diff --git a/include/libs/wal/wal.h b/include/libs/wal/wal.h
index eb5db9d639..c11651970c 100644
--- a/include/libs/wal/wal.h
+++ b/include/libs/wal/wal.h
@@ -61,45 +61,23 @@ extern "C" {
     }                                                             \
   }
 
-#define WAL_HEAD_VER     0
+#define WAL_PROTO_VER    0
 #define WAL_NOSUFFIX_LEN 20
 #define WAL_SUFFIX_AT    (WAL_NOSUFFIX_LEN + 1)
 #define WAL_LOG_SUFFIX   "log"
 #define WAL_INDEX_SUFFIX "idx"
 #define WAL_REFRESH_MS   1000
-#define WAL_MAX_SIZE     (TSDB_MAX_WAL_SIZE + sizeof(SWalHead))
+#define WAL_MAX_SIZE     (TSDB_MAX_WAL_SIZE + sizeof(SWalCkHead))
 #define WAL_PATH_LEN     (TSDB_FILENAME_LEN + 12)
 #define WAL_FILE_LEN     (WAL_PATH_LEN + 32)
 #define WAL_MAGIC        0xFAFBFCFDULL
 
-#pragma pack(push, 1)
 typedef enum {
   TAOS_WAL_NOLOG = 0,
   TAOS_WAL_WRITE = 1,
   TAOS_WAL_FSYNC = 2,
 } EWalType;
 
-// used by sync module
-typedef struct {
-  int8_t   isWeek;
-  uint64_t seqNum;
-  uint64_t term;
-} SSyncLogMeta;
-
-typedef struct SWalReadHead {
-  int8_t  headVer;
-  int8_t  reserved;
-  int16_t msgType;
-  int32_t bodyLen;
-  int64_t ingestTs;  // not implemented
-  int64_t version;
-
-  // sync meta
-  SSyncLogMeta syncMeta;
-
-  char body[];
-} SWalReadHead;
-
 typedef struct {
   int32_t  vgId;
   int32_t  fsyncPeriod;      // millisecond
@@ -110,13 +88,6 @@ typedef struct {
   EWalType level;  // wal level
 } SWalCfg;
 
-typedef struct {
-  uint64_t     magic;
-  uint32_t     cksumHead;
-  uint32_t     cksumBody;
-  SWalReadHead head;
-} SWalHead;
-
 typedef struct SWalVer {
   int64_t firstVer;
   int64_t verInSnapshotting;
@@ -125,6 +96,35 @@ typedef struct SWalVer {
   int64_t lastVer;
 } SWalVer;
 
+#pragma pack(push, 1)
+// used by sync module
+typedef struct {
+  int8_t   isWeek;
+  uint64_t seqNum;
+  uint64_t term;
+} SSyncLogMeta;
+
+typedef struct {
+  int8_t  protoVer;
+  int64_t version;
+  int16_t msgType;
+  int32_t bodyLen;
+  int64_t ingestTs;  // not implemented
+
+  // sync meta
+  SSyncLogMeta syncMeta;
+
+  char body[];
+} SWalCont;
+
+typedef struct {
+  uint64_t magic;
+  uint32_t cksumHead;
+  uint32_t cksumBody;
+  SWalCont head;
+} SWalCkHead;
+#pragma pack(pop)
+
 typedef struct SWal {
   // cfg
   SWalCfg cfg;
@@ -134,7 +134,7 @@ typedef struct SWal {
   TdFilePtr pWriteLogTFile;
   TdFilePtr pWriteIdxTFile;
   int32_t   writeCur;
-  SArray   *fileInfoSet;
+  SArray   *fileInfoSet;  // SArray<SWalFileInfo>
   // status
   int64_t totSize;
   int64_t lastRollSeq;
@@ -146,7 +146,7 @@ typedef struct SWal {
   // path
   char path[WAL_PATH_LEN];
   // reusable write head
-  SWalHead writeHead;
+  SWalCkHead writeHead;
 } SWal;  // WAL HANDLE
 
 typedef struct SWalReadHandle {
@@ -158,11 +158,8 @@ typedef struct SWalReadHandle {
   int64_t       capacity;
   int64_t       status;  // if cursor valid
   TdThreadMutex mutex;
-  SWalHead     *pHead;
+  SWalCkHead   *pHead;
 } SWalReadHandle;
-#pragma pack(pop)
-
-// typedef int32_t (*FWalWrite)(void *ahandle, void *pHead);
 
 // module initialization
 int32_t walInit();
@@ -174,9 +171,9 @@ int32_t walAlter(SWal *, SWalCfg *pCfg);
 void    walClose(SWal *);
 
 // write
-int64_t walWriteWithSyncInfo(SWal *, int64_t index, tmsg_t msgType, SSyncLogMeta syncMeta, const void *body,
+int32_t walWriteWithSyncInfo(SWal *, int64_t index, tmsg_t msgType, SSyncLogMeta syncMeta, const void *body,
                              int32_t bodyLen);
-int64_t walWrite(SWal *, int64_t index, tmsg_t msgType, const void *body, int32_t bodyLen);
+int32_t walWrite(SWal *, int64_t index, tmsg_t msgType, const void *body, int32_t bodyLen);
 void    walFsync(SWal *, bool force);
 
