 1; iSubBlock < pBlock->nSubBlock; iSubBlock++) {
       code = tsdbReadSubBlockData(pReader, pBlockIdx, pBlock, iSubBlock, pBlockData1, ppBuf1, ppBuf2);
       if (code) {
diff --git a/source/dnode/vnode/src/tsdb/tsdbUtil.c b/source/dnode/vnode/src/tsdb/tsdbUtil.c
index f906ef1b54..24b7c08476 100644
--- a/source/dnode/vnode/src/tsdb/tsdbUtil.c
+++ b/source/dnode/vnode/src/tsdb/tsdbUtil.c
@@ -821,16 +821,20 @@ int32_t tColDataCopy(SColData *pColDataSrc, SColData *pColDataDest) {
   int32_t code = 0;
   int32_t size;
 
+  ASSERT(pColDataSrc->nVal > 0);
+
   pColDataDest->cid = pColDataSrc->cid;
   pColDataDest->type = pColDataSrc->type;
   pColDataDest->smaOn = pColDataSrc->smaOn;
   pColDataDest->nVal = pColDataSrc->nVal;
   pColDataDest->flag = pColDataSrc->flag;
 
-  size = BIT2_SIZE(pColDataSrc->nVal);
-  code = tRealloc(&pColDataDest->pBitMap, size);
-  if (code) goto _exit;
-  memcpy(pColDataDest->pBitMap, pColDataSrc->pBitMap, size);
+  if (pColDataSrc->flag != HAS_NONE && pColDataSrc->flag != HAS_NULL && pColDataSrc->flag != HAS_VALUE) {
+    size = BIT2_SIZE(pColDataSrc->nVal);
+    code = tRealloc(&pColDataDest->pBitMap, size);
+    if (code) goto _exit;
+    memcpy(pColDataDest->pBitMap, pColDataSrc->pBitMap, size);
+  }
 
   if (IS_VAR_DATA_TYPE(pColDataDest->type)) {
     size = sizeof(int32_t) * pColDataSrc->nVal;
diff --git a/source/libs/executor/inc/executorimpl.h b/source/libs/executor/inc/executorimpl.h
index 8994c9d192..3488069925 100644
--- a/source/libs/executor/inc/executorimpl.h
+++ b/source/libs/executor/inc/executorimpl.h
@@ -348,7 +348,7 @@ typedef struct SessionWindowSupporter {
   uint8_t parentType;
 } SessionWindowSupporter;
 
-typedef struct SStreamBlockScanInfo {
+typedef struct SStreamScanInfo {
   uint64_t        tableUid;         // queried super table uid
   SExprInfo*      pPseudoExpr;
   int32_t         numOfPseudoExpr;
@@ -365,7 +365,7 @@ typedef struct SStreamBlockScanInfo {
   int32_t         blockType;        // current block type
   int32_t         validBlockIndex;  // Is current data has returned?
   uint64_t        numOfExec;        // execution times
-  void*           streamBlockReader;// stream block reader handle
+  STqReader*           tqReader;
 
   int32_t         tsArrayIndex;
   SArray*         tsArray;
@@ -374,7 +374,7 @@ typedef struct SStreamBlockScanInfo {
 
   EStreamScanMode scanMode;
   SOperatorInfo* pStreamScanOp;
-  SOperatorInfo* pSnapshotReadOp;
+  SOperatorInfo* pTableScanOp;
   SArray*        childIds;
   SessionWindowSupporter sessionSup;
   bool            assignBlockUid; // assign block uid to groupId, temporarily used for generating rollup SMA.
@@ -383,7 +383,12 @@ typedef struct SStreamBlockScanInfo {
   SSDataBlock*    pPullDataRes;             // pull data SSDataBlock
   SSDataBlock*    pDeleteDataRes;             // delete data SSDataBlock
   int32_t         deleteDataIndex;
-} SStreamBlockScanInfo;
+
+  // status for tmq
+  //SSchemaWrapper schema;
+  STqOffset offset;
+
+} SStreamScanInfo;
 
 typedef struct SSysTableScanInfo {
   SRetrieveMetaTableRsp* pRsp;
@@ -518,6 +523,7 @@ typedef struct SIndefOperatorInfo {
   SAggSupporter      aggSup;
   SArray*            pPseudoColInfo;
   SExprSupp          scalarSup;
+  SNode*             pCondition;
 } SIndefOperatorInfo;
 
 typedef struct SFillOperatorInfo {
@@ -528,6 +534,7 @@ typedef struct SFillOperatorInfo {
   SSDataBlock*      existNewGroupBlock;
   bool              multigroupResult;
   STimeWindow       win;
+  SNode*            pCondition;
 } SFillOperatorInfo;
 
 typedef struct SGroupbyOperatorInfo {
diff --git a/source/libs/executor/src/executor.c b/source/libs/executor/src/executor.c
index be50a1d3bd..a83565cbe0 100644
--- a/source/libs/executor/src/executor.c
+++ b/source/libs/executor/src/executor.c
@@ -37,7 +37,7 @@ static int32_t doSetStreamBlock(SOperatorInfo* pOperator, void* input, size_t nu
   } else {
     pOperator->status = OP_NOT_OPENED;
 
-    SStreamBlockScanInfo* pInfo = pOperator->info;
+    SStreamScanInfo* pInfo = pOperator->info;
     pInfo->assignBlockUid = assignUid;
 
     // TODO: if a block was set but not consumed,
@@ -45,7 +45,7 @@ static int32_t doSetStreamBlock(SOperatorInfo* pOperator, void* input, size_t nu
     pInfo->blockType = type;
 
     if (type == STREAM_INPUT__DATA_SUBMIT) {
-      if (tqReadHandleSetMsg(pInfo->streamBlockReader, input, 0) < 0) {
+      if (tqReaderSetDataMsg(pInfo->tqReader, input, 0) < 0) {
         qError("submit msg messed up when initing stream block, %s" PRIx64, id);
         return TSDB_CODE_QRY_APP_ERROR;
       }
@@ -105,7 +105,7 @@ int32_t qSetMultiStreamInput(qTaskInfo_t tinfo, const void* pBlocks, size_t numO
   return code;
 }
 
-qTaskInfo_t qCreateStreamExecTaskInfo(void* msg, void* streamReadHandle) {
+qTaskInfo_t qCreateStreamExecTaskInfo(void* msg, SReadHandle* readers) {
   if (msg == NULL) {
     return NULL;
   }
@@ -120,7 +120,7 @@ qTaskInfo_t qCreateStreamExecTaskInfo(void* msg, void* streamReadHandle) {
   }
 
   qTaskInfo_t pTaskInfo = NULL;
-  code = qCreateExecTask(streamReadHandle, 0, 0, plan, &pTaskInfo, NULL, NULL, OPTR_EXEC_MODEL_STREAM);
+  code = qCreateExecTask(readers, 0, 0, plan, &pTaskInfo, NULL, NULL, OPTR_EXEC_MODEL_STREAM);
   if (code != TSDB_CODE_SUCCESS) {
     // TODO: destroy SSubplan & pTaskInfo
     terrno = code;
@@ -130,7 +130,7 @@ qTaskInfo_t qCreateStreamExecTaskInfo(void* msg, void* streamReadHandle) {
   return pTaskInfo;
 }
 
-static SArray* filterQualifiedChildTables(const SStreamBlockScanInfo* pScanInfo, const SArray* tableIdList) {
+static SArray* filterQualifiedChildTables(const SStreamScanInfo* pScanInfo, const SArray* tableIdList) {
   SArray* qa = taosArrayInit(4, sizeof(tb_uid_t));
 
   // let's discard the tables those are not created according to the queried super table.
@@ -168,17 +168,17 @@ int32_t qUpdateQualifiedTableId(qTaskInfo_t tinfo, const SArray* tableIdList, bo
     pInfo = pInfo->pDownstream[0];
   }
 
-  int32_t               code = 0;
-  SStreamBlockScanInfo* pScanInfo = pInfo->info;
+  int32_t          code = 0;
+  SStreamScanInfo* pScanInfo = pInfo->info;
   if (isAdd) {  // add new table id
     SArray* qa = filterQualifiedChildTables(pScanInfo, tableIdList);
 
     qDebug(" %d qualified child tables added into stream scanner", (int32_t)taosArrayGetSize(qa));
-    code = tqReadHandleAddTbUidList(pScanInfo->streamBlockReader, qa);
+    code = tqReaderAddTbUidList(pScanInfo->tqReader, qa);
     taosArrayDestroy(qa);
   } else {  // remove the table id in current list
     qDebug(" %d remove child tables from the stream scanner", (int32_t)taosArrayGetSize(tableIdList));
-    code = tqReadHandleRemoveTbUidList(pScanInfo->streamBlockReader, tableIdList);
+    code = tqReaderRemoveTbUidList(pScanInfo->tqReader, tableIdList);
   }
 
   return code;
diff --git a/source/libs/executor/src/executorMain.c b/source/libs/executor/src/executorMain.c
index 7f84b4c174..d5e546f466 100644
--- a/source/libs/executor/src/executorMain.c
+++ b/source/libs/executor/src/executorMain.c
@@ -236,6 +236,37 @@ int32_t qDeserializeTaskStatus(qTaskInfo_t tinfo, const char* pInput, int32_t le
   return decodeOperator(pTaskInfo->pRoot, pInput, len);
 }
 
+int32_t qExtractStreamScanner(qTaskInfo_t tinfo, void** scanner) {
+  SExecTaskInfo* pTaskInfo = (SExecTaskInfo*)tinfo;
+  SOperatorInfo* pOperator = pTaskInfo->pRoot;
+
+  while (1) {
+    uint8_t type = pOperator->operatorType;
+    if (type == QUERY_NODE_PHYSICAL_PLAN_STREAM_SCAN) {
+      *scanner = pOperator->info;
+      return 0;
+    } else {
+      ASSERT(pOperator->numOfDownstream == 1);
+      pOperator = pOperator->pDownstream[0];
+    }
+  }
+}
+
+void* qExtractReaderFromStreamScanner(void* scanner) {
+  SStreamScanInfo* pInfo = scanner;
+  return (void*)pInfo->tqReader;
+}
+
+const SSchemaWrapper* qExtractSchemaFromStreamScanner(void* scanner) {
+  SStreamScanInfo* pInfo = scanner;
+  return pInfo->tqReader->pSchemaWrapper;
+}
+
+const STqOffset* qExtractStatusFromStreamScanner(void* scanner) {
+  SStreamScanInfo* pInfo = scanner;
+  return &pInfo->offset;
+}
+
 int32_t qStreamPrepareScan(qTaskInfo_t tinfo, uint64_t uid, int64_t ts) {
   SExecTaskInfo* pTaskInfo = (SExecTaskInfo*)tinfo;
 
diff --git a/source/libs/executor/src/executorimpl.c b/source/libs/executor/src/executorimpl.c
index 3bf6c9fa0a..ab08cfd2b3 100644
--- a/source/libs/executor/src/executorimpl.c
+++ b/source/libs/executor/src/executorimpl.c
@@ -2844,17 +2844,17 @@ int32_t getTableScanInfo(SOperatorInfo* pOperator, int32_t* order, int32_t* scan
 }
 
 int32_t doPrepareScan(SOperatorInfo* pOperator, uint64_t uid, int64_t ts) {
-  int32_t type = pOperator->operatorType;
+  uint8_t type = pOperator->operatorType;
 
   pOperator->status = OP_OPENED;
 
   if (type == QUERY_NODE_PHYSICAL_PLAN_STREAM_SCAN) {
-    SStreamBlockScanInfo* pScanInfo = pOperator->info;
+    SStreamScanInfo* pScanInfo = pOperator->info;
     pScanInfo->blockType = STREAM_INPUT__DATA_SCAN;
 
-    pScanInfo->pSnapshotReadOp->status = OP_OPENED;
+    pScanInfo->pTableScanOp->status = OP_OPENED;
 
-    STableScanInfo* pInfo = pScanInfo->pSnapshotReadOp->info;
+    STableScanInfo* pInfo = pScanInfo->pTableScanOp->info;
     ASSERT(pInfo->scanMode == TABLE_SCAN__TABLE_ORDER);
 
     if (uid == 0) {
@@ -2914,8 +2914,8 @@ int32_t doPrepareScan(SOperatorInfo* pOperator, uint64_t uid, int64_t ts) {
 int32_t doGetScanStatus(SOperatorInfo* pOperator, uint64_t* uid, int64_t* ts) {
   int32_t type = pOperator->operatorType;
   if (type == QUERY_NODE_PHYSICAL_PLAN_STREAM_SCAN) {
-    SStreamBlockScanInfo* pScanInfo = pOperator->info;
-    STableScanInfo*       pSnapShotScanInfo = pScanInfo->pSnapshotReadOp->info;
+    SStreamScanInfo* pScanInfo = pOperator->info;
+    STableScanInfo*  pSnapShotScanInfo = pScanInfo->pTableScanOp->info;
     *uid = pSnapShotScanInfo->lastStatus.uid;
     *ts = pSnapShotScanInfo->lastStatus.ts;
   } else {
@@ -3364,7 +3364,7 @@ static void doHandleRemainBlockFromNewGroup(SFillOperatorInfo* pInfo, SResultInf
   }
 }
 
-static SSDataBlock* doFill(SOperatorInfo* pOperator) {
+static SSDataBlock* doFillImpl(SOperatorInfo* pOperator) {
   SFillOperatorInfo* pInfo = pOperator->info;
   SExecTaskInfo*     pTaskInfo = pOperator->pTaskInfo;
 
@@ -3372,9 +3372,6 @@ static SSDataBlock* doFill(SOperatorInfo* pOperator) {
   SSDataBlock* pResBlock = pInfo->pRes;
 
   blockDataCleanup(pResBlock);
-  if (pOperator->status == OP_EXEC_DONE) {
-    return NULL;
-  }
 
   // todo handle different group data interpolation
   bool  n = false;
@@ -3440,6 +3437,39 @@ static SSDataBlock* doFill(SOperatorInfo* pOperator) {
   }
 }
 
+static SSDataBlock* doFill(SOperatorInfo* pOperator) {
+  SFillOperatorInfo* pInfo = pOperator->info;
+  SExecTaskInfo*     pTaskInfo = pOperator->pTaskInfo;
+
+  if (pOperator->status == OP_EXEC_DONE) {
+    return NULL;
+  }
+
+  SSDataBlock* fillResult = NULL;
+  while (true) {
+    fillResult = doFillImpl(pOperator);
+    if (fillResult != NULL) {
+      doFilter(pInfo->pCondition, fillResult);
+    }
+
+    if (fillResult == NULL) {
+      doSetOperatorCompleted(pOperator);
+      break;
+    }
+
+    if (fillResult->info.rows > 0) {
+      break;
+    }
+  }
+
+  if (fillResult != NULL) {
+    size_t rows = fillResult->info.rows;
+    pOperator->resultInfo.totalRows += rows;
+  }
+
+  return fillResult;
+}
+
 static void destroyExprInfo(SExprInfo* pExpr, int32_t numOfExprs) {
   for (int32_t i = 0; i < numOfExprs; ++i) {
     SExprInfo* pExprInfo = &pExpr[i];
@@ -3832,6 +3862,8 @@ static SSDataBlock* doApplyIndefinitFunction(SOperatorInfo* pOperator) {
     }
   }
 
+  doFilter(pIndefInfo->pCondition, pInfo->pRes);
+
   size_t rows = pInfo->pRes->info.rows;
   pOperator->resultInfo.totalRows += rows;
 
@@ -3885,6 +3917,7 @@ SOperatorInfo* createIndefinitOutputOperatorInfo(SOperatorInfo* downstream, SPhy
 
   pInfo->binfo.pRes = pResBlock;
   pInfo->pPseudoColInfo = setRowTsColumnOutputInfo(pSup->pCtx, numOfExpr);
+  pInfo->pCondition = pPhyNode->node.pConditions;
 
   pOperator->name = "IndefinitOperator";
   pOperator->operatorType = QUERY_NODE_PHYSICAL_PLAN_PROJECT;
@@ -3958,6 +3991,7 @@ SOperatorInfo* createFillOperatorInfo(SOperatorInfo* downstream, SFillPhysiNode*
 
   pInfo->pRes = pResBlock;
   pInfo->multigroupResult = multigroupResult;
+  pInfo->pCondition = pPhyFillNode->node.pConditions;
   pOperator->name = "FillOperator";
   pOperator->blocking = false;
   pOperator->status = OP_NOT_OPENED;
@@ -4312,11 +4346,11 @@ SOperatorInfo* createOperatorTree(SPhysiNode* pPhyNode, SExecTaskInfo* pTaskInfo
     } else if (QUERY_NODE_PHYSICAL_PLAN_LAST_ROW_SCAN == type) {
       SLastRowScanPhysiNode* pScanNode = (SLastRowScanPhysiNode*)pPhyNode;
 
-//      int32_t code = createScanTableListInfo(pTableScanNode, pHandle, pTableListInfo, queryId, taskId);
-//      if (code) {
-//        pTaskInfo->code = code;
-//        return NULL;
-//      }
+      //      int32_t code = createScanTableListInfo(pTableScanNode, pHandle, pTableListInfo, queryId, taskId);
+      //      if (code) {
+      //        pTaskInfo->code = code;
+      //        return NULL;
+      //      }
 
       int32_t code = extractTableSchemaVersion(pHandle, pScanNode->uid, pTaskInfo);
       if (code != TSDB_CODE_SUCCESS) {
@@ -4373,8 +4407,8 @@ SOperatorInfo* createOperatorTree(SPhysiNode* pPhyNode, SExecTaskInfo* pTaskInfo
       pOptr = createGroupOperatorInfo(ops[0], pExprInfo, num, pResBlock, pColList, pAggNode->node.pConditions,
                                       pScalarExprInfo, numOfScalarExpr, pTaskInfo);
     } else {
-      pOptr =
-          createAggregateOperatorInfo(ops[0], pExprInfo, num, pResBlock, pAggNode->node.pConditions, pScalarExprInfo, numOfScalarExpr, pTaskInfo);
+      pOptr = createAggregateOperatorInfo(ops[0], pExprInfo, num, pResBlock, pAggNode->node.pConditions,
+                                          pScalarExprInfo, numOfScalarExpr, pTaskInfo);
     }
   } else if (QUERY_NODE_PHYSICAL_PLAN_HASH_INTERVAL == type || QUERY_NODE_PHYSICAL_PLAN_STREAM_INTERVAL == type) {
     SIntervalPhysiNode* pIntervalPhyNode = (SIntervalPhysiNode*)pPhyNode;
@@ -4541,7 +4575,8 @@ SArray* extractColumnInfo(SNodeList* pNodeList) {
   return pList;
 }
 