 // apis for lifecycle management
@@ -196,9 +193,9 @@ int32_t         walReadWithHandle(SWalReadHandle *pRead, int64_t ver);
 
 // only for tq usage
 void    walSetReaderCapacity(SWalReadHandle *pRead, int32_t capacity);
-int32_t walFetchHead(SWalReadHandle *pRead, int64_t ver, SWalHead *pHead);
-int32_t walFetchBody(SWalReadHandle *pRead, SWalHead **ppHead);
-int32_t walSkipFetchBody(SWalReadHandle *pRead, const SWalHead *pHead);
+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);
 
 typedef struct {
   int64_t refId;
diff --git a/include/os/osFile.h b/include/os/osFile.h
index 8751e175a5..2f6a6ba480 100644
--- a/include/os/osFile.h
+++ b/include/os/osFile.h
@@ -25,17 +25,17 @@ extern "C" {
 // If the error is in a third-party library, place this header file under the third-party library header file.
 // When you want to use this feature, you should find or add the same function in the following sectio
 #ifndef ALLOW_FORBID_FUNC
-    #define open OPEN_FUNC_TAOS_FORBID
-    #define fopen FOPEN_FUNC_TAOS_FORBID
-    #define access ACCESS_FUNC_TAOS_FORBID
-    #define stat STAT_FUNC_TAOS_FORBID
-    #define lstat LSTAT_FUNC_TAOS_FORBID
-    #define fstat FSTAT_FUNC_TAOS_FORBID
-    #define close CLOSE_FUNC_TAOS_FORBID
-    #define fclose FCLOSE_FUNC_TAOS_FORBID
-    #define fsync FSYNC_FUNC_TAOS_FORBID
-    #define getline GETLINE_FUNC_TAOS_FORBID
-    // #define fflush FFLUSH_FUNC_TAOS_FORBID
+#define open    OPEN_FUNC_TAOS_FORBID
+#define fopen   FOPEN_FUNC_TAOS_FORBID
+#define access  ACCESS_FUNC_TAOS_FORBID
+#define stat    STAT_FUNC_TAOS_FORBID
+#define lstat   LSTAT_FUNC_TAOS_FORBID
+#define fstat   FSTAT_FUNC_TAOS_FORBID
+#define close   CLOSE_FUNC_TAOS_FORBID
+#define fclose  FCLOSE_FUNC_TAOS_FORBID
+#define fsync   FSYNC_FUNC_TAOS_FORBID
+#define getline GETLINE_FUNC_TAOS_FORBID
+// #define fflush FFLUSH_FUNC_TAOS_FORBID
 #endif
 
 #ifndef PATH_MAX
@@ -43,54 +43,54 @@ extern "C" {
 #endif
 
 typedef struct TdFile *TdFilePtr;
- 
-#define TD_FILE_CREATE    0x0001
-#define TD_FILE_WRITE     0x0002
-#define TD_FILE_READ      0x0004
-#define TD_FILE_TRUNC     0x0008
-#define TD_FILE_APPEND    0x0010
-#define TD_FILE_TEXT      0x0020
-#define TD_FILE_AUTO_DEL  0x0040
-#define TD_FILE_EXCL      0x0080
-#define TD_FILE_STREAM    0x0100   // Only support taosFprintfFile, taosGetLineFile, taosEOFFile
-TdFilePtr taosOpenFile(const char *path,int32_t tdFileOptions);
+
+#define TD_FILE_CREATE   0x0001
+#define TD_FILE_WRITE    0x0002
+#define TD_FILE_READ     0x0004
+#define TD_FILE_TRUNC    0x0008
+#define TD_FILE_APPEND   0x0010
+#define TD_FILE_TEXT     0x0020
+#define TD_FILE_AUTO_DEL 0x0040
+#define TD_FILE_EXCL     0x0080
+#define TD_FILE_STREAM   0x0100  // Only support taosFprintfFile, taosGetLineFile, taosEOFFile
+TdFilePtr taosOpenFile(const char *path, int32_t tdFileOptions);
 
 #define TD_FILE_ACCESS_EXIST_OK 0x1
 #define TD_FILE_ACCESS_READ_OK  0x2
 #define TD_FILE_ACCESS_WRITE_OK 0x4
-bool    taosCheckAccessFile(const char *pathname, int mode);
- 
+bool taosCheckAccessFile(const char *pathname, int mode);
+
 int32_t taosLockFile(TdFilePtr pFile);
 int32_t taosUnLockFile(TdFilePtr pFile);
- 
+
 int32_t taosUmaskFile(int32_t maskVal);
- 
+
 int32_t taosStatFile(const char *path, int64_t *size, int32_t *mtime);
 int32_t taosDevInoFile(TdFilePtr pFile, int64_t *stDev, int64_t *stIno);
 int32_t taosFStatFile(TdFilePtr pFile, int64_t *size, int32_t *mtime);
 bool    taosCheckExistFile(const char *pathname);
- 
+
 int64_t taosLSeekFile(TdFilePtr pFile, int64_t offset, int32_t whence);
 int32_t taosFtruncateFile(TdFilePtr pFile, int64_t length);
 int32_t taosFsyncFile(TdFilePtr pFile);
- 
+
 int64_t taosReadFile(TdFilePtr pFile, void *buf, int64_t count);
 int64_t taosPReadFile(TdFilePtr pFile, void *buf, int64_t count, int64_t offset);
 int64_t taosWriteFile(TdFilePtr pFile, const void *buf, int64_t count);
 void    taosFprintfFile(TdFilePtr pFile, const char *format, ...);
 
-int64_t taosGetLineFile(TdFilePtr pFile, char ** __restrict ptrBuf);
+int64_t taosGetLineFile(TdFilePtr pFile, char **__restrict ptrBuf);
 int64_t taosGetsFile(TdFilePtr pFile, int32_t maxSize, char *__restrict buf);
 
 int32_t taosEOFFile(TdFilePtr pFile);
- 
-int64_t taosCloseFile(TdFilePtr *ppFile);
- 
+
+int32_t taosCloseFile(TdFilePtr *ppFile);
+
 int32_t taosRenameFile(const char *oldName, const char *newName);
 int64_t taosCopyFile(const char *from, const char *to);
 int32_t taosRemoveFile(const char *path);
- 
-void    taosGetTmpfilePath(const char *inputTmpDir, const char *fileNamePrefix, char *dstPath);
+
+void taosGetTmpfilePath(const char *inputTmpDir, const char *fileNamePrefix, char *dstPath);
 
 int64_t taosFSendFile(TdFilePtr pFileOut, TdFilePtr pFileIn, int64_t *offset, int64_t size);
 
diff --git a/include/util/tarray.h b/include/util/tarray.h
index 482f13de39..e8037699ae 100644
--- a/include/util/tarray.h
+++ b/include/util/tarray.h
@@ -139,7 +139,7 @@ void* taosArrayGetLast(const SArray* pArray);
  * @param pArray
  * @return
  */
-size_t taosArrayGetSize(const SArray* pArray);
+int32_t taosArrayGetSize(const SArray* pArray);
 
 /**
  * set the size of array
diff --git a/include/util/tutil.h b/include/util/tutil.h
index b29e1f7cfa..6a1a40f14c 100644
--- a/include/util/tutil.h
+++ b/include/util/tutil.h
@@ -44,6 +44,8 @@ uint32_t ip2uint(const char *const ip_addr);
 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);
+
 static FORCE_INLINE void taosEncryptPass(uint8_t *inBuf, size_t inLen, char *target) {
   T_MD5_CTX context;
   tMD5Init(&context);
@@ -59,10 +61,10 @@ static FORCE_INLINE void taosEncryptPass_c(uint8_t *inBuf, size_t len, char *tar
   tMD5Final(&context);
   char buf[TSDB_PASSWORD_LEN + 1];
 
-  sprintf(buf, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x", context.digest[0],
-          context.digest[1], context.digest[2], context.digest[3], context.digest[4], context.digest[5],
-          context.digest[6], context.digest[7], context.digest[8], context.digest[9], context.digest[10],
-          context.digest[11], context.digest[12], context.digest[13], context.digest[14], context.digest[15]);
+  sprintf(buf, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x", context.digest[0], context.digest[1],
+          context.digest[2], context.digest[3], context.digest[4], context.digest[5], context.digest[6],
+          context.digest[7], context.digest[8], context.digest[9], context.digest[10], context.digest[11],
+          context.digest[12], context.digest[13], context.digest[14], context.digest[15]);
   memcpy(target, buf, TSDB_PASSWORD_LEN);
 }
 
diff --git a/source/dnode/vnode/src/inc/tq.h b/source/dnode/vnode/src/inc/tq.h
index cab4805b20..d10935c022 100644
--- a/source/dnode/vnode/src/inc/tq.h
+++ b/source/dnode/vnode/src/inc/tq.h
@@ -157,7 +157,7 @@ typedef struct {
 static STqMgmt tqMgmt = {0};
 
 // tqRead
-int64_t tqFetchLog(STQ* pTq, STqHandle* pHandle, int64_t* fetchOffset, SWalHead** pHeadWithCkSum);
+int64_t tqFetchLog(STQ* pTq, STqHandle* pHandle, int64_t* fetchOffset, SWalCkHead** pHeadWithCkSum);
 
 // tqExec
 int32_t tqLogScanExec(STQ* pTq, STqExecHandle* pExec, SSubmitReq* pReq, SMqDataRsp* pRsp, int32_t workerId);
@@ -178,6 +178,7 @@ STqOffsetStore* tqOffsetOpen();
 void            tqOffsetClose(STqOffsetStore*);
 STqOffset*      tqOffsetRead(STqOffsetStore* pStore, const char* subscribeKey);
 int32_t         tqOffsetWrite(STqOffsetStore* pStore, const STqOffset* pOffset);
+int32_t         tqOffsetDelete(STqOffsetStore* pStore, const char* subscribeKey);
 int32_t         tqOffsetSnapshot(STqOffsetStore* pStore);
 