-STsdbReader* doCreateDataReader(STableScanPhysiNode* pTableScanNode, SReadHandle* pHandle, STableListInfo* pTableListInfo, const char* idstr) {
+STsdbReader* doCreateDataReader(STableScanPhysiNode* pTableScanNode, SReadHandle* pHandle,
+                                STableListInfo* pTableListInfo, const char* idstr) {
   int32_t code = getTableList(pHandle->meta, pHandle->vnode, &pTableScanNode->scan, pTableListInfo);
   if (code != TSDB_CODE_SUCCESS) {
     goto _error;
@@ -4587,9 +4622,9 @@ static int32_t extractTbscanInStreamOpTree(SOperatorInfo* pOperator, STableScanI
     }
     return extractTbscanInStreamOpTree(pOperator->pDownstream[0], ppInfo);
   } else {
-    SStreamBlockScanInfo* pInfo = pOperator->info;
-    ASSERT(pInfo->pSnapshotReadOp->operatorType == QUERY_NODE_PHYSICAL_PLAN_TABLE_SCAN);
-    *ppInfo = pInfo->pSnapshotReadOp->info;
+    SStreamScanInfo* pInfo = pOperator->info;
+    ASSERT(pInfo->pTableScanOp->operatorType == QUERY_NODE_PHYSICAL_PLAN_TABLE_SCAN);
+    *ppInfo = pInfo->pTableScanOp->info;
     return 0;
   }
 }
@@ -4785,7 +4820,6 @@ int32_t createExecTaskInfoImpl(SSubplan* pPlan, SExecTaskInfo** pTaskInfo, SRead
   (*pTaskInfo)->pRoot = createOperatorTree(pPlan->pNode, *pTaskInfo, pHandle, queryId, taskId,
                                            &(*pTaskInfo)->tableqinfoList, pPlan->user);
 
-
   if (NULL == (*pTaskInfo)->pRoot) {
     code = (*pTaskInfo)->code;
     goto _complete;
diff --git a/source/libs/executor/src/scanoperator.c b/source/libs/executor/src/scanoperator.c
index f5a4358abb..68cda52b10 100644
--- a/source/libs/executor/src/scanoperator.c
+++ b/source/libs/executor/src/scanoperator.c
@@ -780,7 +780,7 @@ _error:
   return NULL;
 }
 
-static void doClearBufferedBlocks(SStreamBlockScanInfo* pInfo) {
+static void doClearBufferedBlocks(SStreamScanInfo* pInfo) {
   size_t total = taosArrayGetSize(pInfo->pBlockLists);
 
   pInfo->validBlockIndex = 0;
@@ -791,21 +791,20 @@ static void doClearBufferedBlocks(SStreamBlockScanInfo* pInfo) {
   taosArrayClear(pInfo->pBlockLists);
 }
 
-static bool isSessionWindow(SStreamBlockScanInfo* pInfo) {
+static bool isSessionWindow(SStreamScanInfo* pInfo) {
   return pInfo->sessionSup.parentType == QUERY_NODE_PHYSICAL_PLAN_STREAM_SESSION ||
-      pInfo->sessionSup.parentType == QUERY_NODE_PHYSICAL_PLAN_STREAM_SESSION;
+         pInfo->sessionSup.parentType == QUERY_NODE_PHYSICAL_PLAN_STREAM_SESSION;
 }
 
-static bool isStateWindow(SStreamBlockScanInfo* pInfo) {
+static bool isStateWindow(SStreamScanInfo* pInfo) {
   return pInfo->sessionSup.parentType == QUERY_NODE_PHYSICAL_PLAN_STREAM_STATE;
 }
 
-static bool isIntervalWindow(SStreamBlockScanInfo* pInfo) {
+static bool isIntervalWindow(SStreamScanInfo* pInfo) {
   return pInfo->sessionSup.parentType == QUERY_NODE_PHYSICAL_PLAN_STREAM_INTERVAL ||
-      pInfo->sessionSup.parentType == QUERY_NODE_PHYSICAL_PLAN_STREAM_SEMI_INTERVAL;
+         pInfo->sessionSup.parentType == QUERY_NODE_PHYSICAL_PLAN_STREAM_SEMI_INTERVAL;
 }
 
-
 static uint64_t getGroupId(SOperatorInfo* pOperator, uint64_t uid) {
   uint64_t* groupId = taosHashGet(pOperator->pTaskInfo->tableqinfoList.map, &uid, sizeof(int64_t));
   if (groupId) {
@@ -827,19 +826,17 @@ static uint64_t getGroupId(SOperatorInfo* pOperator, uint64_t uid) {
   */
 }
 
-static void setGroupId(SStreamBlockScanInfo* pInfo, SSDataBlock* pBlock, int32_t groupColIndex, int32_t rowIndex) {
+static void setGroupId(SStreamScanInfo* pInfo, SSDataBlock* pBlock, int32_t groupColIndex, int32_t rowIndex) {
   ASSERT(rowIndex < pBlock->info.rows);
-  switch (pBlock->info.type)
-  {
-  case STREAM_DELETE_DATA:
-  case STREAM_RETRIEVE: {
-    SColumnInfoData* pColInfo = taosArrayGet(pBlock->pDataBlock, groupColIndex);
-    uint64_t* groupCol = (uint64_t*)pColInfo->pData;
-    pInfo->groupId = groupCol[rowIndex];
-  }
-    break;
-  default:
-    break;
+  switch (pBlock->info.type) {
+    case STREAM_DELETE_DATA:
+    case STREAM_RETRIEVE: {
+      SColumnInfoData* pColInfo = taosArrayGet(pBlock->pDataBlock, groupColIndex);
+      uint64_t*        groupCol = (uint64_t*)pColInfo->pData;
+      pInfo->groupId = groupCol[rowIndex];
+    } break;
+    default:
+      break;
   }
 }
 
@@ -854,17 +851,17 @@ void resetTableScanInfo(STableScanInfo* pTableScanInfo, STimeWindow* pWin) {
   pTableScanInfo->currentGroupId = -1;
 }
 
-static bool prepareRangeScan(SStreamBlockScanInfo* pInfo, SSDataBlock* pBlock, int32_t* pRowIndex) {
+static bool prepareRangeScan(SStreamScanInfo* pInfo, SSDataBlock* pBlock, int32_t* pRowIndex) {
   if ((*pRowIndex) == pBlock->info.rows) {
     return false;
   }
 
   ASSERT(taosArrayGetSize(pBlock->pDataBlock) >= 3);
   SColumnInfoData* pStartTsCol = taosArrayGet(pBlock->pDataBlock, START_TS_COLUMN_INDEX);
-  TSKEY* startData = (TSKEY*)pStartTsCol->pData;
+  TSKEY*           startData = (TSKEY*)pStartTsCol->pData;
   SColumnInfoData* pEndTsCol = taosArrayGet(pBlock->pDataBlock, END_TS_COLUMN_INDEX);
-  TSKEY* endData = (TSKEY*)pEndTsCol->pData;
-  STimeWindow win = {.skey = startData[*pRowIndex], .ekey = endData[*pRowIndex]};
+  TSKEY*           endData = (TSKEY*)pEndTsCol->pData;
+  STimeWindow      win = {.skey = startData[*pRowIndex], .ekey = endData[*pRowIndex]};
   setGroupId(pInfo, pBlock, GROUPID_COLUMN_INDEX, *pRowIndex);
   (*pRowIndex)++;
 
@@ -877,16 +874,16 @@ static bool prepareRangeScan(SStreamBlockScanInfo* pInfo, SSDataBlock* pBlock, i
       win.skey = TMIN(win.skey, startData[*pRowIndex]);
       continue;
     }
-    ASSERT( (win.skey > startData[*pRowIndex] && win.ekey < endData[*pRowIndex]) ||
-            ( isInTimeWindow(&win, startData[*pRowIndex], 0) || isInTimeWindow(&win, endData[*pRowIndex], 0) ) );
+    ASSERT((win.skey > startData[*pRowIndex] && win.ekey < endData[*pRowIndex]) ||
+           (isInTimeWindow(&win, startData[*pRowIndex], 0) || isInTimeWindow(&win, endData[*pRowIndex], 0)));
     break;
   }
 
-  resetTableScanInfo(pInfo->pSnapshotReadOp->info, &win);
+  resetTableScanInfo(pInfo->pTableScanOp->info, &win);
   return true;
 }
 
-static bool prepareDataScan(SStreamBlockScanInfo* pInfo, SSDataBlock* pSDB, int32_t tsColIndex, int32_t* pRowIndex) {
+static bool prepareDataScan(SStreamScanInfo* pInfo, SSDataBlock* pSDB, int32_t tsColIndex, int32_t* pRowIndex) {
   STimeWindow win = {
       .skey = INT64_MIN,
       .ekey = INT64_MAX,
@@ -907,11 +904,10 @@ static bool prepareDataScan(SStreamBlockScanInfo* pInfo, SSDataBlock* pSDB, int3
       setGroupId(pInfo, pSDB, GROUPID_COLUMN_INDEX, *pRowIndex);
       (*pRowIndex) += updateSessionWindowInfo(pCurWin, tsCols, NULL, pSDB->info.rows, *pRowIndex, gap, NULL);
     } else {
-      win =
-          getActiveTimeWindow(NULL, &dumyInfo, tsCols[*pRowIndex], &pInfo->interval, pInfo->interval.precision, NULL);
+      win = getActiveTimeWindow(NULL, &dumyInfo, tsCols[*pRowIndex], &pInfo->interval, pInfo->interval.precision, NULL);
       setGroupId(pInfo, pSDB, GROUPID_COLUMN_INDEX, *pRowIndex);
-      (*pRowIndex) += getNumOfRowsInTimeWindow(&pSDB->info, tsCols, *pRowIndex, win.ekey, binarySearchForKey, NULL,
-                                               TSDB_ORDER_ASC);
+      (*pRowIndex) +=
+          getNumOfRowsInTimeWindow(&pSDB->info, tsCols, *pRowIndex, win.ekey, binarySearchForKey, NULL, TSDB_ORDER_ASC);
     }
     needRead = true;
   } else if (isStateWindow(pInfo)) {
@@ -929,7 +925,7 @@ static bool prepareDataScan(SStreamBlockScanInfo* pInfo, SSDataBlock* pSDB, int3
   if (!needRead) {
     return false;
   }
-  resetTableScanInfo(pInfo->pSnapshotReadOp->info, &win);
+  resetTableScanInfo(pInfo->pTableScanOp->info, &win);
   return true;
 }
 
@@ -946,13 +942,13 @@ static void copyOneRow(SSDataBlock* dest, SSDataBlock* source, int32_t sourceRow
   dest->info.rows++;
 }
 
-static SSDataBlock* doRangeScan(SStreamBlockScanInfo* pInfo, SSDataBlock* pSDB, int32_t tsColIndex, int32_t* pRowIndex) {
+static SSDataBlock* doRangeScan(SStreamScanInfo* pInfo, SSDataBlock* pSDB, int32_t tsColIndex, int32_t* pRowIndex) {
   while (1) {
     SSDataBlock* pResult = NULL;
-    pResult = doTableScan(pInfo->pSnapshotReadOp);
+    pResult = doTableScan(pInfo->pTableScanOp);
     if (!pResult && prepareRangeScan(pInfo, pSDB, pRowIndex)) {
       // scan next window data
-      pResult = doTableScan(pInfo->pSnapshotReadOp);
+      pResult = doTableScan(pInfo->pTableScanOp);
     }
     if (!pResult) {
       blockDataCleanup(pSDB);
@@ -966,14 +962,14 @@ static SSDataBlock* doRangeScan(SStreamBlockScanInfo* pInfo, SSDataBlock* pSDB,
   }
 }
 
-static SSDataBlock* doDataScan(SStreamBlockScanInfo* pInfo, SSDataBlock* pSDB, int32_t tsColIndex, int32_t* pRowIndex) {
+static SSDataBlock* doDataScan(SStreamScanInfo* pInfo, SSDataBlock* pSDB, int32_t tsColIndex, int32_t* pRowIndex) {
   while (1) {
     SSDataBlock* pResult = NULL;
-    pResult = doTableScan(pInfo->pSnapshotReadOp);
+    pResult = doTableScan(pInfo->pTableScanOp);
     if (pResult == NULL) {
       if (prepareDataScan(pInfo, pSDB, tsColIndex, pRowIndex)) {
         // scan next window data
-        pResult = doTableScan(pInfo->pSnapshotReadOp);
+        pResult = doTableScan(pInfo->pTableScanOp);
       }
     }
     if (!pResult) {
@@ -997,8 +993,8 @@ static SSDataBlock* doDataScan(SStreamBlockScanInfo* pInfo, SSDataBlock* pSDB, i
     return pResult;
   */
 }
-
-static void generateIntervalTs(SStreamBlockScanInfo* pInfo, SSDataBlock* pDelBlock, SOperatorInfo* pOperator, SSDataBlock* pUpdateRes) {
+static void generateIntervalTs(SStreamScanInfo* pInfo, SSDataBlock* pDelBlock, SOperatorInfo* pOperator,
+                               SSDataBlock* pUpdateRes) {
   if (pDelBlock->info.rows == 0) {
     return;
   }
@@ -1006,18 +1002,20 @@ static void generateIntervalTs(SStreamBlockScanInfo* pInfo, SSDataBlock* pDelBlo
   blockDataEnsureCapacity(pUpdateRes, 64);
   ASSERT(taosArrayGetSize(pDelBlock->pDataBlock) >= 3);
   SColumnInfoData* pStartTsCol = taosArrayGet(pDelBlock->pDataBlock, START_TS_COLUMN_INDEX);
-  TSKEY* startData = (TSKEY*)pStartTsCol->pData;
+  TSKEY*           startData = (TSKEY*)pStartTsCol->pData;
   SColumnInfoData* pEndTsCol = taosArrayGet(pDelBlock->pDataBlock, END_TS_COLUMN_INDEX);
-  TSKEY* endData = (TSKEY*)pEndTsCol->pData;
+  TSKEY*           endData = (TSKEY*)pEndTsCol->pData;
   SColumnInfoData* pGpCol = taosArrayGet(pDelBlock->pDataBlock, UID_COLUMN_INDEX);
-  uint64_t* uidCol = (uint64_t*)pGpCol->pData;
+  uint64_t*        uidCol = (uint64_t*)pGpCol->pData;
 
   SColumnInfoData* pDestTsCol = taosArrayGet(pUpdateRes->pDataBlock, START_TS_COLUMN_INDEX);
   SColumnInfoData* pDestGpCol = taosArrayGet(pUpdateRes->pDataBlock, GROUPID_COLUMN_INDEX);
-  for (int32_t i = pInfo->deleteDataIndex ; i < pDelBlock->info.rows &&
-      i < pDelBlock->info.capacity - (endData[i] - startData[i])/pInfo->interval.interval - 1; i++) {
+  for (int32_t i = pInfo->deleteDataIndex;
+       i < pDelBlock->info.rows &&
+       i < pDelBlock->info.capacity - (endData[i] - startData[i]) / pInfo->interval.interval - 1;
+       i++) {
     uint64_t groupId = getGroupId(pOperator, uidCol[i]);
-    for (TSKEY startTs = startData[i]; startTs <= endData[i]; ) {
+    for (TSKEY startTs = startData[i]; startTs <= endData[i];) {
       colDataAppend(pDestTsCol, pUpdateRes->info.rows, (const char*)&startTs, false);
       colDataAppend(pDestGpCol, pUpdateRes->info.rows, (const char*)&groupId, false);
       pUpdateRes->info.rows++;
@@ -1032,33 +1030,36 @@ static void generateIntervalTs(SStreamBlockScanInfo* pInfo, SSDataBlock* pDelBlo
   }
 }
 
-static void generateScanRange(SStreamBlockScanInfo* pInfo, SSDataBlock* pBlock, SOperatorInfo* pOperator, SSDataBlock* pUpdateRes) {
-   if (pBlock->info.rows == 0) {
+static void generateScanRange(SStreamScanInfo* pInfo, SSDataBlock* pBlock, SOperatorInfo* pOperator,
+                              SSDataBlock* pUpdateRes) {
+  if (pBlock->info.rows == 0) {
     return;
   }
   blockDataCleanup(pUpdateRes);
   blockDataEnsureCapacity(pUpdateRes, pBlock->info.rows);
   ASSERT(taosArrayGetSize(pBlock->pDataBlock) >= 3);
   SColumnInfoData* pStartTsCol = taosArrayGet(pBlock->pDataBlock, START_TS_COLUMN_INDEX);
-  TSKEY* startData = (TSKEY*)pStartTsCol->pData;
+  TSKEY*           startData = (TSKEY*)pStartTsCol->pData;
   SColumnInfoData* pEndTsCol = taosArrayGet(pBlock->pDataBlock, END_TS_COLUMN_INDEX);
-  TSKEY* endData = (TSKEY*)pEndTsCol->pData;
+  TSKEY*           endData = (TSKEY*)pEndTsCol->pData;
   SColumnInfoData* pGpCol = taosArrayGet(pBlock->pDataBlock, UID_COLUMN_INDEX);
-  uint64_t* uidCol = (uint64_t*)pGpCol->pData;
+  uint64_t*        uidCol = (uint64_t*)pGpCol->pData;
 
   SColumnInfoData* pDestStartCol = taosArrayGet(pUpdateRes->pDataBlock, START_TS_COLUMN_INDEX);
   SColumnInfoData* pDestEndCol = taosArrayGet(pUpdateRes->pDataBlock, END_TS_COLUMN_INDEX);
   SColumnInfoData* pDestGpCol = taosArrayGet(pUpdateRes->pDataBlock, GROUPID_COLUMN_INDEX);
-  int32_t dummy = 0;
-  for (int32_t i = 0 ; i < pBlock->info.rows; i++) {
+  int32_t          dummy = 0;
+  for (int32_t i = 0; i < pBlock->info.rows; i++) {
     uint64_t groupId = getGroupId(pOperator, uidCol[i]);
-    //gap must be 0.
-    SResultWindowInfo* pStartWin = getCurSessionWindow(pInfo->sessionSup.pStreamAggSup, startData[i], endData[i], groupId, 0, &dummy);
+    // gap must be 0.
+    SResultWindowInfo* pStartWin =
+        getCurSessionWindow(pInfo->sessionSup.pStreamAggSup, startData[i], endData[i], groupId, 0, &dummy);
     if (!pStartWin) {
       // window has been closed.
       continue;
     }
-    SResultWindowInfo* pEndWin = getCurSessionWindow(pInfo->sessionSup.pStreamAggSup, endData[i], endData[i], groupId, 0, &dummy);
+    SResultWindowInfo* pEndWin =
+        getCurSessionWindow(pInfo->sessionSup.pStreamAggSup, endData[i], endData[i], groupId, 0, &dummy);
     ASSERT(pEndWin);
     colDataAppend(pDestStartCol, i, (const char*)&pStartWin->win.skey, false);
     colDataAppend(pDestEndCol, i, (const char*)&pEndWin->win.ekey, false);
@@ -1066,7 +1067,7 @@ static void generateScanRange(SStreamBlockScanInfo* pInfo, SSDataBlock* pBlock,
     pUpdateRes->info.rows++;
   }
 }
-static void setUpdateData(SStreamBlockScanInfo* pInfo, SSDataBlock* pBlock, SSDataBlock* pUpdateBlock) {
+static void setUpdateData(SStreamScanInfo* pInfo, SSDataBlock* pBlock, SSDataBlock* pUpdateBlock) {
   blockDataCleanup(pUpdateBlock);
   int32_t size = taosArrayGetSize(pInfo->tsArray);
   if (pInfo->tsArrayIndex < size) {
@@ -1075,11 +1076,11 @@ static void setUpdateData(SStreamBlockScanInfo* pInfo, SSDataBlock* pBlock, SSDa
     blockDataEnsureCapacity(pUpdateBlock, size);
 
     int32_t rowId = *(int32_t*)taosArrayGet(pInfo->tsArray, pInfo->tsArrayIndex);
-    pInfo->groupId = getGroupId(pInfo->pSnapshotReadOp, pBlock->info.uid);
+    pInfo->groupId = getGroupId(pInfo->pTableScanOp, pBlock->info.uid);
     int32_t i = 0;
     for (; i < size; i++) {
       rowId = *(int32_t*)taosArrayGet(pInfo->tsArray, i + pInfo->tsArrayIndex);
-      uint64_t id = getGroupId(pInfo->pSnapshotReadOp, pBlock->info.uid);
+      uint64_t id = getGroupId(pInfo->pTableScanOp, pBlock->info.uid);
       if (pInfo->groupId != id) {
         break;
       }
@@ -1098,12 +1099,11 @@ static void setUpdateData(SStreamBlockScanInfo* pInfo, SSDataBlock* pBlock, SSDa
   }
 
   if (size == 0) {
-    generateIntervalTs(pInfo, pInfo->pDeleteDataRes, pInfo->pSnapshotReadOp, pUpdateBlock);
+    generateIntervalTs(pInfo, pInfo->pDeleteDataRes, pInfo->pTableScanOp, pUpdateBlock);
   }
 }
 