 // tqSink
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index 8ef66d3ef6..35486a5267 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -271,8 +271,8 @@ int32_t tqProcessPollReq(STQ* pTq, SRpcMsg* pMsg, int32_t workerId) {
     STqOffset* pOffset = tqOffsetRead(pTq->pOffsetStore, pReq->subKey);
     if (pOffset != NULL) {
       fetchOffsetNew = pOffset->val;
-      char formatBuf[50];
-      tFormatOffset(formatBuf, 50, &fetchOffsetNew);
+      char formatBuf[80];
+      tFormatOffset(formatBuf, 80, &fetchOffsetNew);
       tqDebug("tmq poll: consumer %ld, offset reset to %s", consumerId, formatBuf);
     } else {
       if (reqOffset.type == TMQ_OFFSET__RESET_EARLIEAST) {
@@ -302,9 +302,9 @@ int32_t tqProcessPollReq(STQ* pTq, SRpcMsg* pMsg, int32_t workerId) {
   tqInitDataRsp(&dataRsp, pReq, pHandle->execHandle.subType);
 
   if (fetchOffsetNew.type == TMQ_OFFSET__LOG) {
-    int64_t   fetchVer = fetchOffsetNew.version + 1;
-    SWalHead* pHeadWithCkSum = taosMemoryMalloc(sizeof(SWalHead) + 2048);
-    if (pHeadWithCkSum == NULL) {
+    int64_t     fetchVer = fetchOffsetNew.version + 1;
+    SWalCkHead* pCkHead = taosMemoryMalloc(sizeof(SWalCkHead) + 2048);
+    if (pCkHead == NULL) {
       return -1;
     }
 
@@ -318,7 +318,7 @@ int32_t tqProcessPollReq(STQ* pTq, SRpcMsg* pMsg, int32_t workerId) {
         break;
       }
 
-      if (tqFetchLog(pTq, pHandle, &fetchVer, &pHeadWithCkSum) < 0) {
+      if (tqFetchLog(pTq, pHandle, &fetchVer, &pCkHead) < 0) {
         // TODO add push mgr
 
         tqOffsetResetToLog(&dataRsp.rspOffset, fetchVer);
@@ -329,7 +329,7 @@ int32_t tqProcessPollReq(STQ* pTq, SRpcMsg* pMsg, int32_t workerId) {
         goto OVER;
       }
 
-      SWalReadHead* pHead = &pHeadWithCkSum->head;
+      SWalCont* pHead = &pCkHead->head;
 
       tqDebug("tmq poll: consumer %ld (epoch %d) iter log, vg %d offset %ld msgType %d", consumerId, pReq->epoch,
               TD_VID(pTq->pVnode), fetchVer, pHead->msgType);
@@ -373,9 +373,10 @@ int32_t tqProcessPollReq(STQ* pTq, SRpcMsg* pMsg, int32_t workerId) {
       }
     }
 
-    taosMemoryFree(pHeadWithCkSum);
+    taosMemoryFree(pCkHead);
   } else if (fetchOffsetNew.type == TMQ_OFFSET__SNAPSHOT_DATA) {
-    tqInfo("retrieve using snapshot req offset: uid %ld ts %ld", dataRsp.reqOffset.uid, dataRsp.reqOffset.ts);
+    tqInfo("retrieve using snapshot req offset: uid %ld ts %ld, actual offset: uid %ld ts %ld", dataRsp.reqOffset.uid,
+           dataRsp.reqOffset.ts, fetchOffsetNew.uid, fetchOffsetNew.ts);
     if (tqScanSnapshot(pTq, &pHandle->execHandle, &dataRsp, fetchOffsetNew, workerId) < 0) {
       ASSERT(0);
     }
@@ -522,7 +523,7 @@ int32_t tqProcessPollReq(STQ* pTq, SRpcMsg* pMsg, int32_t workerId) {
       break;
     }
 
-    SWalReadHead* pHead = &pHeadWithCkSum->head;
+    SWalCont* pHead = &pHeadWithCkSum->head;
 
     tqDebug("tmq poll: consumer %ld (epoch %d) iter log, vg %d offset %ld msgType %d", consumerId, pReq->epoch,
             TD_VID(pTq->pVnode), fetchOffset, pHead->msgType);
@@ -597,6 +598,8 @@ int32_t tqProcessVgDeleteReq(STQ* pTq, char* msg, int32_t msgLen) {
   int32_t code = taosHashRemove(pTq->handles, pReq->subKey, strlen(pReq->subKey));
   ASSERT(code == 0);
 