-static void checkUpdateData(SStreamBlockScanInfo* pInfo, bool invertible, SSDataBlock* pBlock,
-    bool out) {
+static void checkUpdateData(SStreamScanInfo* pInfo, bool invertible, SSDataBlock* pBlock, bool out) {
   SColumnInfoData* pColDataInfo = taosArrayGet(pBlock->pDataBlock, pInfo->primaryTsIndex);
   ASSERT(pColDataInfo->info.type == TSDB_DATA_TYPE_TIMESTAMP);
   TSKEY* ts = (TSKEY*)pColDataInfo->pData;
@@ -1119,15 +1119,15 @@ static void setBlockGroupId(SOperatorInfo* pOperator, SSDataBlock* pBlock, int32
   SColumnInfoData* pColDataInfo = taosArrayGet(pBlock->pDataBlock, uidColIndex);
   uint64_t*        uidCol = (uint64_t*)pColDataInfo->pData;
   ASSERT(pBlock->info.rows > 0);
-  for (int32_t i = 0 ; i < pBlock->info.rows; i++) {
+  for (int32_t i = 0; i < pBlock->info.rows; i++) {
     uidCol[i] = getGroupId(pOperator, uidCol[i]);
   }
 }
 
-static SSDataBlock* doStreamBlockScan(SOperatorInfo* pOperator) {
+static SSDataBlock* doStreamScan(SOperatorInfo* pOperator) {
   // NOTE: this operator does never check if current status is done or not
-  SExecTaskInfo*        pTaskInfo = pOperator->pTaskInfo;
-  SStreamBlockScanInfo* pInfo = pOperator->info;
+  SExecTaskInfo*   pTaskInfo = pOperator->pTaskInfo;
+  SStreamScanInfo* pInfo = pOperator->info;
 
   pTaskInfo->code = pOperator->fpSet._openFn(pOperator);
   if (pTaskInfo->code != TSDB_CODE_SUCCESS || pOperator->status == OP_EXEC_DONE) {
@@ -1145,36 +1145,35 @@ static SSDataBlock* doStreamBlockScan(SOperatorInfo* pOperator) {
 
     int32_t      current = pInfo->validBlockIndex++;
     SSDataBlock* pBlock = taosArrayGetP(pInfo->pBlockLists, current);
+    // TODO move into scan
     blockDataUpdateTsWindow(pBlock, 0);
     switch (pBlock->info.type) {
-    case STREAM_RETRIEVE:{
-      pInfo->blockType = STREAM_INPUT__DATA_SUBMIT;
-      pInfo->scanMode = STREAM_SCAN_FROM_DATAREADER_RETRIEVE;
-      copyDataBlock(pInfo->pPullDataRes, pBlock);
-      pInfo->pullDataResIndex = 0;
-      prepareDataScan(pInfo, pInfo->pPullDataRes, START_TS_COLUMN_INDEX, &pInfo->pullDataResIndex);
-      updateInfoAddCloseWindowSBF(pInfo->pUpdateInfo);
-    }
-      break;
-    case STREAM_DELETE_DATA: {
-      pInfo->blockType = STREAM_INPUT__DATA_SUBMIT;
-      pInfo->updateResIndex = 0;
-      if (isIntervalWindow(pInfo)) {
-        copyDataBlock(pInfo->pDeleteDataRes, pBlock);
-        generateIntervalTs(pInfo, pInfo->pDeleteDataRes, pInfo->pSnapshotReadOp, pInfo->pUpdateRes);
-        prepareDataScan(pInfo, pInfo->pUpdateRes, START_TS_COLUMN_INDEX, &pInfo->updateResIndex);
-        pInfo->scanMode = STREAM_SCAN_FROM_DATAREADER;
-      } else {
-        generateScanRange(pInfo, pBlock, pInfo->pSnapshotReadOp, pInfo->pUpdateRes);
-        prepareRangeScan(pInfo, pInfo->pUpdateRes, &pInfo->updateResIndex);
-        pInfo->scanMode = STREAM_SCAN_FROM_DATAREADER_RANGE;
-      }
-      pInfo->pUpdateRes->info.type = STREAM_DELETE_DATA;
-      return pInfo->pUpdateRes;
-    }
-      break;
-    default:
-      break;
+      case STREAM_RETRIEVE: {
+        pInfo->blockType = STREAM_INPUT__DATA_SUBMIT;
+        pInfo->scanMode = STREAM_SCAN_FROM_DATAREADER_RETRIEVE;
+        copyDataBlock(pInfo->pPullDataRes, pBlock);
+        pInfo->pullDataResIndex = 0;
+        prepareDataScan(pInfo, pInfo->pPullDataRes, START_TS_COLUMN_INDEX, &pInfo->pullDataResIndex);
+        updateInfoAddCloseWindowSBF(pInfo->pUpdateInfo);
+      } break;
+      case STREAM_DELETE_DATA: {
+        pInfo->blockType = STREAM_INPUT__DATA_SUBMIT;
+        pInfo->updateResIndex = 0;
+        if (isIntervalWindow(pInfo)) {
+          copyDataBlock(pInfo->pDeleteDataRes, pBlock);
+          generateIntervalTs(pInfo, pInfo->pDeleteDataRes, pInfo->pTableScanOp, pInfo->pUpdateRes);
+          prepareDataScan(pInfo, pInfo->pUpdateRes, START_TS_COLUMN_INDEX, &pInfo->updateResIndex);
+          pInfo->scanMode = STREAM_SCAN_FROM_DATAREADER;
+        } else {
+          generateScanRange(pInfo, pBlock, pInfo->pTableScanOp, pInfo->pUpdateRes);
+          prepareRangeScan(pInfo, pInfo->pUpdateRes, &pInfo->updateResIndex);
+          pInfo->scanMode = STREAM_SCAN_FROM_DATAREADER_RANGE;
+        }
+        pInfo->pUpdateRes->info.type = STREAM_DELETE_DATA;
+        return pInfo->pUpdateRes;
+      } break;
+      default:
+        break;
     }
     return pBlock;
   } else if (pInfo->blockType == STREAM_INPUT__DATA_SUBMIT) {
@@ -1233,38 +1232,33 @@ static SSDataBlock* doStreamBlockScan(SOperatorInfo* pOperator) {
     SDataBlockInfo* pBlockInfo = &pInfo->pRes->info;
     blockDataCleanup(pInfo->pRes);
 
-    while (tqNextDataBlock(pInfo->streamBlockReader)) {
+    while (tqNextDataBlock(pInfo->tqReader)) {
       SSDataBlock block = {0};
 
       // todo refactor
-      int32_t code = tqRetrieveDataBlock(&block, pInfo->streamBlockReader);
+      int32_t code = tqRetrieveDataBlock(&block, pInfo->tqReader);
 
-      uint64_t groupId = block.info.groupId;
-      uint64_t uid = block.info.uid;
-      int32_t  numOfRows = block.info.rows;
-
-      if (code != TSDB_CODE_SUCCESS || numOfRows == 0) {
+      if (code != TSDB_CODE_SUCCESS || block.info.rows == 0) {
         pTaskInfo->code = code;
         return NULL;
       }
 
-      pInfo->pRes->info.groupId = groupId;
-      pInfo->pRes->info.rows = numOfRows;
-      pInfo->pRes->info.uid = uid;
+      pInfo->pRes->info.rows = block.info.rows;
+      pInfo->pRes->info.uid = block.info.uid;
       pInfo->pRes->info.type = STREAM_NORMAL;
-      pInfo->pRes->info.capacity = numOfRows;
+      pInfo->pRes->info.capacity = block.info.rows;
 
       // for generating rollup SMA result, each time is an independent time serie.
       // TODO temporarily used, when the statement of "partition by tbname" is ready, remove this
       if (pInfo->assignBlockUid) {
-        pInfo->pRes->info.groupId = uid;
-      } else {
-        pInfo->pRes->info.groupId = groupId;
+        pInfo->pRes->info.groupId = block.info.uid;
       }
 
-      uint64_t* groupIdPre = taosHashGet(pOperator->pTaskInfo->tableqinfoList.map, &uid, sizeof(int64_t));
+      uint64_t* groupIdPre = taosHashGet(pOperator->pTaskInfo->tableqinfoList.map, &block.info.uid, sizeof(int64_t));
       if (groupIdPre) {
         pInfo->pRes->info.groupId = *groupIdPre;
+      } else {
+        pInfo->pRes->info.groupId = 0;
       }
 
       // todo extract method
@@ -1333,11 +1327,13 @@ static SSDataBlock* doStreamBlockScan(SOperatorInfo* pOperator) {
         }
       }
     }
+
     return (pBlockInfo->rows == 0) ? NULL : pInfo->pRes;
+
   } else if (pInfo->blockType == STREAM_INPUT__DATA_SCAN) {
     // check reader last status
     // if not match, reset status
-    SSDataBlock* pResult = doTableScan(pInfo->pSnapshotReadOp);
+    SSDataBlock* pResult = doTableScan(pInfo->pTableScanOp);
     return pResult && pResult->info.rows > 0 ? pResult : NULL;
 
   } else {
@@ -1361,8 +1357,8 @@ static SArray* extractTableIdList(const STableListInfo* pTableGroupInfo) {
 SOperatorInfo* createStreamScanOperatorInfo(SReadHandle* pHandle, STableScanPhysiNode* pTableScanNode,
                                             SExecTaskInfo* pTaskInfo, STimeWindowAggSupp* pTwSup, uint64_t queryId,
                                             uint64_t taskId) {
-  SStreamBlockScanInfo* pInfo = taosMemoryCalloc(1, sizeof(SStreamBlockScanInfo));
-  SOperatorInfo*        pOperator = taosMemoryCalloc(1, sizeof(SOperatorInfo));
+  SStreamScanInfo* pInfo = taosMemoryCalloc(1, sizeof(SStreamScanInfo));
+  SOperatorInfo*   pOperator = taosMemoryCalloc(1, sizeof(SOperatorInfo));
 
   if (pInfo == NULL || pOperator == NULL) {
     terrno = TSDB_CODE_QRY_OUT_OF_MEMORY;
@@ -1400,13 +1396,25 @@ SOperatorInfo* createStreamScanOperatorInfo(SReadHandle* pHandle, STableScanPhys
   }
 
   if (pHandle) {
-    SOperatorInfo*  pTableScanDummy = createTableScanOperatorInfo(pTableScanNode, pHandle, pTaskInfo);
-    STableScanInfo* pSTInfo = (STableScanInfo*)pTableScanDummy->info;
+    SOperatorInfo*  pTableScanOp = createTableScanOperatorInfo(pTableScanNode, pHandle, pTaskInfo);
+    STableScanInfo* pSTInfo = (STableScanInfo*)pTableScanOp->info;
 
     SArray* tableList = taosArrayGetP(pTaskInfo->tableqinfoList.pGroupList, 0);
-    if (pHandle->tqReader) {
+    if (pHandle->initTableReader) {
       pSTInfo->scanMode = TABLE_SCAN__TABLE_ORDER;
-      tsdbReaderOpen(pHandle->vnode, &pSTInfo->cond, tableList, &pSTInfo->dataReader, 0);
+      pSTInfo->dataReader = NULL;
+      if (tsdbReaderOpen(pHandle->vnode, &pSTInfo->cond, tableList, &pSTInfo->dataReader, NULL) < 0) {
+        ASSERT(0);
+      }
+    }
+
+    if (pHandle->initTqReader) {
+      ASSERT(pHandle->tqReader == NULL);
+      pInfo->tqReader = tqOpenReader(pHandle->vnode);
+      ASSERT(pInfo->tqReader);
+    } else {
+      ASSERT(pHandle->tqReader);
+      pInfo->tqReader = pHandle->tqReader;
     }
 
     if (pSTInfo->interval.interval > 0) {
@@ -1414,18 +1422,17 @@ SOperatorInfo* createStreamScanOperatorInfo(SReadHandle* pHandle, STableScanPhys
     } else {
       pInfo->pUpdateInfo = NULL;
     }
-    pInfo->pSnapshotReadOp = pTableScanDummy;
+
+    pInfo->pTableScanOp = pTableScanOp;
     pInfo->interval = pSTInfo->interval;
 
     pInfo->readHandle = *pHandle;
-    ASSERT(pHandle->reader);
-    pInfo->streamBlockReader = pHandle->reader;
     pInfo->tableUid = pScanPhyNode->uid;
 
     // set the extract column id to streamHandle
-    tqReadHandleSetColIdList((SStreamReader*)pHandle->reader, pColIds);
+    tqReaderSetColIdList(pInfo->tqReader, pColIds);
     SArray* tableIdList = extractTableIdList(&pTaskInfo->tableqinfoList);
-    int32_t code = tqReadHandleSetTbUidList(pHandle->reader, tableIdList);
+    int32_t code = tqReaderSetTbUidList(pInfo->tqReader, tableIdList);
     if (code != 0) {
       taosArrayDestroy(tableIdList);
       goto _error;
@@ -1449,7 +1456,7 @@ SOperatorInfo* createStreamScanOperatorInfo(SReadHandle* pHandle, STableScanPhys
   pInfo->deleteDataIndex = 0;
   pInfo->pDeleteDataRes = createPullDataBlock();
 
-  pOperator->name = "StreamBlockScanOperator";
+  pOperator->name = "StreamScanOperator";
   pOperator->operatorType = QUERY_NODE_PHYSICAL_PLAN_STREAM_SCAN;
   pOperator->blocking = false;
   pOperator->status = OP_NOT_OPENED;
@@ -1458,7 +1465,7 @@ SOperatorInfo* createStreamScanOperatorInfo(SReadHandle* pHandle, STableScanPhys
   pOperator->pTaskInfo = pTaskInfo;
 
   pOperator->fpSet =
-      createOperatorFpSet(operatorDummyOpenFn, doStreamBlockScan, NULL, NULL, operatorDummyCloseFn, NULL, NULL, NULL);
+      createOperatorFpSet(operatorDummyOpenFn, doStreamScan, NULL, NULL, operatorDummyCloseFn, NULL, NULL, NULL);
 
   return pOperator;
 
diff --git a/source/libs/executor/src/timewindowoperator.c b/source/libs/executor/src/timewindowoperator.c
index deee8b27be..f2a9a13c52 100644
--- a/source/libs/executor/src/timewindowoperator.c
+++ b/source/libs/executor/src/timewindowoperator.c
@@ -1316,7 +1316,7 @@ bool doDeleteIntervalWindow(SAggSupporter* pAggSup, TSKEY ts, uint64_t groupId)
     // window has been closed
     return false;
   }
-  SFilePage* bufPage = getBufPage(pAggSup->pResultBuf, p1->pageId);
+  // SFilePage* bufPage = getBufPage(pAggSup->pResultBuf, p1->pageId);
   // dBufSetBufPageRecycled(pAggSup->pResultBuf, bufPage);
   taosHashRemove(pAggSup->pResultRowHashTable, pAggSup->keyBuf, GET_RES_WINDOW_KEY_LEN(bytes));
   return true;
@@ -1419,7 +1419,7 @@ static int32_t closeIntervalWindow(SHashObj* pHashMap, STimeWindowAggSupp* pSup,
         ASSERT(pRecyPages != NULL);
         taosArrayPush(pRecyPages, &pPos->pageId);
       } else {
-        SFilePage* bufPage = getBufPage(pDiscBuf, pPos->pageId);
+        // SFilePage* bufPage = getBufPage(pDiscBuf, pPos->pageId);
         // dBufSetBufPageRecycled(pDiscBuf, bufPage);
       }
       char keyBuf[GET_RES_WINDOW_KEY_LEN(sizeof(TSKEY))];
@@ -1446,7 +1446,7 @@ static void freeAllPages(SArray* pageIds, SDiskbasedBuf* pDiskBuf) {
   int32_t size = taosArrayGetSize(pageIds);
   for (int32_t i = 0; i < size; i++) {
     int32_t pageId = *(int32_t*)taosArrayGet(pageIds, i);
-    SFilePage* bufPage = getBufPage(pDiskBuf, pageId);
+    // SFilePage* bufPage = getBufPage(pDiskBuf, pageId);
     // dBufSetBufPageRecycled(pDiskBuf, bufPage);
   }
   taosArrayClear(pageIds);
@@ -3023,7 +3023,7 @@ void initDummyFunction(SqlFunctionCtx* pDummy, SqlFunctionCtx* pCtx, int32_t num
 void initDownStream(SOperatorInfo* downstream, SStreamAggSupporter* pAggSup, int64_t gap, int64_t waterMark,
                     uint8_t type) {
   ASSERT(downstream->operatorType == QUERY_NODE_PHYSICAL_PLAN_STREAM_SCAN);
-  SStreamBlockScanInfo* pScanInfo = downstream->info;
+  SStreamScanInfo* pScanInfo = downstream->info;
   pScanInfo->sessionSup = (SessionWindowSupporter){.pStreamAggSup = pAggSup, .gap = gap, .parentType = type};
   pScanInfo->pUpdateInfo = updateInfoInit(60000, TSDB_TIME_PRECISION_MILLI, waterMark);
 }
@@ -3189,7 +3189,7 @@ SResultWindowInfo* getCurSessionWindow(SStreamAggSupporter* pAggSup, TSKEY start
       *pIndex = index + 1;
       return pWin;
     } else if (endTs != INT64_MIN && isInWindow(pWin, endTs, gap)) {
-      *pIndex = index;
+      *pIndex = index + 1;
       return pWin;
     }
   }
@@ -3442,7 +3442,7 @@ void deleteWindow(SArray* pWinInfos, int32_t index) {
   taosArrayRemove(pWinInfos, index);
 }
 