+  tqOffsetDelete(pTq->pOffsetStore, pReq->subKey);
+
   if (tqMetaDeleteHandle(pTq, pReq->subKey) < 0) {
     ASSERT(0);
   }
diff --git a/source/dnode/vnode/src/tq/tqOffset.c b/source/dnode/vnode/src/tq/tqOffset.c
index 16b8872098..ef61897f91 100644
--- a/source/dnode/vnode/src/tq/tqOffset.c
+++ b/source/dnode/vnode/src/tq/tqOffset.c
@@ -97,6 +97,10 @@ int32_t tqOffsetWrite(STqOffsetStore* pStore, const STqOffset* pOffset) {
   return taosHashPut(pStore->pHash, pOffset->subKey, strlen(pOffset->subKey), pOffset, sizeof(STqOffset));
 }
 
+int32_t tqOffsetDelete(STqOffsetStore* pStore, const char* subscribeKey) {
+  return taosHashRemove(pStore->pHash, subscribeKey, strlen(subscribeKey));
+}
+
 int32_t tqOffsetSnapshot(STqOffsetStore* pStore) {
   // open file
   // TODO file name should be with a version
diff --git a/source/dnode/vnode/src/tq/tqRead.c b/source/dnode/vnode/src/tq/tqRead.c
index 7d7b9636df..9e5c67fed4 100644
--- a/source/dnode/vnode/src/tq/tqRead.c
+++ b/source/dnode/vnode/src/tq/tqRead.c
@@ -15,13 +15,13 @@
 
 #include "tq.h"
 
-int64_t tqFetchLog(STQ* pTq, STqHandle* pHandle, int64_t* fetchOffset, SWalHead** ppHeadWithCkSum) {
+int64_t tqFetchLog(STQ* pTq, STqHandle* pHandle, int64_t* fetchOffset, SWalCkHead** ppCkHead) {
   int32_t code = 0;
   taosThreadMutexLock(&pHandle->pWalReader->mutex);
   int64_t offset = *fetchOffset;
 
   while (1) {
-    if (walFetchHead(pHandle->pWalReader, offset, *ppHeadWithCkSum) < 0) {
+    if (walFetchHead(pHandle->pWalReader, offset, *ppCkHead) < 0) {
       tqDebug("tmq poll: consumer %ld (epoch %d) vg %d offset %ld, no more log to return", pHandle->consumerId,
               pHandle->epoch, TD_VID(pTq->pVnode), offset);
       *fetchOffset = offset - 1;
@@ -29,8 +29,8 @@ int64_t tqFetchLog(STQ* pTq, STqHandle* pHandle, int64_t* fetchOffset, SWalHead*
       goto END;
     }
 
-    if ((*ppHeadWithCkSum)->head.msgType == TDMT_VND_SUBMIT) {
-      code = walFetchBody(pHandle->pWalReader, ppHeadWithCkSum);
+    if ((*ppCkHead)->head.msgType == TDMT_VND_SUBMIT) {
+      code = walFetchBody(pHandle->pWalReader, ppCkHead);
 
       if (code < 0) {
         ASSERT(0);
@@ -43,9 +43,9 @@ int64_t tqFetchLog(STQ* pTq, STqHandle* pHandle, int64_t* fetchOffset, SWalHead*
       goto END;
     } else {
       if (pHandle->fetchMeta) {
-        SWalReadHead* pHead = &((*ppHeadWithCkSum)->head);
+        SWalCont* pHead = &((*ppCkHead)->head);
         if (IS_META_MSG(pHead->msgType)) {
-          code = walFetchBody(pHandle->pWalReader, ppHeadWithCkSum);
+          code = walFetchBody(pHandle->pWalReader, ppCkHead);
 
           if (code < 0) {
             ASSERT(0);
@@ -58,7 +58,7 @@ int64_t tqFetchLog(STQ* pTq, STqHandle* pHandle, int64_t* fetchOffset, SWalHead*
           goto END;
         }
       }
-      code = walSkipFetchBody(pHandle->pWalReader, *ppHeadWithCkSum);
+      code = walSkipFetchBody(pHandle->pWalReader, *ppCkHead);
       if (code < 0) {
         ASSERT(0);
         *fetchOffset = offset;
diff --git a/source/libs/executor/inc/executorimpl.h b/source/libs/executor/inc/executorimpl.h
index 9872f26b03..d1d2c55acf 100644
--- a/source/libs/executor/inc/executorimpl.h
+++ b/source/libs/executor/inc/executorimpl.h
@@ -287,6 +287,7 @@ typedef struct STableScanInfo {
   } lastStatus;
 
   int8_t scanMode;
+  int8_t noTable;
 } STableScanInfo;
 
 typedef struct STagScanInfo {
diff --git a/source/libs/executor/src/executorMain.c b/source/libs/executor/src/executorMain.c
index 8dd8005225..2d5ccf8568 100644
--- a/source/libs/executor/src/executorMain.c
+++ b/source/libs/executor/src/executorMain.c
@@ -235,9 +235,11 @@ int32_t qStreamPrepareScan(qTaskInfo_t tinfo, uint64_t uid, int64_t ts) {
   SExecTaskInfo* pTaskInfo = (SExecTaskInfo*)tinfo;
 
   if (uid == 0) {
-    STableKeyInfo* pTableInfo = taosArrayGet(pTaskInfo->tableqinfoList.pTableList, 0);
-    uid = pTableInfo->uid;
-    ts = INT64_MIN;
+    if (taosArrayGetSize(pTaskInfo->tableqinfoList.pTableList) != 0) {
+      STableKeyInfo* pTableInfo = taosArrayGet(pTaskInfo->tableqinfoList.pTableList, 0);
+      uid = pTableInfo->uid;
+      ts = INT64_MIN;
+    }
   }
 
   return doPrepareScan(pTaskInfo->pRoot, uid, ts);
diff --git a/source/libs/executor/src/executorimpl.c b/source/libs/executor/src/executorimpl.c
index 61bf73c69c..c7dd288617 100644
--- a/source/libs/executor/src/executorimpl.c
+++ b/source/libs/executor/src/executorimpl.c
@@ -2829,21 +2829,28 @@ int32_t doPrepareScan(SOperatorInfo* pOperator, uint64_t uid, int64_t ts) {
     pScanInfo->blockType = STREAM_INPUT__DATA_SCAN;
 
     STableScanInfo* pInfo = pScanInfo->pSnapshotReadOp->info;
+    if (uid == 0) {
+      pInfo->noTable = 1;
+      return TSDB_CODE_SUCCESS;
+    }
 
     /*if (pSnapShotScanInfo->dataReader == NULL) {*/
     /*pSnapShotScanInfo->dataReader = tsdbReaderOpen(pHandle->vnode, &pSTInfo->cond, tableList, 0, 0);*/
     /*pSnapShotScanInfo->scanMode = TABLE_SCAN__TABLE_ORDER;*/
     /*}*/
 
+    pInfo->noTable = 0;
+
     if (pInfo->lastStatus.uid != uid || pInfo->lastStatus.ts != ts) {
       tsdbSetTableId(pInfo->dataReader, uid);
       int64_t oldSkey = pInfo->cond.twindows[0].skey;
-      pInfo->cond.twindows[0].skey = ts;
+      pInfo->cond.twindows[0].skey = ts + 1;
       tsdbResetReadHandle(pInfo->dataReader, &pInfo->cond, 0);
       pInfo->cond.twindows[0].skey = oldSkey;
       pInfo->scanTimes = 0;
       pInfo->curTWinIdx = 0;
     }
+    return TSDB_CODE_SUCCESS;
 
   } else {
     if (pOperator->numOfDownstream == 1) {
@@ -2856,8 +2863,6 @@ int32_t doPrepareScan(SOperatorInfo* pOperator, uint64_t uid, int64_t ts) {
       return TSDB_CODE_QRY_APP_ERROR;
     }
   }
-
-  return TSDB_CODE_SUCCESS;
 }
 
 int32_t doGetScanStatus(SOperatorInfo* pOperator, uint64_t* uid, int64_t* ts) {
diff --git a/source/libs/executor/src/scanoperator.c b/source/libs/executor/src/scanoperator.c
index 504618d8a4..89a47f4e2c 100644
--- a/source/libs/executor/src/scanoperator.c
+++ b/source/libs/executor/src/scanoperator.c
@@ -518,6 +518,7 @@ static SSDataBlock* doTableScan(SOperatorInfo* pOperator) {
 
   // if scan table by table
   if (pInfo->scanMode == TABLE_SCAN__TABLE_ORDER) {
+    if (pInfo->noTable) return NULL;
     while (1) {
       SSDataBlock* result = doTableScanGroup(pOperator);
       if (result) {
diff --git a/source/libs/stream/src/streamData.c b/source/libs/stream/src/streamData.c
index e9b311db9a..529615d4fd 100644
--- a/source/libs/stream/src/streamData.c
+++ b/source/libs/stream/src/streamData.c
@@ -88,3 +88,12 @@ SStreamDataSubmit* streamSubmitRefClone(SStreamDataSubmit* pSubmit) {
   memcpy(pSubmitClone, pSubmit, sizeof(SStreamDataSubmit));
   return pSubmitClone;
 }
+
+void streamDataSubmitRefDec(SStreamDataSubmit* pDataSubmit) {
+  int32_t ref = atomic_sub_fetch_32(pDataSubmit->dataRef, 1);
+  ASSERT(ref >= 0);
+  if (ref == 0) {
+    taosMemoryFree(pDataSubmit->data);
+    taosMemoryFree(pDataSubmit->dataRef);
+  }
+}
diff --git a/source/libs/stream/src/streamExec.c b/source/libs/stream/src/streamExec.c
index b3be35fba3..d178c19615 100644
--- a/source/libs/stream/src/streamExec.c
+++ b/source/libs/stream/src/streamExec.c
@@ -63,7 +63,6 @@ static int32_t streamTaskExecImpl(SStreamTask* pTask, void* data, SArray* pRes)
       continue;
     }
 