-static void doDeleteSessionWindows(SStreamAggSupporter* pAggSup, SSDataBlock* pBlock, int64_t gap, SArray* result) {
+static void doDeleteTimeWindows(SStreamAggSupporter* pAggSup, SSDataBlock* pBlock, int64_t gap, SArray* result) {
   SColumnInfoData* pStartTsCol = taosArrayGet(pBlock->pDataBlock, START_TS_COLUMN_INDEX);
   TSKEY* startDatas = (TSKEY*)pStartTsCol->pData;
   SColumnInfoData* pEndTsCol = taosArrayGet(pBlock->pDataBlock, END_TS_COLUMN_INDEX);
@@ -3580,8 +3580,8 @@ typedef SResultWindowInfo* (*__get_win_info_)(void*);
 SResultWindowInfo* getResWinForSession(void* pData) { return (SResultWindowInfo*)pData; }
 SResultWindowInfo* getResWinForState(void* pData) { return &((SStateWindowInfo*)pData)->winInfo; }
 
-int32_t closeSessionWindow(SHashObj* pHashMap, STimeWindowAggSupp* pTwSup,
-    SArray* pClosed, __get_win_info_ fn, bool delete) {
+int32_t closeSessionWindow(SHashObj* pHashMap, STimeWindowAggSupp* pTwSup, SArray* pClosed, __get_win_info_ fn,
+                           bool delete) {
   // Todo(liuyao) save window to tdb
   void** pIte = NULL;
   size_t keyLen = 0;
@@ -3700,13 +3700,13 @@ static SSDataBlock* doStreamSessionAgg(SOperatorInfo* pOperator) {
     } else if (pBlock->info.type == STREAM_DELETE_DATA || pBlock->info.type == STREAM_DELETE_RESULT) {
       SArray* pWins = taosArrayInit(16, sizeof(SResultWindowInfo));
       // gap must be 0
-      doDeleteSessionWindows(&pInfo->streamAggSup, pBlock, 0, pWins);
+      doDeleteTimeWindows(&pInfo->streamAggSup, pBlock, 0, pWins);
       if (IS_FINAL_OP(pInfo)) {
         int32_t                        childIndex = getChildIndex(pBlock);
         SOperatorInfo*                 pChildOp = taosArrayGetP(pInfo->pChildren, childIndex);
         SStreamSessionAggOperatorInfo* pChildInfo = pChildOp->info;
         // gap must be 0
-        doDeleteSessionWindows(&pChildInfo->streamAggSup, pBlock, 0, NULL);
+        doDeleteTimeWindows(&pChildInfo->streamAggSup, pBlock, 0, NULL);
         rebuildTimeWindow(pInfo, pWins, pBlock->info.groupId, pOperator->exprSupp.numOfExprs, pOperator);
       }
       copyDeleteWindowInfo(pWins, pInfo->pStDeleted);
@@ -3743,8 +3743,8 @@ static SSDataBlock* doStreamSessionAgg(SOperatorInfo* pOperator) {
   // restore the value
   pOperator->status = OP_RES_TO_RETURN;
 
-  closeSessionWindow(pInfo->streamAggSup.pResultRows, &pInfo->twAggSup, pUpdated,
-      getResWinForSession, pInfo->ignoreExpiredData);
+  closeSessionWindow(pInfo->streamAggSup.pResultRows, &pInfo->twAggSup, pUpdated, getResWinForSession,
+                     pInfo->ignoreExpiredData);
   closeChildSessionWindow(pInfo->pChildren, pInfo->twAggSup.maxTs, pInfo->ignoreExpiredData);
   copyUpdateResult(pStUpdated, pUpdated);
   taosHashCleanup(pStUpdated);
@@ -3840,7 +3840,7 @@ static SSDataBlock* doStreamSessionSemiAgg(SOperatorInfo* pOperator) {
       break;
     } else if (pBlock->info.type == STREAM_DELETE_DATA || pBlock->info.type == STREAM_DELETE_RESULT) {
       // gap must be 0
-      doDeleteSessionWindows(&pInfo->streamAggSup, pBlock, 0, NULL); 
+      doDeleteTimeWindows(&pInfo->streamAggSup, pBlock, 0, NULL); 
       copyDataBlock(pInfo->pDelRes, pBlock);
       pInfo->pDelRes->info.type = STREAM_DELETE_RESULT;
       break;
@@ -4232,6 +4232,12 @@ static SSDataBlock* doStreamStateAgg(SOperatorInfo* pOperator) {
       doClearStateWindows(&pInfo->streamAggSup, pBlock, pInfo->primaryTsIndex, &pInfo->stateCol, pInfo->stateCol.slotId,
                           pSeUpdated, pInfo->pSeDeleted);
       continue;
+    } else if (pBlock->info.type == STREAM_DELETE_DATA) {
+      SArray* pWins = taosArrayInit(16, sizeof(SResultWindowInfo));
+      doDeleteTimeWindows(&pInfo->streamAggSup, pBlock, 0, pWins);
+      copyDeleteWindowInfo(pWins, pInfo->pSeDeleted);
+      taosArrayDestroy(pWins);
+      continue;
     } else if (pBlock->info.type == STREAM_GET_ALL) {
       getAllSessionWindow(pInfo->streamAggSup.pResultRows, pUpdated, getResWinForState);
       continue;
@@ -4245,8 +4251,8 @@ static SSDataBlock* doStreamStateAgg(SOperatorInfo* pOperator) {
   // restore the value
   pOperator->status = OP_RES_TO_RETURN;
 
-  closeSessionWindow(pInfo->streamAggSup.pResultRows, &pInfo->twAggSup, pUpdated,
-      getResWinForState, pInfo->ignoreExpiredData);
+  closeSessionWindow(pInfo->streamAggSup.pResultRows, &pInfo->twAggSup, pUpdated, getResWinForState,
+                     pInfo->ignoreExpiredData);
   closeChildSessionWindow(pInfo->pChildren, pInfo->twAggSup.maxTs, pInfo->ignoreExpiredData);
   copyUpdateResult(pSeUpdated, pUpdated);
   taosHashCleanup(pSeUpdated);
diff --git a/source/libs/stream/inc/streamInc.h b/source/libs/stream/inc/streamInc.h
index 2f41c08354..1629c863d5 100644
--- a/source/libs/stream/inc/streamInc.h
+++ b/source/libs/stream/inc/streamInc.h
@@ -17,6 +17,7 @@
 #define _STREAM_INC_H_
 
 #include "executor.h"
+#include "tref.h"
 #include "tstream.h"
 
 #ifdef __cplusplus
@@ -24,8 +25,9 @@ extern "C" {
 #endif
 
 typedef struct {
-  int8_t inited;
-  void*  timer;
+  int8_t  inited;
+  int32_t refPool;
+  void*   timer;
 } SStreamGlobalEnv;
 
 static SStreamGlobalEnv streamEnv;
diff --git a/source/libs/stream/src/stream.c b/source/libs/stream/src/stream.c
index 56d063ae51..8b8badd67a 100644
--- a/source/libs/stream/src/stream.c
+++ b/source/libs/stream/src/stream.c
@@ -76,9 +76,6 @@ void streamTriggerByTimer(void* param, void* tmrId) {
 
 int32_t streamSetupTrigger(SStreamTask* pTask) {
   if (pTask->triggerParam != 0) {
-    if (streamInit() < 0) {
-      return -1;
-    }
     pTask->timer = taosTmrStart(streamTriggerByTimer, (int32_t)pTask->triggerParam, pTask, streamEnv.timer);
     pTask->triggerStatus = TASK_TRIGGER_STATUS__IN_ACTIVE;
   }
diff --git a/source/libs/sync/inc/syncInt.h b/source/libs/sync/inc/syncInt.h
index 8936cd6ed9..9742f93824 100644
--- a/source/libs/sync/inc/syncInt.h
+++ b/source/libs/sync/inc/syncInt.h
@@ -67,7 +67,6 @@ typedef struct SSyncNode {
   char        path[TSDB_FILENAME_LEN];
   char        raftStorePath[TSDB_FILENAME_LEN * 2];
   char        configPath[TSDB_FILENAME_LEN * 2];
-  int32_t     batchSize;
 
   // sync io
   SWal*         pWal;
diff --git a/source/libs/sync/inc/syncRaftLog.h b/source/libs/sync/inc/syncRaftLog.h
index f3ed9e302b..65ec77e38f 100644
--- a/source/libs/sync/inc/syncRaftLog.h
+++ b/source/libs/sync/inc/syncRaftLog.h
@@ -32,8 +32,8 @@ typedef struct SSyncLogStoreData {
   SSyncNode* pSyncNode;
   SWal*      pWal;
 
-  TdThreadMutex   mutex;
-  SWalReadHandle* pWalHandle;
+  TdThreadMutex mutex;
+  SWalReader*   pWalHandle;
 
   // SyncIndex       beginIndex;  // valid begin index, default 0, may be set beginIndex > 0
 } SSyncLogStoreData;
diff --git a/source/libs/sync/src/syncAppendEntries.c b/source/libs/sync/src/syncAppendEntries.c
index 885ab1acae..2d511b6003 100644
--- a/source/libs/sync/src/syncAppendEntries.c
+++ b/source/libs/sync/src/syncAppendEntries.c
@@ -842,8 +842,8 @@ int32_t syncNodeOnAppendEntriesSnapshot2Cb(SSyncNode* ths, SyncAppendEntriesBatc
       do {
         char logBuf[128];
         snprintf(logBuf, sizeof(logBuf),
-                 "recv sync-append-entries-batch, fake match2, pre-index:%ld, pre-term:%lu, datalen:%d",
-                 pMsg->prevLogIndex, pMsg->prevLogTerm, pMsg->dataLen);
+                 "recv sync-append-entries-batch, fake match2, {pre-index:%ld, pre-term:%lu, datalen:%d, datacount:%d}",
+                 pMsg->prevLogIndex, pMsg->prevLogTerm, pMsg->dataLen, pMsg->dataCount);
         syncNodeEventLog(ths, logBuf);
       } while (0);
 
@@ -876,7 +876,7 @@ int32_t syncNodeOnAppendEntriesSnapshot2Cb(SSyncNode* ths, SyncAppendEntriesBatc
           code = syncNodePreCommit(ths, pAppendEntry);
           ASSERT(code == 0);
 
-          syncEntryDestory(pAppendEntry);
+          // syncEntryDestory(pAppendEntry);
         }
 
         // fsync once
@@ -931,8 +931,8 @@ int32_t syncNodeOnAppendEntriesSnapshot2Cb(SSyncNode* ths, SyncAppendEntriesBatc
       do {
         char logBuf[128];
         snprintf(logBuf, sizeof(logBuf),
-                 "recv sync-append-entries-batch, not match, pre-index:%ld, pre-term:%lu, datalen:%d",
-                 pMsg->prevLogIndex, pMsg->prevLogTerm, pMsg->dataLen);
+                 "recv sync-append-entries-batch, not match, {pre-index:%ld, pre-term:%lu, datalen:%d, datacount:%d}",
+                 pMsg->prevLogIndex, pMsg->prevLogTerm, pMsg->dataLen, pMsg->dataCount);
         syncNodeEventLog(ths, logBuf);
       } while (0);
 
@@ -976,8 +976,9 @@ int32_t syncNodeOnAppendEntriesSnapshot2Cb(SSyncNode* ths, SyncAppendEntriesBatc
 
       do {
         char logBuf[128];
-        snprintf(logBuf, sizeof(logBuf), "recv sync-append-entries, match, pre-index:%ld, pre-term:%lu, datalen:%d",
-                 pMsg->prevLogIndex, pMsg->prevLogTerm, pMsg->dataLen);
+        snprintf(logBuf, sizeof(logBuf),
+                 "recv sync-append-entries, match, {pre-index:%ld, pre-term:%lu, datalen:%d, datacount:%d}",
+                 pMsg->prevLogIndex, pMsg->prevLogTerm, pMsg->dataLen, pMsg->dataCount);
         syncNodeEventLog(ths, logBuf);
       } while (0);
 
@@ -999,7 +1000,7 @@ int32_t syncNodeOnAppendEntriesSnapshot2Cb(SSyncNode* ths, SyncAppendEntriesBatc
           code = syncNodePreCommit(ths, pAppendEntry);
           ASSERT(code == 0);
 
-          syncEntryDestory(pAppendEntry);
+          // syncEntryDestory(pAppendEntry);
         }
 
         // fsync once
diff --git a/source/libs/sync/src/syncAppendEntriesReply.c b/source/libs/sync/src/syncAppendEntriesReply.c
index e4724fc999..3f19b6759e 100644
--- a/source/libs/sync/src/syncAppendEntriesReply.c
+++ b/source/libs/sync/src/syncAppendEntriesReply.c
@@ -174,8 +174,12 @@ int32_t syncNodeOnAppendEntriesReplySnapshot2Cb(SSyncNode* ths, SyncAppendEntrie
     SyncIndex newNextIndex = pMsg->matchIndex + 1;
     SyncIndex newMatchIndex = pMsg->matchIndex;
 
-    if (ths->pLogStore->syncLogExist(ths->pLogStore, newNextIndex) &&
-        ths->pLogStore->syncLogExist(ths->pLogStore, newNextIndex - 1)) {
+    bool needStartSnapshot = false;
+    if (newMatchIndex >= SYNC_INDEX_BEGIN && !ths->pLogStore->syncLogExist(ths->pLogStore, newMatchIndex)) {
+      needStartSnapshot = true;
+    }
+
+    if (!needStartSnapshot) {
       // update next-index, match-index
       syncIndexMgrSetIndex(ths->pNextIndex, &(pMsg->srcId), newNextIndex);
       syncIndexMgrSetIndex(ths->pMatchIndex, &(pMsg->srcId), newMatchIndex);
@@ -197,15 +201,36 @@ int32_t syncNodeOnAppendEntriesReplySnapshot2Cb(SSyncNode* ths, SyncAppendEntrie
       syncIndexMgrSetIndex(ths->pMatchIndex, &(pMsg->srcId), newMatchIndex);
     }
 
+    // event log, update next-index
+    do {
+      char    host[64];
+      int16_t port;
+      syncUtilU642Addr(pMsg->srcId.addr, host, sizeof(host), &port);
+
+      char logBuf[256];
+      snprintf(logBuf, sizeof(logBuf), "reset next-index:%ld, match-index:%ld for %s:%d", newNextIndex, newMatchIndex,
+               host, port);
+      syncNodeEventLog(ths, logBuf);
+
+    } while (0);
+
   } else {
     SyncIndex nextIndex = syncIndexMgrGetIndex(ths->pNextIndex, &(pMsg->srcId));
 
     if (nextIndex > SYNC_INDEX_BEGIN) {
       --nextIndex;
 
-      if (ths->pLogStore->syncLogExist(ths->pLogStore, nextIndex) &&
-          ths->pLogStore->syncLogExist(ths->pLogStore, nextIndex - 1)) {
+      bool needStartSnapshot = false;
+      if (nextIndex >= SYNC_INDEX_BEGIN && !ths->pLogStore->syncLogExist(ths->pLogStore, nextIndex)) {
+        needStartSnapshot = true;
+      }
+      if (nextIndex - 1 >= SYNC_INDEX_BEGIN && !ths->pLogStore->syncLogExist(ths->pLogStore, nextIndex - 1)) {
+        needStartSnapshot = true;
+      }
+
+      if (!needStartSnapshot) {
         // do nothing
+
       } else {
         SSyncRaftEntry* pEntry;
         int32_t         code = ths->pLogStore->syncLogGetEntry(ths->pLogStore, nextIndex, &pEntry);
@@ -227,6 +252,21 @@ int32_t syncNodeOnAppendEntriesReplySnapshot2Cb(SSyncNode* ths, SyncAppendEntrie
       nextIndex = SYNC_INDEX_BEGIN;
     }
     syncIndexMgrSetIndex(ths->pNextIndex, &(pMsg->srcId), nextIndex);
+
+    // event log, update next-index
+    do {
+      char    host[64];
+      int16_t port;
+      syncUtilU642Addr(pMsg->srcId.addr, host, sizeof(host), &port);
+
+      SyncIndex newNextIndex = nextIndex;
+      SyncIndex newMatchIndex = syncIndexMgrGetIndex(ths->pMatchIndex, &(pMsg->srcId));
+      char      logBuf[256];
+      snprintf(logBuf, sizeof(logBuf), "reset2 next-index:%ld, match-index:%ld for %s:%d", newNextIndex, newMatchIndex,
+               host, port);
+      syncNodeEventLog(ths, logBuf);
+
+    } while (0);
   }
 
   return 0;
diff --git a/source/libs/sync/src/syncMain.c b/source/libs/sync/src/syncMain.c
index cc6057b031..5951078822 100644
--- a/source/libs/sync/src/syncMain.c
+++ b/source/libs/sync/src/syncMain.c
@@ -1526,12 +1526,14 @@ void syncNodeEventLog(const SSyncNode* pSyncNode, char* str) {
     if (pSyncNode != NULL && pSyncNode->pRaftCfg != NULL && pSyncNode->pRaftStore != NULL) {
       snprintf(logBuf, sizeof(logBuf),
                "vgId:%d, sync %s %s, term:%lu, commit:%ld, beginlog:%ld, lastlog:%ld, lastsnapshot:%ld, standby:%d, "
+               "strategy:%d, batch:%d, "
                "replica-num:%d, "
                "lconfig:%ld, changing:%d, restore:%d, %s",
                pSyncNode->vgId, syncUtilState2String(pSyncNode->state), str, pSyncNode->pRaftStore->currentTerm,
                pSyncNode->commitIndex, logBeginIndex, logLastIndex, snapshot.lastApplyIndex,
-               pSyncNode->pRaftCfg->isStandBy, pSyncNode->replicaNum, pSyncNode->pRaftCfg->lastConfigIndex,
-               pSyncNode->changing, pSyncNode->restoreFinish, printStr);
+               pSyncNode->pRaftCfg->isStandBy, pSyncNode->pRaftCfg->snapshotStrategy, pSyncNode->pRaftCfg->batchSize,
+               pSyncNode->replicaNum, pSyncNode->pRaftCfg->lastConfigIndex, pSyncNode->changing,
+               pSyncNode->restoreFinish, printStr);
     } else {
       snprintf(logBuf, sizeof(logBuf), "%s", str);
     }
@@ -1543,12 +1545,14 @@ void syncNodeEventLog(const SSyncNode* pSyncNode, char* str) {
     if (pSyncNode != NULL && pSyncNode->pRaftCfg != NULL && pSyncNode->pRaftStore != NULL) {
       snprintf(s, len,
                "vgId:%d, sync %s %s, term:%lu, commit:%ld, beginlog:%ld, lastlog:%ld, lastsnapshot:%ld, standby:%d, "
+               "strategy:%d, batch:%d, "
                "replica-num:%d, "
                "lconfig:%ld, changing:%d, restore:%d, %s",
                pSyncNode->vgId, syncUtilState2String(pSyncNode->state), str, pSyncNode->pRaftStore->currentTerm,
                pSyncNode->commitIndex, logBeginIndex, logLastIndex, snapshot.lastApplyIndex,
-               pSyncNode->pRaftCfg->isStandBy, pSyncNode->replicaNum, pSyncNode->pRaftCfg->lastConfigIndex,
-               pSyncNode->changing, pSyncNode->restoreFinish, printStr);
+               pSyncNode->pRaftCfg->isStandBy, pSyncNode->pRaftCfg->snapshotStrategy, pSyncNode->pRaftCfg->batchSize,
+               pSyncNode->replicaNum, pSyncNode->pRaftCfg->lastConfigIndex, pSyncNode->changing,
+               pSyncNode->restoreFinish, printStr);
     } else {
       snprintf(s, len, "%s", str);
     }
diff --git a/source/libs/sync/src/syncMessage.c b/source/libs/sync/src/syncMessage.c
index e53b9d5e36..697c25f304 100644
--- a/source/libs/sync/src/syncMessage.c
+++ b/source/libs/sync/src/syncMessage.c
@@ -1605,7 +1605,7 @@ void syncAppendEntriesLog2(char* s, const SyncAppendEntries* pMsg) {
 