-    // TODO: do we need free memory?
     SSDataBlock block = {0};
     assignOneDataBlock(&block, output);
     block.info.childId = pTask->selfChildId;
diff --git a/source/libs/stream/src/streamQueue.c b/source/libs/stream/src/streamQueue.c
index d5a4da60f5..f82ef1b42f 100644
--- a/source/libs/stream/src/streamQueue.c
+++ b/source/libs/stream/src/streamQueue.c
@@ -41,12 +41,3 @@ void streamQueueClose(SStreamQueue* queue) {
       return;
   }
 }
-
-void streamDataSubmitRefDec(SStreamDataSubmit* pDataSubmit) {
-  int32_t ref = atomic_sub_fetch_32(pDataSubmit->dataRef, 1);
-  ASSERT(ref >= 0);
-  if (ref == 0) {
-    taosMemoryFree(pDataSubmit->data);
-    taosMemoryFree(pDataSubmit->dataRef);
-  }
-}
diff --git a/source/libs/wal/inc/walInt.h b/source/libs/wal/inc/walInt.h
index 7ca105ff2b..c23d0802c1 100644
--- a/source/libs/wal/inc/walInt.h
+++ b/source/libs/wal/inc/walInt.h
@@ -27,7 +27,7 @@ extern "C" {
 #endif
 
 // meta section begin
-typedef struct WalFileInfo {
+typedef struct {
   int64_t firstVer;
   int64_t lastVer;
   int64_t createTs;
@@ -98,20 +98,20 @@ static inline int walBuildIdxName(SWal* pWal, int64_t fileFirstVer, char* buf) {
   return sprintf(buf, "%s/%020" PRId64 "." WAL_INDEX_SUFFIX, pWal->path, fileFirstVer);
 }
 
-static inline int walValidHeadCksum(SWalHead* pHead) {
-  return taosCheckChecksum((uint8_t*)&pHead->head, sizeof(SWalReadHead), pHead->cksumHead);
+static inline int walValidHeadCksum(SWalCkHead* pHead) {
+  return taosCheckChecksum((uint8_t*)&pHead->head, sizeof(SWalCont), pHead->cksumHead);
 }
 
-static inline int walValidBodyCksum(SWalHead* pHead) {
+static inline int walValidBodyCksum(SWalCkHead* pHead) {
   return taosCheckChecksum((uint8_t*)pHead->head.body, pHead->head.bodyLen, pHead->cksumBody);
 }
 
-static inline int walValidCksum(SWalHead* pHead, void* body, int64_t bodyLen) {
+static inline int walValidCksum(SWalCkHead* pHead, void* body, int64_t bodyLen) {
   return walValidHeadCksum(pHead) && walValidBodyCksum(pHead);
 }
 
-static inline uint32_t walCalcHeadCksum(SWalHead* pHead) {
-  return taosCalcChecksum(0, (uint8_t*)&pHead->head, sizeof(SWalReadHead));
+static inline uint32_t walCalcHeadCksum(SWalCkHead* pHead) {
+  return taosCalcChecksum(0, (uint8_t*)&pHead->head, sizeof(SWalCont));
 }
 
 static inline uint32_t walCalcBodyCksum(const void* body, uint32_t len) {
diff --git a/source/libs/wal/src/walMeta.c b/source/libs/wal/src/walMeta.c
index 342ab7b152..313fd06c8e 100644
--- a/source/libs/wal/src/walMeta.c
+++ b/source/libs/wal/src/walMeta.c
@@ -16,7 +16,7 @@
 #include "cJSON.h"
 #include "os.h"
 #include "taoserror.h"
-#include "tref.h"
+#include "tutil.h"
 #include "walInt.h"
 
 bool FORCE_INLINE walLogExist(SWal* pWal, int64_t ver) {
@@ -37,26 +37,9 @@ static FORCE_INLINE int walBuildMetaName(SWal* pWal, int metaVer, char* buf) {
   return sprintf(buf, "%s/meta-ver%d", pWal->path, metaVer);
 }
 
-void* tmemmem(char* haystack, int hlen, char* needle, int nlen) {
-  char* limit;
-
-  if (nlen == 0 || hlen < nlen) {
-    return NULL;
-  }
-
-  limit = haystack + hlen - nlen + 1;
-  while ((haystack = (char*)memchr(haystack, needle[0], limit - haystack)) != NULL) {
-    if (memcmp(haystack, needle, nlen) == 0) {
-      return haystack;
-    }
-    haystack++;
-  }
-  return NULL;
-}
-
 static FORCE_INLINE int64_t walScanLogGetLastVer(SWal* pWal) {
   ASSERT(pWal->fileInfoSet != NULL);
-  int sz = taosArrayGetSize(pWal->fileInfoSet);
+  int32_t sz = taosArrayGetSize(pWal->fileInfoSet);
   ASSERT(sz > 0);
 #if 0
   for (int i = 0; i < sz; i++) {
@@ -101,14 +84,14 @@ static FORCE_INLINE int64_t walScanLogGetLastVer(SWal* pWal) {
   char* candidate;
   while ((candidate = tmemmem(haystack, readSize - (haystack - buf), (char*)&magic, sizeof(uint64_t))) != NULL) {
     // read and validate
-    SWalHead* logContent = (SWalHead*)candidate;
+    SWalCkHead* logContent = (SWalCkHead*)candidate;
     if (walValidHeadCksum(logContent) == 0 && walValidBodyCksum(logContent) == 0) {
       found = candidate;
     }
     haystack = candidate + 1;
   }
   if (found == buf) {
-    SWalHead* logContent = (SWalHead*)found;
+    SWalCkHead* logContent = (SWalCkHead*)found;
     if (walValidHeadCksum(logContent) != 0 || walValidBodyCksum(logContent) != 0) {
       // file has to be deleted
       taosMemoryFree(buf);
@@ -118,7 +101,7 @@ static FORCE_INLINE int64_t walScanLogGetLastVer(SWal* pWal) {
     }
   }
   taosCloseFile(&pFile);
-  SWalHead* lastEntry = (SWalHead*)found;
+  SWalCkHead* lastEntry = (SWalCkHead*)found;
 