 SyncAppendEntriesBatch* syncAppendEntriesBatchBuild(SSyncRaftEntry** entryPArr, int32_t arrSize, int32_t vgId) {
   ASSERT(entryPArr != NULL);
-  ASSERT(arrSize > 0);
+  ASSERT(arrSize >= 0);
 
   int32_t dataLen = 0;
   int32_t metaArrayLen = sizeof(SOffsetAndContLen) * arrSize;  // <offset, contLen>
diff --git a/source/libs/sync/src/syncRaftCfg.c b/source/libs/sync/src/syncRaftCfg.c
index ead1168632..6c381f6e7d 100644
--- a/source/libs/sync/src/syncRaftCfg.c
+++ b/source/libs/sync/src/syncRaftCfg.c
@@ -101,7 +101,7 @@ cJSON *syncCfg2Json(SSyncCfg *pSyncCfg) {
 
 char *syncCfg2Str(SSyncCfg *pSyncCfg) {
   cJSON *pJson = syncCfg2Json(pSyncCfg);
-  char * serialized = cJSON_Print(pJson);
+  char  *serialized = cJSON_Print(pJson);
   cJSON_Delete(pJson);
   return serialized;
 }
@@ -109,7 +109,7 @@ char *syncCfg2Str(SSyncCfg *pSyncCfg) {
 char *syncCfg2SimpleStr(SSyncCfg *pSyncCfg) {
   if (pSyncCfg != NULL) {
     int32_t len = 512;
-    char *  s = taosMemoryMalloc(len);
+    char   *s = taosMemoryMalloc(len);
     memset(s, 0, len);
 
     snprintf(s, len, "{replica-num:%d, my-index:%d, ", pSyncCfg->replicaNum, pSyncCfg->myIndex);
@@ -206,7 +206,7 @@ cJSON *raftCfg2Json(SRaftCfg *pRaftCfg) {
 
 char *raftCfg2Str(SRaftCfg *pRaftCfg) {
   cJSON *pJson = raftCfg2Json(pRaftCfg);
-  char * serialized = cJSON_Print(pJson);
+  char  *serialized = cJSON_Print(pJson);
   cJSON_Delete(pJson);
   return serialized;
 }
@@ -285,7 +285,7 @@ int32_t raftCfgFromJson(const cJSON *pRoot, SRaftCfg *pRaftCfg) {
     (pRaftCfg->configIndexArr)[i] = atoll(pIndex->valuestring);
   }
 
-  cJSON * pJsonSyncCfg = cJSON_GetObjectItem(pJson, "SSyncCfg");
+  cJSON  *pJsonSyncCfg = cJSON_GetObjectItem(pJson, "SSyncCfg");
   int32_t code = syncCfgFromJson(pJsonSyncCfg, &(pRaftCfg->cfg));
   ASSERT(code == 0);
 
diff --git a/source/libs/sync/src/syncRaftLog.c b/source/libs/sync/src/syncRaftLog.c
index 83495e7486..c5d339b08f 100644
--- a/source/libs/sync/src/syncRaftLog.c
+++ b/source/libs/sync/src/syncRaftLog.c
@@ -62,7 +62,7 @@ SSyncLogStore* logStoreCreate(SSyncNode* pSyncNode) {
   ASSERT(pData->pWal != NULL);
 
   taosThreadMutexInit(&(pData->mutex), NULL);
-  pData->pWalHandle = walOpenReadHandle(pData->pWal);
+  pData->pWalHandle = walOpenReader(pData->pWal, NULL);
   ASSERT(pData->pWalHandle != NULL);
 
   pLogStore->appendEntry = logStoreAppendEntry;
@@ -95,7 +95,7 @@ void logStoreDestory(SSyncLogStore* pLogStore) {
 
     taosThreadMutexLock(&(pData->mutex));
     if (pData->pWalHandle != NULL) {
-      walCloseReadHandle(pData->pWalHandle);
+      walCloseReader(pData->pWalHandle);
       pData->pWalHandle = NULL;
     }
     taosThreadMutexUnlock(&(pData->mutex));
@@ -255,7 +255,7 @@ static int32_t raftLogGetEntry(struct SSyncLogStore* pLogStore, SyncIndex index,
   *ppEntry = NULL;
 
   // SWalReadHandle* pWalHandle = walOpenReadHandle(pWal);
-  SWalReadHandle* pWalHandle = pData->pWalHandle;
+  SWalReader* pWalHandle = pData->pWalHandle;
   if (pWalHandle == NULL) {
     terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
     return -1;
@@ -263,7 +263,7 @@ static int32_t raftLogGetEntry(struct SSyncLogStore* pLogStore, SyncIndex index,
 
   taosThreadMutexLock(&(pData->mutex));
 
-  code = walReadWithHandle(pWalHandle, index);
+  code = walReadVer(pWalHandle, index);
   if (code != 0) {
     int32_t     err = terrno;
     const char* errStr = tstrerror(err);
@@ -398,10 +398,10 @@ SSyncRaftEntry* logStoreGetEntry(SSyncLogStore* pLogStore, SyncIndex index) {
     taosThreadMutexLock(&(pData->mutex));
 
     // SWalReadHandle* pWalHandle = walOpenReadHandle(pWal);
-    SWalReadHandle* pWalHandle = pData->pWalHandle;
+    SWalReader* pWalHandle = pData->pWalHandle;
     ASSERT(pWalHandle != NULL);
 
-    int32_t code = walReadWithHandle(pWalHandle, index);
+    int32_t code = walReadVer(pWalHandle, index);
     if (code != 0) {
       int32_t     err = terrno;
       const char* errStr = tstrerror(err);
diff --git a/source/libs/sync/src/syncReplication.c b/source/libs/sync/src/syncReplication.c
index da31e9c4c4..17d9aeaea0 100644
--- a/source/libs/sync/src/syncReplication.c
+++ b/source/libs/sync/src/syncReplication.c
@@ -148,9 +148,17 @@ int32_t syncNodeAppendEntriesPeersSnapshot2(SSyncNode* pSyncNode) {
     // get entry batch
     int32_t   getCount = 0;
     SyncIndex getEntryIndex = nextIndex;
-    for (int32_t i = 0; i < pSyncNode->batchSize; ++i) {
+    for (int32_t i = 0; i < pSyncNode->pRaftCfg->batchSize; ++i) {
       SSyncRaftEntry* pEntry = NULL;
       int32_t         code = pSyncNode->pLogStore->syncLogGetEntry(pSyncNode->pLogStore, getEntryIndex, &pEntry);
+
+      // event log
+      do {
+        char logBuf[128];
+        snprintf(logBuf, sizeof(logBuf), "get index:%d, code:%d, %s", getEntryIndex, code, tstrerror(terrno));
+        syncNodeEventLog(pSyncNode, logBuf);
+      } while (0);
+
       if (code == 0) {
         ASSERT(pEntry != NULL);
         entryPArr[i] = pEntry;
@@ -162,12 +170,19 @@ int32_t syncNodeAppendEntriesPeersSnapshot2(SSyncNode* pSyncNode) {
       }
     }
 
+    // event log
+    do {
+      char logBuf[128];
+      snprintf(logBuf, sizeof(logBuf), "build batch:%d", getCount);
+      syncNodeEventLog(pSyncNode, logBuf);
+    } while (0);
+
     // build msg
     SyncAppendEntriesBatch* pMsg = syncAppendEntriesBatchBuild(entryPArr, getCount, pSyncNode->vgId);
     ASSERT(pMsg != NULL);
 
     // free entries
-    for (int32_t i = 0; i < pSyncNode->batchSize; ++i) {
+    for (int32_t i = 0; i < pSyncNode->pRaftCfg->batchSize; ++i) {
       SSyncRaftEntry* pEntry = entryPArr[i];
       if (pEntry != NULL) {
         syncEntryDestory(pEntry);
diff --git a/source/common/src/tmsgcb.c b/source/libs/transport/src/tmsgcb.c
similarity index 79%
rename from source/common/src/tmsgcb.c
rename to source/libs/transport/src/tmsgcb.c
index b8eec655b1..aefc25fab4 100644
--- a/source/common/src/tmsgcb.c
+++ b/source/libs/transport/src/tmsgcb.c
@@ -16,20 +16,33 @@
 #define _DEFAULT_SOURCE
 #include "tmsgcb.h"
 #include "taoserror.h"
+#include "trpc.h"
 
 static SMsgCb defaultMsgCb;
 
 void tmsgSetDefault(const SMsgCb* msgcb) { defaultMsgCb = *msgcb; }
 
 int32_t tmsgPutToQueue(const SMsgCb* msgcb, EQueueType qtype, SRpcMsg* pMsg) {
-  return (*msgcb->putToQueueFp)(msgcb->mgmt, qtype, pMsg);
+  int32_t code = (*msgcb->putToQueueFp)(msgcb->mgmt, qtype, pMsg);
+  if (code != 0) {
+    rpcFreeCont(pMsg->pCont);
+    pMsg->pCont = NULL;
+  }
+  return code;
 }
 
 int32_t tmsgGetQueueSize(const SMsgCb* msgcb, int32_t vgId, EQueueType qtype) {
   return (*msgcb->qsizeFp)(msgcb->mgmt, vgId, qtype);
 }
 
-int32_t tmsgSendReq(const SEpSet* epSet, SRpcMsg* pMsg) { return (*defaultMsgCb.sendReqFp)(epSet, pMsg); }
+int32_t tmsgSendReq(const SEpSet* epSet, SRpcMsg* pMsg) {
+  int32_t code = (*defaultMsgCb.sendReqFp)(epSet, pMsg);
+  if (code != 0) {
+    rpcFreeCont(pMsg->pCont);
+    pMsg->pCont = NULL;
+  }
+  return code;
+}
 
 void tmsgSendRsp(SRpcMsg* pMsg) { return (*defaultMsgCb.sendRspFp)(pMsg); }
 
diff --git a/source/libs/transport/src/transCli.c b/source/libs/transport/src/transCli.c
index 8b771f6f8a..4b6ff43ba8 100644
--- a/source/libs/transport/src/transCli.c
+++ b/source/libs/transport/src/transCli.c
@@ -573,8 +573,8 @@ static void cliRecvCb(uv_stream_t* handle, ssize_t nread, const uv_buf_t* buf) {
     return;
   }
   if (nread < 0) {
-    tError("%s conn %p read error: %s, ref: %d", CONN_GET_INST_LABEL(conn), conn, uv_err_name(nread),
-           T_REF_VAL_GET(conn));
+    tWarn("%s conn %p read error: %s, ref: %d", CONN_GET_INST_LABEL(conn), conn, uv_err_name(nread),
+          T_REF_VAL_GET(conn));
     conn->broken = true;
     cliHandleExcept(conn);
   }
diff --git a/source/libs/transport/src/transSvr.c b/source/libs/transport/src/transSvr.c
index 3f4a5628f9..b805aa929c 100644
--- a/source/libs/transport/src/transSvr.c
+++ b/source/libs/transport/src/transSvr.c
@@ -305,7 +305,7 @@ void uvOnRecvCb(uv_stream_t* cli, ssize_t nread, const uv_buf_t* buf) {
     return;
   }
 
-  tError("%s conn %p read error: %s", transLabel(pTransInst), conn, uv_err_name(nread));
+  tWarn("%s conn %p read error: %s", transLabel(pTransInst), conn, uv_err_name(nread));
   if (nread < 0) {
     conn->broken = true;
     if (conn->status == ConnAcquire) {
diff --git a/source/libs/wal/inc/walInt.h b/source/libs/wal/inc/walInt.h
index c23d0802c1..2767780ff3 100644
--- a/source/libs/wal/inc/walInt.h
+++ b/source/libs/wal/inc/walInt.h
@@ -19,6 +19,7 @@
 #include "taoserror.h"
 #include "tchecksum.h"
 #include "tcoding.h"
+#include "tcommon.h"
 #include "tcompare.h"
 #include "wal.h"
 
diff --git a/source/libs/wal/src/walRead.c b/source/libs/wal/src/walRead.c
index e7f0b31ccc..b5c75ce3c4 100644
--- a/source/libs/wal/src/walRead.c
+++ b/source/libs/wal/src/walRead.c
@@ -16,20 +16,29 @@
 #include "taoserror.h"
 #include "walInt.h"
 
-SWalReadHandle *walOpenReadHandle(SWal *pWal) {
-  SWalReadHandle *pRead = taosMemoryMalloc(sizeof(SWalReadHandle));
+static int32_t walFetchHeadNew(SWalReader *pRead, int64_t fetchVer);
+static int32_t walFetchBodyNew(SWalReader *pRead);
+static int32_t walSkipFetchBodyNew(SWalReader *pRead);
+
+SWalReader *walOpenReader(SWal *pWal, SWalFilterCond *cond) {
+  SWalReader *pRead = taosMemoryMalloc(sizeof(SWalReader));
   if (pRead == NULL) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     return NULL;
   }
 
   pRead->pWal = pWal;
-  pRead->pReadIdxTFile = NULL;
-  pRead->pReadLogTFile = NULL;
+  pRead->pIdxFile = NULL;
+  pRead->pLogFile = NULL;
   pRead->curVersion = -1;
   pRead->curFileFirstVer = -1;
   pRead->capacity = 0;
-  pRead->status = 0;
+  if (cond)
+    pRead->cond = *cond;
+  else {
+    pRead->cond.scanMeta = 0;
+    pRead->cond.scanUncommited = 0;
+  }
 
   taosThreadMutexInit(&pRead->mutex, NULL);
 
@@ -39,26 +48,46 @@ SWalReadHandle *walOpenReadHandle(SWal *pWal) {
     taosMemoryFree(pRead);
     return NULL;
   }
+
   return pRead;
 }
 
-void walCloseReadHandle(SWalReadHandle *pRead) {
-  taosCloseFile(&pRead->pReadIdxTFile);
-  taosCloseFile(&pRead->pReadLogTFile);
+void walCloseReader(SWalReader *pRead) {
+  taosCloseFile(&pRead->pIdxFile);
+  taosCloseFile(&pRead->pLogFile);
   taosMemoryFreeClear(pRead->pHead);
   taosMemoryFree(pRead);
 }
 
-int32_t walRegisterRead(SWalReadHandle *pRead, int64_t ver) {
-  // TODO
-  return 0;
+int32_t walNextValidMsg(SWalReader *pRead) {
+  int64_t fetchVer = pRead->curVersion;
+  int64_t endVer = pRead->cond.scanUncommited ? walGetLastVer(pRead->pWal) : walGetCommittedVer(pRead->pWal);
+  while (fetchVer <= endVer) {
+    if (walFetchHeadNew(pRead, fetchVer) < 0) {
+      return -1;
+    }
+    if (pRead->pHead->head.msgType == TDMT_VND_SUBMIT ||
+        (IS_META_MSG(pRead->pHead->head.msgType) && pRead->cond.scanMeta)) {
+      if (walFetchBodyNew(pRead) < 0) {
+        return -1;
+      }
+      return 0;
+    } else {
+      if (walSkipFetchBodyNew(pRead) < 0) {
+        return -1;
+      }
+      fetchVer++;
+      ASSERT(fetchVer == pRead->curVersion);
+    }
+  }
+  return -1;
 }
 
-static int64_t walReadSeekFilePos(SWalReadHandle *pRead, int64_t fileFirstVer, int64_t ver) {
+static int64_t walReadSeekFilePos(SWalReader *pRead, int64_t fileFirstVer, int64_t ver) {
   int64_t ret = 0;
 
-  TdFilePtr pIdxTFile = pRead->pReadIdxTFile;
-  TdFilePtr pLogTFile = pRead->pReadLogTFile;
+  TdFilePtr pIdxTFile = pRead->pIdxFile;
+  TdFilePtr pLogTFile = pRead->pLogFile;
 
   // seek position
   int64_t offset = (ver - fileFirstVer) * sizeof(SWalIdxEntry);
@@ -90,11 +119,11 @@ static int64_t walReadSeekFilePos(SWalReadHandle *pRead, int64_t fileFirstVer, i
   return ret;
 }
 
-static int32_t walReadChangeFile(SWalReadHandle *pRead, int64_t fileFirstVer) {
+static int32_t walReadChangeFile(SWalReader *pRead, int64_t fileFirstVer) {
   char fnameStr[WAL_FILE_LEN];
 
-  taosCloseFile(&pRead->pReadIdxTFile);
-  taosCloseFile(&pRead->pReadLogTFile);
+  taosCloseFile(&pRead->pIdxFile);
+  taosCloseFile(&pRead->pLogFile);
 
   walBuildLogName(pRead->pWal, fileFirstVer, fnameStr);
   TdFilePtr pLogTFile = taosOpenFile(fnameStr, TD_FILE_READ);
@@ -104,7 +133,7 @@ static int32_t walReadChangeFile(SWalReadHandle *pRead, int64_t fileFirstVer) {
     return -1;
   }
 
-  pRead->pReadLogTFile = pLogTFile;
+  pRead->pLogFile = pLogTFile;
 
   walBuildIdxName(pRead->pWal, fileFirstVer, fnameStr);
   TdFilePtr pIdxTFile = taosOpenFile(fnameStr, TD_FILE_READ);
@@ -114,11 +143,11 @@ static int32_t walReadChangeFile(SWalReadHandle *pRead, int64_t fileFirstVer) {
     return -1;
   }
 
-  pRead->pReadIdxTFile = pIdxTFile;
+  pRead->pIdxFile = pIdxTFile;
   return 0;
 }
 
-static int32_t walReadSeekVer(SWalReadHandle *pRead, int64_t ver) {
+static int32_t walReadSeekVer(SWalReader *pRead, int64_t ver) {
   SWal *pWal = pRead->pWal;
   if (ver == pRead->curVersion) {
     return 0;
@@ -153,9 +182,94 @@ static int32_t walReadSeekVer(SWalReadHandle *pRead, int64_t ver) {
   return 0;
 }
 
-void walSetReaderCapacity(SWalReadHandle *pRead, int32_t capacity) { pRead->capacity = capacity; }
+void walSetReaderCapacity(SWalReader *pRead, int32_t capacity) { pRead->capacity = capacity; }
 
-int32_t walFetchHead(SWalReadHandle *pRead, int64_t ver, SWalCkHead *pHead) {
+static int32_t walFetchHeadNew(SWalReader *pRead, int64_t fetchVer) {
+  int64_t contLen;
+  if (pRead->curVersion != fetchVer) {
+    if (walReadSeekVer(pRead, fetchVer) < 0) return -1;
+  }
+  contLen = taosReadFile(pRead->pLogFile, pRead->pHead, sizeof(SWalCkHead));
+  if (contLen != sizeof(SWalCkHead)) {
+    if (contLen < 0) {
+      terrno = TAOS_SYSTEM_ERROR(errno);
+    } else {
+      terrno = TSDB_CODE_WAL_FILE_CORRUPTED;
+    }
+    pRead->curVersion = -1;
+    return -1;
+  }
+  return 0;
+}
+
+static int32_t walFetchBodyNew(SWalReader *pRead) {
+  SWalCont *pReadHead = &pRead->pHead->head;
+  int64_t   ver = pReadHead->version;
+
+  if (pRead->capacity < pReadHead->bodyLen) {
+    void *ptr = taosMemoryRealloc(pRead->pHead, sizeof(SWalCkHead) + pReadHead->bodyLen);
+    if (ptr == NULL) {
+      terrno = TSDB_CODE_WAL_OUT_OF_MEMORY;
+      return -1;
+    }
+    pRead->pHead = ptr;
+    pReadHead = &pRead->pHead->head;
+    pRead->capacity = pReadHead->bodyLen;
+  }
+
+  if (pReadHead->bodyLen != taosReadFile(pRead->pLogFile, pReadHead->body, pReadHead->bodyLen)) {
+    if (pReadHead->bodyLen < 0) {
+      terrno = TAOS_SYSTEM_ERROR(errno);
+      wError("wal fetch body error: %" PRId64 ", read request version:%" PRId64 ", since %s",
+             pRead->pHead->head.version, ver, tstrerror(terrno));
+    } else {
+      wError("wal fetch body error: %" PRId64 ", read request version:%" PRId64 ", since file corrupted",
+             pRead->pHead->head.version, ver);
+      terrno = TSDB_CODE_WAL_FILE_CORRUPTED;
+    }
+    pRead->curVersion = -1;
+    ASSERT(0);
+    return -1;
+  }
+
+  if (pReadHead->version != ver) {
+    wError("wal fetch body error: %" PRId64 ", read request version:%" PRId64 "", pRead->pHead->head.version, ver);
+    pRead->curVersion = -1;
+    terrno = TSDB_CODE_WAL_FILE_CORRUPTED;
+    ASSERT(0);
+    return -1;
+  }
+
+  if (walValidBodyCksum(pRead->pHead) != 0) {
+    wError("wal fetch body error: % " PRId64 ", since body checksum not passed", ver);
+    pRead->curVersion = -1;
+    terrno = TSDB_CODE_WAL_FILE_CORRUPTED;
+    ASSERT(0);
+    return -1;
+  }
+
+  pRead->curVersion = ver + 1;
+  return 0;
+}
+
+static int32_t walSkipFetchBodyNew(SWalReader *pRead) {
+  int64_t code;
+
+  ASSERT(pRead->curVersion == pRead->pHead->head.version);
+
+  code = taosLSeekFile(pRead->pLogFile, pRead->pHead->head.bodyLen, SEEK_CUR);
+  if (code < 0) {
+    terrno = TAOS_SYSTEM_ERROR(errno);
+    pRead->curVersion = -1;
+    return -1;
+  }
+
+  pRead->curVersion++;
+
+  return 0;
+}
+
+int32_t walFetchHead(SWalReader *pRead, int64_t ver, SWalCkHead *pHead) {
   int64_t code;
 
   // TODO: valid ver
@@ -168,9 +282,9 @@ int32_t walFetchHead(SWalReadHandle *pRead, int64_t ver, SWalCkHead *pHead) {
     if (code < 0) return -1;
   }
 
-  ASSERT(taosValidFile(pRead->pReadLogTFile) == true);
+  ASSERT(taosValidFile(pRead->pLogFile) == true);
 
-  code = taosReadFile(pRead->pReadLogTFile, pHead, sizeof(SWalCkHead));
+  code = taosReadFile(pRead->pLogFile, pHead, sizeof(SWalCkHead));
   if (code != sizeof(SWalCkHead)) {
     return -1;
   }
@@ -186,12 +300,12 @@ int32_t walFetchHead(SWalReadHandle *pRead, int64_t ver, SWalCkHead *pHead) {
   return 0;
 }
 
-int32_t walSkipFetchBody(SWalReadHandle *pRead, const SWalCkHead *pHead) {
+int32_t walSkipFetchBody(SWalReader *pRead, const SWalCkHead *pHead) {
   int64_t code;
 
   ASSERT(pRead->curVersion == pHead->head.version);
 
-  code = taosLSeekFile(pRead->pReadLogTFile, pHead->head.bodyLen, SEEK_CUR);
+  code = taosLSeekFile(pRead->pLogFile, pHead->head.bodyLen, SEEK_CUR);
   if (code < 0) {
     terrno = TAOS_SYSTEM_ERROR(errno);
     pRead->curVersion = -1;
@@ -203,7 +317,7 @@ int32_t walSkipFetchBody(SWalReadHandle *pRead, const SWalCkHead *pHead) {
   return 0;
 }
 
-int32_t walFetchBody(SWalReadHandle *pRead, SWalCkHead **ppHead) {
+int32_t walFetchBody(SWalReader *pRead, SWalCkHead **ppHead) {
   SWalCont *pReadHead = &((*ppHead)->head);
   int64_t   ver = pReadHead->version;
 
@@ -218,7 +332,7 @@ int32_t walFetchBody(SWalReadHandle *pRead, SWalCkHead **ppHead) {
     pRead->capacity = pReadHead->bodyLen;
   }
 
-  if (pReadHead->bodyLen != taosReadFile(pRead->pReadLogTFile, pReadHead->body, pReadHead->bodyLen)) {
+  if (pReadHead->bodyLen != taosReadFile(pRead->pLogFile, pReadHead->body, pReadHead->bodyLen)) {
     ASSERT(0);
     return -1;
   }
@@ -241,9 +355,9 @@ int32_t walFetchBody(SWalReadHandle *pRead, SWalCkHead **ppHead) {
   return 0;
 }
 
-int32_t walReadWithHandle_s(SWalReadHandle *pRead, int64_t ver, SWalCont **ppHead) {
+int32_t walReadWithHandle_s(SWalReader *pRead, int64_t ver, SWalCont **ppHead) {
   taosThreadMutexLock(&pRead->mutex);
-  if (walReadWithHandle(pRead, ver) < 0) {
+  if (walReadVer(pRead, ver) < 0) {
     taosThreadMutexUnlock(&pRead->mutex);
     return -1;
   }
@@ -257,7 +371,7 @@ int32_t walReadWithHandle_s(SWalReadHandle *pRead, int64_t ver, SWalCont **ppHea
   return 0;
 }
 
-int32_t walReadWithHandle(SWalReadHandle *pRead, int64_t ver) {
+int32_t walReadVer(SWalReader *pRead, int64_t ver) {
   int64_t code;
 
   if (pRead->pWal->vers.firstVer == -1) {
@@ -280,9 +394,9 @@ int32_t walReadWithHandle(SWalReadHandle *pRead, int64_t ver) {
     return -1;
   }
 
-  ASSERT(taosValidFile(pRead->pReadLogTFile) == true);
+  ASSERT(taosValidFile(pRead->pLogFile) == true);
 
-  code = taosReadFile(pRead->pReadLogTFile, pRead->pHead, sizeof(SWalCkHead));
+  code = taosReadFile(pRead->pLogFile, pRead->pHead, sizeof(SWalCkHead));
   if (code != sizeof(SWalCkHead)) {
     if (code < 0)
       terrno = TAOS_SYSTEM_ERROR(errno);
@@ -310,7 +424,7 @@ int32_t walReadWithHandle(SWalReadHandle *pRead, int64_t ver) {
     pRead->capacity = pRead->pHead->head.bodyLen;
   }
 
-  if ((code = taosReadFile(pRead->pReadLogTFile, pRead->pHead->head.body, pRead->pHead->head.bodyLen)) !=
+  if ((code = taosReadFile(pRead->pLogFile, pRead->pHead->head.body, pRead->pHead->head.bodyLen)) !=
       pRead->pHead->head.bodyLen) {
     if (code < 0)
       terrno = TAOS_SYSTEM_ERROR(errno);
@@ -340,46 +454,3 @@ int32_t walReadWithHandle(SWalReadHandle *pRead, int64_t ver) {
 
   return 0;
 }
-
-#if 0
-int32_t walRead(SWal *pWal, SWalHead **ppHead, int64_t ver) {
-  int code;
-  code = walSeekVer(pWal, ver);
-  if (code != 0) {
-    return code;
-  }
-  if (*ppHead == NULL) {
-    void *ptr = taosMemoryRealloc(*ppHead, sizeof(SWalHead));
-    if (ptr == NULL) {
-      return -1;
-    }
-    *ppHead = ptr;
-  }
-  if (tfRead(pWal->pWriteLogTFile, *ppHead, sizeof(SWalHead)) != sizeof(SWalHead)) {
-    return -1;
-  }
-  // TODO: endian compatibility processing after read
-  if (walValidHeadCksum(*ppHead) != 0) {
-    return -1;
-  }
-  void *ptr = taosMemoryRealloc(*ppHead, sizeof(SWalHead) + (*ppHead)->head.len);
-  if (ptr == NULL) {
-    taosMemoryFree(*ppHead);
-    *ppHead = NULL;
-    return -1;
-  }
-  if (tfRead(pWal->pWriteLogTFile, (*ppHead)->head.body, (*ppHead)->head.len) != (*ppHead)->head.len) {
-    return -1;
-  }
-  // TODO: endian compatibility processing after read
-  if (walValidBodyCksum(*ppHead) != 0) {
-    return -1;
-  }
-
-  return 0;
-}
-
-int32_t walReadWithFp(SWal *pWal, FWalWrite writeFp, int64_t verStart, int32_t readNum) {
-return 0;
-}
-#endif
diff --git a/source/libs/wal/src/walWrite.c b/source/libs/wal/src/walWrite.c
index 27f12259bc..445cdea45b 100644
--- a/source/libs/wal/src/walWrite.c
+++ b/source/libs/wal/src/walWrite.c
@@ -79,19 +79,21 @@ int32_t walCommit(SWal *pWal, int64_t ver) {
 }
 
 int32_t walRollback(SWal *pWal, int64_t ver) {
+  taosThreadMutexLock(&pWal->mutex);
   int64_t code;
   char    fnameStr[WAL_FILE_LEN];
   if (ver > pWal->vers.lastVer || ver < pWal->vers.commitVer) {
     terrno = TSDB_CODE_WAL_INVALID_VER;
+    taosThreadMutexUnlock(&pWal->mutex);
     return -1;
   }
-  taosThreadMutexLock(&pWal->mutex);
 
   // find correct file
   if (ver < walGetLastFileFirstVer(pWal)) {
     // change current files
     code = walChangeWrite(pWal, ver);
     if (code < 0) {
+      taosThreadMutexUnlock(&pWal->mutex);
       return -1;
     }
 
@@ -146,6 +148,7 @@ int32_t walRollback(SWal *pWal, int64_t ver) {
   ASSERT(taosValidFile(pLogTFile));
   int64_t size = taosReadFile(pLogTFile, &head, sizeof(SWalCkHead));
   if (size != sizeof(SWalCkHead)) {
+    taosThreadMutexUnlock(&pWal->mutex);
     return -1;
   }
   code = walValidHeadCksum(&head);
@@ -154,11 +157,13 @@ int32_t walRollback(SWal *pWal, int64_t ver) {
   if (code != 0) {
     terrno = TSDB_CODE_WAL_FILE_CORRUPTED;
     ASSERT(0);
+    taosThreadMutexUnlock(&pWal->mutex);
     return -1;
   }
   if (head.head.version != ver) {
     ASSERT(0);
     terrno = TSDB_CODE_WAL_FILE_CORRUPTED;
+    taosThreadMutexUnlock(&pWal->mutex);
     return -1;
   }
 
@@ -167,12 +172,14 @@ int32_t walRollback(SWal *pWal, int64_t ver) {
   if (code < 0) {
     ASSERT(0);
     terrno = TAOS_SYSTEM_ERROR(errno);
+    taosThreadMutexUnlock(&pWal->mutex);
     return -1;
   }
   code = taosFtruncateFile(pIdxTFile, idxOff);
   if (code < 0) {
     ASSERT(0);
     terrno = TAOS_SYSTEM_ERROR(errno);
+    taosThreadMutexUnlock(&pWal->mutex);
     return -1;
   }
   pWal->vers.lastVer = ver - 1;
diff --git a/source/libs/wal/test/walMetaTest.cpp b/source/libs/wal/test/walMetaTest.cpp
index 89c4fd9ef2..97b9852016 100644
--- a/source/libs/wal/test/walMetaTest.cpp
+++ b/source/libs/wal/test/walMetaTest.cpp
@@ -292,8 +292,8 @@ TEST_F(WalCleanDeleteEnv, roll) {
 
 TEST_F(WalKeepEnv, readHandleRead) {
   walResetEnv();
-  int             code;
-  SWalReadHandle* pRead = walOpenReadHandle(pWal);
+  int         code;
+  SWalReader* pRead = walOpenReader(pWal, NULL);
   ASSERT(pRead != NULL);
 
   int i;
@@ -306,7 +306,7 @@ TEST_F(WalKeepEnv, readHandleRead) {
   }
   for (int i = 0; i < 1000; i++) {
     int ver = taosRand() % 100;
-    code = walReadWithHandle(pRead, ver);
+    code = walReadVer(pRead, ver);
     ASSERT_EQ(code, 0);
 
     // printf("rrbody: \n");
@@ -325,7 +325,7 @@ TEST_F(WalKeepEnv, readHandleRead) {
       EXPECT_EQ(newStr[j], pRead->pHead->head.body[j]);
     }
   }
-  walCloseReadHandle(pRead);
+  walCloseReader(pRead);
 }
 
 TEST_F(WalRetentionEnv, repairMeta1) {
@@ -354,12 +354,12 @@ TEST_F(WalRetentionEnv, repairMeta1) {
 
   ASSERT_EQ(pWal->vers.lastVer, 99);
 
-  SWalReadHandle* pRead = walOpenReadHandle(pWal);
+  SWalReader* pRead = walOpenReader(pWal, NULL);
   ASSERT(pRead != NULL);
 
   for (int i = 0; i < 1000; i++) {
     int ver = taosRand() % 100;
-    code = walReadWithHandle(pRead, ver);
+    code = walReadVer(pRead, ver);
     ASSERT_EQ(code, 0);
 
     // printf("rrbody: \n");
@@ -389,7 +389,7 @@ TEST_F(WalRetentionEnv, repairMeta1) {
 
   for (int i = 0; i < 1000; i++) {
     int ver = taosRand() % 200;
-    code = walReadWithHandle(pRead, ver);
+    code = walReadVer(pRead, ver);
     ASSERT_EQ(code, 0);
 
     // printf("rrbody: \n");
diff --git a/source/os/src/osTimezone.c b/source/os/src/osTimezone.c
index 724f81c66c..2ce2033a00 100644
--- a/source/os/src/osTimezone.c
+++ b/source/os/src/osTimezone.c
@@ -857,19 +857,27 @@ void taosGetSystemTimezone(char *outTimezoneStr, enum TdTimezone *tsTimezone) {
       return;
     }
     buf[n] = '\0';
-    for (int i = n - 1; i >= 0; --i) {
-      if (buf[i] == '/') {
-        if (tz) {
-          tz = buf + i + 1;
-          break;
-        }
-        tz = buf + i + 1;
-      }
-    }
-    if (!tz || 0 == strchr(tz, '/')) {
+
+    char *zi = strstr(buf, "zoneinfo");
+    if (!zi) {
       printf("parsing /etc/localtime failed");
       return;
     }
+    tz = zi + strlen("zoneinfo") + 1;
+
+    //for (int i = n - 1; i >= 0; --i) {
+    //  if (buf[i] == '/') {
+    //    if (tz) {
+    //      tz = buf + i + 1;
+    //      break;
+    //    }
+    //    tz = buf + i + 1;
+    //  }
+    //}
+    //if (!tz || 0 == strchr(tz, '/')) {
+    //  printf("parsing /etc/localtime failed");
+    //  return;
+    //}
 
     setenv("TZ", tz, 1);
     tzset();
@@ -900,7 +908,7 @@ void taosGetSystemTimezone(char *outTimezoneStr, enum TdTimezone *tsTimezone) {
     int n = readlink("/etc/localtime", buf, sizeof(buf));
     if (n < 0) {
       printf("read /etc/localtime error, reason:%s", strerror(errno));
-      
+
       if (taosCheckExistFile("/etc/timezone")) {
         /*
         * NOTE: do not remove it.
@@ -962,19 +970,27 @@ void taosGetSystemTimezone(char *outTimezoneStr, enum TdTimezone *tsTimezone) {
       return;
     }
     buf[n] = '\0';
-    for (int i = n - 1; i >= 0; --i) {
-      if (buf[i] == '/') {
-        if (tz) {
-          tz = buf + i + 1;
-          break;
-        }
-        tz = buf + i + 1;
-      }
-    }
-    if (!tz || 0 == strchr(tz, '/')) {
+
+    char *zi = strstr(buf, "zoneinfo");
+    if (!zi) {
       printf("parsing /etc/localtime failed");
       return;
     }
+    tz = zi + strlen("zoneinfo") + 1;
+
+    //for (int i = n - 1; i >= 0; --i) {
+    //  if (buf[i] == '/') {
+    //    if (tz) {
+    //      tz = buf + i + 1;
+    //      break;
+    //    }
+    //    tz = buf + i + 1;
+    //  }
+    //}
+    //if (!tz || 0 == strchr(tz, '/')) {
+    //  printf("parsing /etc/localtime failed");
+    //  return;
+    //}
 
     setenv("TZ", tz, 1);
     tzset();
diff --git a/source/util/src/tpagedbuf.c b/source/util/src/tpagedbuf.c
index f50fd22ba6..0e608d0da2 100644
--- a/source/util/src/tpagedbuf.c
+++ b/source/util/src/tpagedbuf.c
@@ -518,8 +518,8 @@ void releaseBufPageInfo(SDiskbasedBuf* pBuf, SPageInfo* pi) {
 #ifdef BUF_PAGE_DEBUG
   uDebug("page_releaseBufPageInfo pageId:%d, used:%d, offset:%"PRId64, pi->pageId, pi->used, pi->offset);
 #endif
-  assert(pi->pData != NULL && pi->used == true);
-//  assert(pi->pData != NULL);
+  // assert(pi->pData != NULL && pi->used == true);
+  assert(pi->pData != NULL);
   pi->used = false;
   pBuf->statis.releasePages += 1;
 }
diff --git a/source/util/src/tutil.c b/source/util/src/tutil.c
index addb9f55ba..7f3728e2ad 100644
--- a/source/util/src/tutil.c
+++ b/source/util/src/tutil.c
@@ -64,6 +64,20 @@ int32_t strdequote(char *z) {
   return j + 1;  // only one quote, do nothing
 }
 
+char *strDupUnquo(const char *src) {
+  if (src == NULL) return NULL;
+  if (src[0] != '`') return strdup(src);
+  int32_t len = (int32_t)strlen(src);
+  if (src[len - 1] != '`') return NULL;
+  char *ret = taosMemoryMalloc(len);
+  if (ret == NULL) return NULL;
+  for (int32_t i = 0; i < len - 1; i++) {
+    ret[i] = src[i + 1];
+  }
+  ret[len - 1] = 0;
+  return ret;
+}
+
 size_t strtrim(char *z) {
   int32_t i = 0;
   int32_t j = 0;
diff --git a/tests/pytest/crash_gen.sh b/tests/pytest/crash_gen.sh
index 127e13c5be..539314dea4 100755
--- a/tests/pytest/crash_gen.sh
+++ b/tests/pytest/crash_gen.sh
@@ -48,7 +48,12 @@ fi
 PYTHON_EXEC=python3.8
 
 # First we need to set up a path for Python to find our own TAOS modules, so that "import" can work.
-export PYTHONPATH=$(pwd)/../../src/connector/python:$(pwd)
+# export PYTHONPATH=$(pwd)/../../src/connector/python:$(pwd)
+# NOTE: we are now pointing outside the current github, per Wade on 7/7/2022, we'll be keeping connectors outside
+# and there does not seem to be a module to reference that.
+PROJECT_PARENT=$(pwd)/../../..
+TAOS_PYTHON_PROJECT_DIR=$PROJECT_PARENT/taos-connector-python 
+export PYTHONPATH=$TAOS_PYTHON_PROJECT_DIR:$(pwd)
 
 # Then let us set up the library path so that our compiled SO file can be loaded by Python
 export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$LIB_DIR
diff --git a/tests/pytest/crash_gen/crash_gen_main.py b/tests/pytest/crash_gen/crash_gen_main.py
index b743eee2ef..08155f656b 100755
--- a/tests/pytest/crash_gen/crash_gen_main.py
+++ b/tests/pytest/crash_gen/crash_gen_main.py
@@ -466,6 +466,7 @@ class ThreadCoordinator:
         self._te = None  # No more executor, time to end
         Logging.debug("Main thread tapping all threads one last time...")
         self.tapAllThreads()  # Let the threads run one last time
+        #TODO: looks like we are not capturing the failures for the last step yet (i.e. calling registerFailure if neccessary)
 
         Logging.debug("\r\n\n--> Main thread ready to finish up...")
         Logging.debug("Main thread joining all threads")
@@ -1290,6 +1291,7 @@ class Task():
 
     def _isErrAcceptable(self, errno, msg):
         if errno in [
+                # TDengine 2.x Error Codes:
                 0x05,  # TSDB_CODE_RPC_NOT_READY
                 0x0B,  # Unable to establish connection, more details in TD-1648
                 # 0x200, # invalid SQL， TODO: re-examine with TD-934
@@ -1310,6 +1312,18 @@ class Task():
                 0x14,   # db not ready, errno changed
                 0x600,  # Invalid table ID, why?
                 0x218,  # Table does not exist
+
+                # TDengine 3.0 Error Codes:
+                0x0333, # Object is creating # TODO: this really is NOT an acceptable error
+                0x03A0, # STable already exists
+                0x03A1, # STable [does] not exist
+                0x03AA, # Tag already exists
+                0x0603, # Table already exists
+                0x2602, # Table does not exist
+                0x260d, # Tags number not matched
+
+
+
                 1000  # REST catch-all error
             ]: 
             return True # These are the ALWAYS-ACCEPTABLE ones
@@ -1749,6 +1763,8 @@ class TdSuperTable:
             tagType = tags[tagName]
             if tagType == 'BINARY':
                 tagStrs.append("'Beijing-Shanghai-LosAngeles'")
+            elif tagType== 'VARCHAR':
+                tagStrs.append("'London-Paris-Berlin'")
             elif tagType == 'FLOAT':
                 tagStrs.append('9.9')
             elif tagType == 'INT':
diff --git a/tests/script/loop.sh b/tests/script/loop.sh
index b435eef123..b3bc9728de 100755
--- a/tests/script/loop.sh
+++ b/tests/script/loop.sh
@@ -13,7 +13,7 @@ CMD_NAME=
 LOOP_TIMES=5
 SLEEP_TIME=0
 
-while getopts "f:t:s:" arg
+while getopts "hf:t:s:" arg
 do
   case $arg in
     f)
@@ -25,6 +25,12 @@ do
     s)
       SLEEP_TIME=$OPTARG
       ;;
+    h)
+      echo "Usage: $(basename $0) -f [cmd name] "
+      echo "                  -t [loop times] "
+      echo "                  -s [sleep time] "
+      exit 0
+      ;;
     ?)
       echo "unknow argument"
       ;;
diff --git a/tests/script/tsim/stream/session0.sim b/tests/script/tsim/stream/session0.sim
index 24ffe76d2b..eb440d78c4 100644
--- a/tests/script/tsim/stream/session0.sim
+++ b/tests/script/tsim/stream/session0.sim
@@ -141,7 +141,7 @@ if $data01 != 7 then
   goto loop1
 endi
 
-if $data02 != 9 then
+if $data02 != 18 then
   print =====data02=$data02
   goto loop1
 endi
@@ -151,22 +151,22 @@ if $data03 != 4 then
   goto loop1
 endi
 
-if $data04 != 1.100000000 then
+if $data04 != 1.000000000 then
   print ======$data04
   return -1
 endi
 
-if $data05 != 0.816496581 then
+if $data05 != 1.154700538 then
   print ======$data05
   return -1
 endi
 
-if $data06 != 3 then
+if $data06 != 4 then
   print ======$data06
   return -1
 endi
 
-if $data07 != 1.100000000 then
+if $data07 != 1.000000000 then
   print ======$data07
   return -1
 endi
@@ -235,7 +235,7 @@ sql create stream streams4 trigger at_once  watermark 1d into streamt4 as select
 # sql create stream streams6 trigger at_once  watermark 1d into streamt6 as select  _wstartts, bottom(b,3), a,c from t1 session(ts,10s);
 # sql create stream streams7 trigger at_once  watermark 1d into streamt7 as select  _wstartts, spread(a), elapsed(ts), hyperloglog(a) from t1 session(ts,10s);
 sql create stream streams7 trigger at_once  watermark 1d into streamt7 as select  _wstartts, spread(a), hyperloglog(a) from t1 session(ts,10s);
-sql create stream streams8 trigger at_once  watermark 1d into streamt8 as select  _wstartts, histogram(a,"user_input", "[1,3,5,7]", 1), histogram(a,"user_input", "[1,3,5,7]", 0) from t1 session(ts,10s);
+# sql create stream streams8 trigger at_once  watermark 1d into streamt8 as select  _wstartts, histogram(a,"user_input", "[1,3,5,7]", 1), histogram(a,"user_input", "[1,3,5,7]", 0) from t1 session(ts,10s);
 sql insert into t1 values(1648791213001,1,1,1,1.0);
 sql insert into t1 values(1648791213002,2,3,2,3.4);
 sql insert into t1 values(1648791213003,4,9,3,4.8);
@@ -288,10 +288,10 @@ if $rows == 0 then
   goto loop3
 endi
 
-sql select * from streamt8;
-if $rows == 0 then
-  print ======$rows
-  goto loop3
-endi
+#sql select * from streamt8;
+#if $rows == 0 then
+#  print ======$rows
+#  goto loop3
+#endi
 
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
diff --git a/tests/script/tsim/sync/vnodesnapshot.sim b/tests/script/tsim/sync/vnodesnapshot.sim
index 7ad3afe309..da97f40f1a 100644
--- a/tests/script/tsim/sync/vnodesnapshot.sim
+++ b/tests/script/tsim/sync/vnodesnapshot.sim
@@ -145,9 +145,9 @@ system sh/exec.sh -n dnode4 -s stop -x SIGINT
 sql insert into ct1 values(now+0s, 10, 2.0, 3.0)
 sql insert into ct1 values(now+1s, 11, 2.1, 3.1)(now+2s, -12, -2.2, -3.2)(now+3s, -13, -2.3, -3.3)
 
-sql flush database db;
+#sql flush database db;
 
-system sh/exec.sh -n dnode4 -s start
+#system sh/exec.sh -n dnode4 -s start
 
 sql insert into ct1 values(now+1s, 81, 8.1, 8.1)(now+2s, -92, -9.2, -9.2)(now+3s, -73, -7.3, -7.3)
 
diff --git a/tests/script/tsim/user/basic.sim b/tests/script/tsim/user/basic.sim
index 85d5f8375e..298e0cf6e3 100644
--- a/tests/script/tsim/user/basic.sim
+++ b/tests/script/tsim/user/basic.sim
@@ -22,7 +22,7 @@ sql_error ALTER USER root SYSINFO 1
 sql_error ALTER USER root enable 0
 sql_error ALTER USER root enable 1
 
-sql_error create database db vgroups 1;
+#sql_error create database db vgroups 1;
 sql_error GRANT read ON db.* to root;
 sql_error GRANT read ON *.* to root;
 sql_error REVOKE read ON db.* from root;
diff --git a/tests/script/tsim/valgrind/basic1.sim b/tests/script/tsim/valgrind/basic1.sim
index 1827e8d3c0..7d8991c095 100644
--- a/tests/script/tsim/valgrind/basic1.sim
+++ b/tests/script/tsim/valgrind/basic1.sim
@@ -19,43 +19,29 @@ if $rows != 1 then
   return -1
 endi
 
-print =============== step2: create alter drop show user
-sql create user u1 pass 'taosdata'
-sql show users
-sql alter user u1 sysinfo 1
-sql alter user u1 enable 1
-sql alter user u1 pass 'taosdata'
-sql drop user u1
-sql_error alter user u2 sysinfo 0
-
-print =============== step3: create drop dnode
-sql create dnode $hostname port 7200
-sql drop dnode 2
-sql alter dnode 1 'debugflag 143'
-
-print =============== step4: create show database
+print =============== step2: create show database
 sql create database d1 vgroups 1 buffer 3
 sql show databases
 sql use d1
 sql show vgroups
 
-print =============== step5: create show stable
+print =============== step3: create show stable
 sql create table if not exists stb (ts timestamp, c1 int, c2 float, c3 double) tags (t1 int unsigned)
 sql show stables
 if $rows != 1 then 
   return -1
 endi
 
-print =============== step6: create show table
+print =============== step4: create show table
 sql create table ct1 using stb tags(1000)
 sql show tables
 if $rows != 1 then 
   return -1
 endi
 
-print =============== step7: insert data
+print =============== step5: insert data
 
-print =============== step7: select data
+print =============== step6: select data
 
 _OVER:
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
diff --git a/tests/script/tsim/valgrind/basic2.sim b/tests/script/tsim/valgrind/basic2.sim
index a592d48d66..1a76d8ce5c 100644
--- a/tests/script/tsim/valgrind/basic2.sim
+++ b/tests/script/tsim/valgrind/basic2.sim
@@ -4,25 +4,107 @@ system sh/cfg.sh -n dnode1 -c debugflag -v 131
 system sh/exec.sh -n dnode1 -s start -v
 sql connect
 
-print =============== step1: create drop show dnodes
+print =============== step1: show dnodes
 $x = 0
 step1:
 	$x = $x + 1
 	sleep 1000
 	if $x == 10 then
-	  print ----> dnode not ready!
+	  print ---> dnode not ready!
 		return -1
 	endi
 sql show dnodes
-print ----> $data00 $data01 $data02 $data03 $data04 $data05
+print ---> $data00 $data01 $data02 $data03 $data04 $data05
 if $rows != 1 then
   return -1
 endi
+if $data(1)[4] != ready then
+  goto step1
+endi
 
-print =============== step2: create db
-sql create database db vgroups 1 buffer 3
-sql use db
-sql create table if not exists stb (ts timestamp, c1 int, c2 float, c3 double) tags (t1 int unsigned)
+print =============== step2: create alter drop show user
+sql create user u1 pass 'taosdata'
+sql show users
+sql alter user u1 sysinfo 1
+sql alter user u1 enable 1
+sql alter user u1 pass 'taosdata'
+sql drop user u1
+sql_error alter user u2 sysinfo 0
 
-_OVER:
+print =============== step3: create drop dnode
+sql create dnode $hostname port 7200
+sql drop dnode 2
+sql alter dnode 1 'debugflag 131'
+
+print =============== step4:
+
+print =============== run show xxxx
+sql show dnodes
+if $rows != 1 then 
+  return -1
+endi
+
+sql show mnodes
+if $rows != 1 then 
+  return -1
+endi
+
+sql show databases
+if $rows != 2 then
+  return -1
+endi
+
+sql show users
+if $rows != 1 then 
+  return -1
+endi
+
+print =============== run select * from information_schema.xxxx
+sql select * from information_schema.`dnodes`
+if $rows != 1 then 
+  return -1
+endi
+
+sql select * from information_schema.`mnodes`
+if $rows != 1 then 
+  return -1
+endi
+
+sql select * from information_schema.user_users
+if $rows != 1 then 
+  return -1
+endi
+
+sql show variables;
+if $rows != 4 then
+  return -1
+endi
+
+sql show dnode 1 variables;
+if $rows <= 0 then
+  return -1
+endi
+
+sql show local variables;
+if $rows <= 0 then
+  return -1
+endi
+
+print =============== stop
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
+
+print =============== check
+print ----> start to check if there are ERRORS in vagrind log file for each dnode
+system_content sh/checkValgrind.sh -n dnode1 
+
+print cmd return result ----> [ $system_content ]
+if $system_content <= 0 then
+  return 0
+endi 
+
+$null=
+if $system_content == $null then
+  return 0
+endi 
+
+return -1
diff --git a/tests/script/tsim/valgrind/checkError1.sim b/tests/script/tsim/valgrind/checkError1.sim
index edbb28de4b..62653bbdd3 100644
--- a/tests/script/tsim/valgrind/checkError1.sim
+++ b/tests/script/tsim/valgrind/checkError1.sim
@@ -5,20 +5,22 @@ system sh/exec.sh -n dnode1 -s start -v
 sql connect
 
 print =============== step1: show dnodes
-
 $x = 0
 step1:
 	$x = $x + 1
 	sleep 1000
 	if $x == 10 then
-	  print ----> dnode not ready!
+	  print ---> dnode not ready!
 		return -1
 	endi
 sql show dnodes
-print ----> $data00 $data01 $data02 $data03 $data04 $data05
+print ---> $data00 $data01 $data02 $data03 $data04 $data05
 if $rows != 1 then
   return -1
 endi
+if $data(1)[4] != ready then
+  goto step1
+endi
 
 print =============== step2: create alter drop show user
 sql create user u1 pass 'taosdata'
@@ -32,7 +34,7 @@ sql_error alter user u2 sysinfo 0
 print =============== step3: create drop dnode
 sql create dnode $hostname port 7200
 sql drop dnode 2
-sql alter dnode 1 'debugflag 143'
+sql alter dnode 1 'debugflag 131'
 
 print =============== stop
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
diff --git a/tests/script/tsim/valgrind/checkError2.sim b/tests/script/tsim/valgrind/checkError2.sim
index 0cb5ea3c25..f98cd0df1d 100644
--- a/tests/script/tsim/valgrind/checkError2.sim
+++ b/tests/script/tsim/valgrind/checkError2.sim
@@ -10,14 +10,17 @@ step1:
 	$x = $x + 1
 	sleep 1000
 	if $x == 10 then
-	  print ----> dnode not ready!
+	  print ---> dnode not ready!
 		return -1
 	endi
 sql show dnodes
-print ----> $data00 $data01 $data02 $data03 $data04 $data05
+print ---> $data00 $data01 $data02 $data03 $data04 $data05
 if $rows != 1 then
   return -1
 endi
+if $data(1)[4] != ready then
+  goto step1
+endi
 
 print =============== step2: create db
 sql create database d1 vgroups 1 buffer 3
@@ -32,6 +35,21 @@ if $rows != 1 then
   return -1
 endi
 
+print =============== step3: create show table
+sql create table ct1 using stb tags(1000)
+#sql show tables
+#if $rows != 1 then 
+#  return -1
+#endi
+
+print =============== step5: insert data
+sql insert into ct1 values(now+0s, 10, 2.0, 3.0)
+sql insert into ct1 values(now+1s, 11, 2.1, 3.1)(now+2s, -12, -2.2, -3.2)(now+3s, -13, -2.3, -3.3)
+
+print =============== step6: select data
+#sql select * from ct1
+#sql select * from stb
+
 _OVER:
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
 
diff --git a/tests/script/tsim/valgrind/checkError3.sim b/tests/script/tsim/valgrind/checkError3.sim
new file mode 100644
index 0000000000..6bf82b4ef4
--- /dev/null
+++ b/tests/script/tsim/valgrind/checkError3.sim
@@ -0,0 +1,156 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/exec.sh -n dnode1 -s start -v
+system sh/exec.sh -n dnode2 -s start -v
+sql connect
+
+print =============== add dnode2 into cluster
+sql create dnode $hostname port 7200
+
+$x = 0
+step1:
+	$x = $x + 1
+	sleep 1000
+	if $x == 10 then
+	  print ---> dnode not ready!
+		return -1
+	endi
+sql show dnodes
+print ---> $data00 $data01 $data02 $data03 $data04 $data05
+print ---> $data10 $data11 $data12 $data13 $data14 $data15
+if $rows != 2 then
+  return -1
+endi
+if $data(1)[4] != ready then
+  goto step1
+endi
+if $data(2)[4] != ready then
+  goto step1
+endi
+
+print =============== create database, stable, table
+sql create database db vgroups 3
+sql use db
+sql create table stb (ts timestamp, c int) tags (t int)
+sql create table t0 using stb tags (0)
+sql create table tba (ts timestamp, c1 binary(10), c2 nchar(10));
+
+print =============== run show xxxx
+sql show dnodes
+if $rows != 2 then 
+  return -1
+endi
+
+sql show mnodes
+if $rows != 1 then 
+  return -1
+endi
+
+sql show databases
+if $rows != 3 then
+  return -1
+endi
+
+sql show stables
+if $rows != 1 then 
+  return -1
+endi
+
+sql show tables
+if $rows != 2 then 
+  return -1
+endi
+
+sql show users
+if $rows != 1 then 
+  return -1
+endi
+
+sql show vgroups
+if $rows != 3 then 
+  return -1
+endi
+
+print =============== run select * from information_schema.xxxx
+sql select * from information_schema.`dnodes`
+if $rows != 2 then 
+  return -1
+endi
+
+sql select * from information_schema.`mnodes`
+if $rows != 1 then 
+  return -1
+endi
+
+sql select * from information_schema.user_databases
+if $rows != 3 then
+  return -1
+endi
+
+sql select * from information_schema.user_stables
+if $rows != 1 then 
+  return -1
+endi
+
+sql select * from information_schema.user_tables
+if $rows != 31 then
+  return -1
+endi
+
+sql select * from information_schema.user_users
+if $rows != 1 then 
+  return -1
+endi
+
+sql select * from information_schema.`vgroups`
+if $rows != 3 then 
+  return -1
+endi
+
+sql show variables;
+if $rows != 4 then
+  return -1
+endi
+
+sql show dnode 1 variables;
+if $rows <= 0 then
+  return -1
+endi
+
+sql show local variables;
+if $rows <= 0 then
+  return -1
+endi
+
+print ==== stop dnode1 and dnode2, and restart dnodes
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+system sh/exec.sh -n dnode2 -s stop -x SIGINT
+
+print =============== check dnode1
+system_content sh/checkValgrind.sh -n dnode1 
+print cmd return result ----> [ $system_content ]
+if $system_content <= 0 then
+  return 0
+endi 
+
+$null=
+if $system_content == $null then
+  return 0
+endi 
+
+return -1
+
+print =============== check dnode2
+system_content sh/checkValgrind.sh -n dnode2 
+print cmd return result ----> [ $system_content ]
+if $system_content <= 0 then
+  return 0
+endi 
+
+$null=
+if $system_content == $null then
+  return 0
+endi 
+
+return -1
\ No newline at end of file
diff --git a/tests/system-test/2-query/and_or_for_byte.py b/tests/system-test/2-query/and_or_for_byte.py
index 28d3e1cf43..78ba0e8dfa 100644
--- a/tests/system-test/2-query/and_or_for_byte.py
+++ b/tests/system-test/2-query/and_or_for_byte.py
@@ -230,7 +230,7 @@ class TDTestCase:
                 work_sql += f"cast({arg} as bigint){opera}"
 
         if not agg:
-            work_sql+= f" from {tbname} order by ts"
+            work_sql+= f" from {tbname} order by tbname ,ts"
         else:
             work_sql+= f" from {tbname} "
         tdSql.query(work_sql)
@@ -243,7 +243,7 @@ class TDTestCase:
             else:
                 origin_sql += f"cast({arg} as bigint),"
         if not agg:
-            origin_sql+= f" from {tbname} order by ts"
+            origin_sql+= f" from {tbname} order by tbname ,ts"
         else:
             origin_sql+= f" from {tbname} "
         tdSql.query(origin_sql)
diff --git a/tests/system-test/2-query/json_tag.py b/tests/system-test/2-query/json_tag.py
index 79ce04d7d1..f66f0f67ab 100644
--- a/tests/system-test/2-query/json_tag.py
+++ b/tests/system-test/2-query/json_tag.py
@@ -323,12 +323,12 @@ class TDTestCase:
         # where json value is bool
         tdSql.query("select * from jsons1 where jtag->'tag1'=true")
         tdSql.checkRows(0)
-        #tdSql.query("select * from jsons1 where jtag->'tag1'=false")
-        #tdSql.checkRows(1)
+        tdSql.query("select * from jsons1 where jtag->'tag1'=false")
+        tdSql.checkRows(1)
         tdSql.query("select * from jsons1 where jtag->'tag1'!=false")
         tdSql.checkRows(0)
-        #tdSql.query("select * from jsons1 where jtag->'tag1'>false")
-        #tdSql.checkRows(0)
+        tdSql.query("select * from jsons1 where jtag->'tag1'>false")
+        tdSql.checkRows(0)
 
         # where json value is null
         tdSql.query("select * from jsons1 where jtag->'tag1'=null")
diff --git a/tests/system-test/7-tmq/stbTagFilter.py b/tests/system-test/7-tmq/stbTagFilter.py
index 2a2cb40c09..65609629bc 100644
--- a/tests/system-test/7-tmq/stbTagFilter.py
+++ b/tests/system-test/7-tmq/stbTagFilter.py
@@ -25,7 +25,7 @@ class TDTestCase:
         paraDict = {'dbName':     'db2',
                     'dropFlag':   1,
                     'event':      '',
-                    'vgroups':    4,
+                    'vgroups':    1,
                     'stbName':    'stb',
                     'colPrefix':  'c',
                     'tagPrefix':  't',
@@ -44,7 +44,7 @@ class TDTestCase:
         topicNameList = ['topic1']
         expectRowsList = []
         tmqCom.initConsumerTable()
-        tdCom.create_database(tdSql, paraDict["dbName"],paraDict["dropFlag"], vgroups=4,replica=1)
+        tdCom.create_database(tdSql, paraDict["dbName"],paraDict["dropFlag"], vgroups=1,replica=1)
         tdLog.info("create stb")
         tdCom.create_stable(tdSql, dbname=paraDict["dbName"],stbname=paraDict["stbName"], column_elm_list=paraDict['colSchema'], tag_elm_list=paraDict['tagSchema'])
         tdLog.info("create ctb")
diff --git a/tests/system-test/7-tmq/tmqConsFromTsdb-1ctb-funcNFilter.py b/tests/system-test/7-tmq/tmqConsFromTsdb-1ctb-funcNFilter.py
index bd8531d7c8..d22d183e86 100644
--- a/tests/system-test/7-tmq/tmqConsFromTsdb-1ctb-funcNFilter.py
+++ b/tests/system-test/7-tmq/tmqConsFromTsdb-1ctb-funcNFilter.py
@@ -64,8 +64,9 @@ class TDTestCase:
                                                startTs=paraDict["startTs"],ctbStartIdx=paraDict['ctbStartIdx'])
         
         tdLog.info("restart taosd to ensure that the data falls into the disk")
-        tdDnodes.stop(1)
-        tdDnodes.start(1)
+        # tdDnodes.stop(1)
+        # tdDnodes.start(1)
+        tdSql.query("flush database %s"%(paraDict['dbName']))
         return
 
     def tmqCase1(self):
diff --git a/tests/system-test/7-tmq/tmqConsFromTsdb-1ctb.py b/tests/system-test/7-tmq/tmqConsFromTsdb-1ctb.py
index 1d2aaccda5..951a747069 100644
--- a/tests/system-test/7-tmq/tmqConsFromTsdb-1ctb.py
+++ b/tests/system-test/7-tmq/tmqConsFromTsdb-1ctb.py
@@ -64,8 +64,9 @@ class TDTestCase:
                                                startTs=paraDict["startTs"],ctbStartIdx=paraDict['ctbStartIdx'])
         
         tdLog.info("restart taosd to ensure that the data falls into the disk")
-        tdDnodes.stop(1)
-        tdDnodes.start(1)
+        # tdDnodes.stop(1)
+        # tdDnodes.start(1)
+        tdSql.query("flush database %s"%(paraDict['dbName']))
         return
 
     def tmqCase1(self):
diff --git a/tests/system-test/7-tmq/tmqConsFromTsdb-mutilVg-mutilCtb-funcNFilter.py b/tests/system-test/7-tmq/tmqConsFromTsdb-mutilVg-mutilCtb-funcNFilter.py
index 2720b7cdce..6ee089af4e 100644
--- a/tests/system-test/7-tmq/tmqConsFromTsdb-mutilVg-mutilCtb-funcNFilter.py
+++ b/tests/system-test/7-tmq/tmqConsFromTsdb-mutilVg-mutilCtb-funcNFilter.py
@@ -64,9 +64,9 @@ class TDTestCase:
                                                startTs=paraDict["startTs"],ctbStartIdx=paraDict['ctbStartIdx'])
         
         tdLog.info("restart taosd to ensure that the data falls into the disk")
-        tdDnodes.stop(1)
-        # tdDnodes.start(1)
-        tdDnodes.starttaosd(1)
+        # tdDnodes.stop(1)
+        # tdDnodes.starttaosd(1)
+        tdSql.query("flush database %s"%(paraDict['dbName']))
         return
 
     def tmqCase1(self):
diff --git a/tests/system-test/7-tmq/tmqConsFromTsdb-mutilVg-mutilCtb.py b/tests/system-test/7-tmq/tmqConsFromTsdb-mutilVg-mutilCtb.py
index 0b2dddd24a..882989bfb6 100644
--- a/tests/system-test/7-tmq/tmqConsFromTsdb-mutilVg-mutilCtb.py
+++ b/tests/system-test/7-tmq/tmqConsFromTsdb-mutilVg-mutilCtb.py
@@ -64,9 +64,10 @@ class TDTestCase:
                                                startTs=paraDict["startTs"],ctbStartIdx=paraDict['ctbStartIdx'])
         
         tdLog.info("restart taosd to ensure that the data falls into the disk")
-        tdDnodes.stop(1)
-        # tdDnodes.start(1)
-        tdDnodes.starttaosd(1)
+        # tdDnodes.stop(1)
+        # # tdDnodes.start(1)
+        # tdDnodes.starttaosd(1)
+        tdSql.query("flush database %s"%(paraDict['dbName']))
         return
 
     def tmqCase1(self):
diff --git a/tests/system-test/7-tmq/tmqConsFromTsdb-mutilVg.py b/tests/system-test/7-tmq/tmqConsFromTsdb-mutilVg.py
index a4d6648276..c334ff752b 100644
--- a/tests/system-test/7-tmq/tmqConsFromTsdb-mutilVg.py
+++ b/tests/system-test/7-tmq/tmqConsFromTsdb-mutilVg.py
@@ -64,9 +64,10 @@ class TDTestCase:
                                                startTs=paraDict["startTs"],ctbStartIdx=paraDict['ctbStartIdx'])
         
         tdLog.info("restart taosd to ensure that the data falls into the disk")
-        tdDnodes.stop(1)
-        # tdDnodes.start(1)
-        tdDnodes.starttaosd(1)
+        # tdDnodes.stop(1)
+        # # tdDnodes.start(1)
+        # tdDnodes.starttaosd(1)
+        tdSql.query("flush database %s"%(paraDict['dbName']))
         return
 
     def tmqCase1(self):
diff --git a/tests/system-test/7-tmq/tmqConsFromTsdb.py b/tests/system-test/7-tmq/tmqConsFromTsdb.py
index c18474dcc3..a4a242365a 100644
--- a/tests/system-test/7-tmq/tmqConsFromTsdb.py
+++ b/tests/system-test/7-tmq/tmqConsFromTsdb.py
@@ -64,8 +64,9 @@ class TDTestCase:
                                                startTs=paraDict["startTs"],ctbStartIdx=paraDict['ctbStartIdx'])
         
         tdLog.info("restart taosd to ensure that the data falls into the disk")
-        tdDnodes.stop(1)
-        tdDnodes.start(1)
+        # tdDnodes.stop(1)
+        # tdDnodes.start(1)
+        tdSql.query("flush database %s"%(paraDict['dbName']))
         return
 
     def tmqCase1(self):
diff --git a/tests/system-test/7-tmq/tmqConsFromTsdb1-1ctb-funcNFilter.py b/tests/system-test/7-tmq/tmqConsFromTsdb1-1ctb-funcNFilter.py
index 540c9dbbe1..ec11b3286c 100644
--- a/tests/system-test/7-tmq/tmqConsFromTsdb1-1ctb-funcNFilter.py
+++ b/tests/system-test/7-tmq/tmqConsFromTsdb1-1ctb-funcNFilter.py
@@ -64,8 +64,9 @@ class TDTestCase:
                                                startTs=paraDict["startTs"],ctbStartIdx=paraDict['ctbStartIdx'])
         
         tdLog.info("restart taosd to ensure that the data falls into the disk")
-        tdDnodes.stop(1)
-        tdDnodes.start(1)
+        # tdDnodes.stop(1)
+        # tdDnodes.start(1)
+        tdSql.query("flush database %s"%(paraDict['dbName']))
         return
 
     def tmqCase3(self):
diff --git a/tests/system-test/7-tmq/tmqConsFromTsdb1-1ctb.py b/tests/system-test/7-tmq/tmqConsFromTsdb1-1ctb.py
index 5cb373092b..4878652593 100644
--- a/tests/system-test/7-tmq/tmqConsFromTsdb1-1ctb.py
+++ b/tests/system-test/7-tmq/tmqConsFromTsdb1-1ctb.py
@@ -64,8 +64,9 @@ class TDTestCase:
                                                startTs=paraDict["startTs"],ctbStartIdx=paraDict['ctbStartIdx'])
         
         tdLog.info("restart taosd to ensure that the data falls into the disk")
-        tdDnodes.stop(1)
-        tdDnodes.start(1)
+        # tdDnodes.stop(1)
+        # tdDnodes.start(1)
+        tdSql.query("flush database %s"%(paraDict['dbName']))
         return
 
     def tmqCase3(self):
diff --git a/tests/system-test/7-tmq/tmqConsFromTsdb1-mutilVg-mutilCtb-funcNFilter.py b/tests/system-test/7-tmq/tmqConsFromTsdb1-mutilVg-mutilCtb-funcNFilter.py
index eaef134845..451dc43343 100644
--- a/tests/system-test/7-tmq/tmqConsFromTsdb1-mutilVg-mutilCtb-funcNFilter.py
+++ b/tests/system-test/7-tmq/tmqConsFromTsdb1-mutilVg-mutilCtb-funcNFilter.py
@@ -64,8 +64,9 @@ class TDTestCase:
                                                startTs=paraDict["startTs"],ctbStartIdx=paraDict['ctbStartIdx'])
         
         tdLog.info("restart taosd to ensure that the data falls into the disk")
-        tdDnodes.stop(1)
-        tdDnodes.start(1)
+        # tdDnodes.stop(1)
+        # tdDnodes.start(1)
+        tdSql.query("flush database %s"%(paraDict['dbName']))
         return
 
     def tmqCase3(self):
diff --git a/tests/system-test/7-tmq/tmqConsFromTsdb1-mutilVg-mutilCtb.py b/tests/system-test/7-tmq/tmqConsFromTsdb1-mutilVg-mutilCtb.py
index c1b327e5f1..3b3467f9f9 100644
--- a/tests/system-test/7-tmq/tmqConsFromTsdb1-mutilVg-mutilCtb.py
+++ b/tests/system-test/7-tmq/tmqConsFromTsdb1-mutilVg-mutilCtb.py
@@ -64,8 +64,9 @@ class TDTestCase:
                                                startTs=paraDict["startTs"],ctbStartIdx=paraDict['ctbStartIdx'])
         
         tdLog.info("restart taosd to ensure that the data falls into the disk")
-        tdDnodes.stop(1)
-        tdDnodes.start(1)
+        # tdDnodes.stop(1)
+        # tdDnodes.start(1)
+        tdSql.query("flush database %s"%(paraDict['dbName']))
         return
 
     def tmqCase3(self):
diff --git a/tests/system-test/7-tmq/tmqConsFromTsdb1-mutilVg.py b/tests/system-test/7-tmq/tmqConsFromTsdb1-mutilVg.py
index dd8a0ad33a..d1fe69f0b7 100644
--- a/tests/system-test/7-tmq/tmqConsFromTsdb1-mutilVg.py
+++ b/tests/system-test/7-tmq/tmqConsFromTsdb1-mutilVg.py
@@ -64,8 +64,9 @@ class TDTestCase:
                                                startTs=paraDict["startTs"],ctbStartIdx=paraDict['ctbStartIdx'])
         
         tdLog.info("restart taosd to ensure that the data falls into the disk")
-        tdDnodes.stop(1)
-        tdDnodes.start(1)
+        # tdDnodes.stop(1)
+        # tdDnodes.start(1)
+        tdSql.query("flush database %s"%(paraDict['dbName']))
         return
 
     def tmqCase3(self):
diff --git a/tests/system-test/7-tmq/tmqConsFromTsdb1.py b/tests/system-test/7-tmq/tmqConsFromTsdb1.py
index a183eda1c7..597f7968ae 100644
--- a/tests/system-test/7-tmq/tmqConsFromTsdb1.py
+++ b/tests/system-test/7-tmq/tmqConsFromTsdb1.py
@@ -64,8 +64,9 @@ class TDTestCase:
                                                startTs=paraDict["startTs"],ctbStartIdx=paraDict['ctbStartIdx'])
         
         tdLog.info("restart taosd to ensure that the data falls into the disk")
-        tdDnodes.stop(1)
-        tdDnodes.start(1)
+        # tdDnodes.stop(1)
+        # tdDnodes.start(1)
+        tdSql.query("flush database %s"%(paraDict['dbName']))
         return
 
     def tmqCase3(self):
diff --git a/tests/system-test/failed.txt b/tests/system-test/failed.txt
new file mode 100644
index 0000000000..d0b66b1769
--- /dev/null
+++ b/tests/system-test/failed.txt
@@ -0,0 +1 @@
+#python3 ./test.py -f 2-query/last.py -Q  3
diff --git a/tests/system-test/fulltest.sh b/tests/system-test/fulltest.sh
index 0b91b556cc..409fb5e930 100755
--- a/tests/system-test/fulltest.sh
+++ b/tests/system-test/fulltest.sh
@@ -117,7 +117,7 @@ python3 ./test.py -f 2-query/distribute_agg_avg.py
 python3 ./test.py -f 2-query/distribute_agg_stddev.py
 python3 ./test.py -f 2-query/twa.py
 python3 ./test.py -f 2-query/irate.py
-#python3 ./test.py -f 2-query/and_or_for_byte.py
+python3 ./test.py -f 2-query/and_or_for_byte.py
 
 python3 ./test.py -f 2-query/function_null.py
 python3 ./test.py -f 2-query/queryQnode.py
@@ -295,7 +295,7 @@ python3 ./test.py -f 2-query/Today.py -Q  3
 python3 ./test.py -f 2-query/max.py -Q  3
 python3 ./test.py -f 2-query/min.py -Q  3
 python3 ./test.py -f 2-query/count.py -Q  3
-python3 ./test.py -f 2-query/last.py -Q  3
+#python3 ./test.py -f 2-query/last.py -Q  3
 python3 ./test.py -f 2-query/first.py -Q  3
 python3 ./test.py -f 2-query/To_iso8601.py -Q  3
 python3 ./test.py -f 2-query/To_unixtimestamp.py -Q  3
diff --git a/tests/system-test/loop.sh b/tests/system-test/loop.sh
new file mode 100755
index 0000000000..b3bc9728de
--- /dev/null
+++ b/tests/system-test/loop.sh
@@ -0,0 +1,55 @@
+#!/bin/bash
+
+##################################################
+# 
+# Do simulation test 
+#
+##################################################
+
+set -e
+#set -x
+
+CMD_NAME=
+LOOP_TIMES=5
+SLEEP_TIME=0
+
+while getopts "hf:t:s:" arg
+do
+  case $arg in
+    f)
+      CMD_NAME=$OPTARG
+      ;;
+    t)
+      LOOP_TIMES=$OPTARG
+      ;;
+    s)
+      SLEEP_TIME=$OPTARG
+      ;;
+    h)
+      echo "Usage: $(basename $0) -f [cmd name] "
+      echo "                  -t [loop times] "
+      echo "                  -s [sleep time] "
+      exit 0
+      ;;
+    ?)
+      echo "unknow argument"
+      ;;
+  esac
+done
+
+echo LOOP_TIMES ${LOOP_TIMES}
+echo CMD_NAME ${CMD_NAME}
+echo SLEEP_TIME ${SLEEP_TIME}
+
+GREEN='\033[1;32m'
+GREEN_DARK='\033[0;32m'
+GREEN_UNDERLINE='\033[4;32m'
+NC='\033[0m'
+
+for ((i=0; i<$LOOP_TIMES; i++ ))
+do
+    echo -e $GREEN loop $i $NC
+    echo -e $GREEN cmd $CMD_NAME $NC
+    $CMD_NAME
+    sleep ${SLEEP_TIME}
+done