   return lastEntry->head.version;
 }
diff --git a/source/libs/wal/src/walMgmt.c b/source/libs/wal/src/walMgmt.c
index 9505b02806..491b982968 100644
--- a/source/libs/wal/src/walMgmt.c
+++ b/source/libs/wal/src/walMgmt.c
@@ -117,8 +117,8 @@ SWal *walOpen(const char *path, SWalCfg *pCfg) {
   pWal->lastRollSeq = -1;
 
   // init write buffer
-  memset(&pWal->writeHead, 0, sizeof(SWalHead));
-  pWal->writeHead.head.headVer = WAL_HEAD_VER;
+  memset(&pWal->writeHead, 0, sizeof(SWalCkHead));
+  pWal->writeHead.head.protoVer = WAL_PROTO_VER;
   pWal->writeHead.magic = WAL_MAGIC;
 
   if (taosThreadMutexInit(&pWal->mutex, NULL) < 0) {
diff --git a/source/libs/wal/src/walRead.c b/source/libs/wal/src/walRead.c
index 2de0fea9ac..e7f0b31ccc 100644
--- a/source/libs/wal/src/walRead.c
+++ b/source/libs/wal/src/walRead.c
@@ -33,7 +33,7 @@ SWalReadHandle *walOpenReadHandle(SWal *pWal) {
 
   taosThreadMutexInit(&pRead->mutex, NULL);
 
-  pRead->pHead = taosMemoryMalloc(sizeof(SWalHead));
+  pRead->pHead = taosMemoryMalloc(sizeof(SWalCkHead));
   if (pRead->pHead == NULL) {
     terrno = TSDB_CODE_WAL_OUT_OF_MEMORY;
     taosMemoryFree(pRead);
@@ -155,7 +155,7 @@ static int32_t walReadSeekVer(SWalReadHandle *pRead, int64_t ver) {
 
 void walSetReaderCapacity(SWalReadHandle *pRead, int32_t capacity) { pRead->capacity = capacity; }
 
-int32_t walFetchHead(SWalReadHandle *pRead, int64_t ver, SWalHead *pHead) {
+int32_t walFetchHead(SWalReadHandle *pRead, int64_t ver, SWalCkHead *pHead) {
   int64_t code;
 
   // TODO: valid ver
@@ -170,8 +170,8 @@ int32_t walFetchHead(SWalReadHandle *pRead, int64_t ver, SWalHead *pHead) {
 
   ASSERT(taosValidFile(pRead->pReadLogTFile) == true);
 
-  code = taosReadFile(pRead->pReadLogTFile, pHead, sizeof(SWalHead));
-  if (code != sizeof(SWalHead)) {
+  code = taosReadFile(pRead->pReadLogTFile, pHead, sizeof(SWalCkHead));
+  if (code != sizeof(SWalCkHead)) {
     return -1;
   }
 
@@ -186,7 +186,7 @@ int32_t walFetchHead(SWalReadHandle *pRead, int64_t ver, SWalHead *pHead) {
   return 0;
 }
 
-int32_t walSkipFetchBody(SWalReadHandle *pRead, const SWalHead *pHead) {
+int32_t walSkipFetchBody(SWalReadHandle *pRead, const SWalCkHead *pHead) {
   int64_t code;
 
   ASSERT(pRead->curVersion == pHead->head.version);
@@ -203,12 +203,12 @@ int32_t walSkipFetchBody(SWalReadHandle *pRead, const SWalHead *pHead) {
   return 0;
 }
 
-int32_t walFetchBody(SWalReadHandle *pRead, SWalHead **ppHead) {
-  SWalReadHead *pReadHead = &((*ppHead)->head);
-  int64_t       ver = pReadHead->version;
+int32_t walFetchBody(SWalReadHandle *pRead, SWalCkHead **ppHead) {
+  SWalCont *pReadHead = &((*ppHead)->head);
+  int64_t   ver = pReadHead->version;
 
   if (pRead->capacity < pReadHead->bodyLen) {
-    void *ptr = taosMemoryRealloc(*ppHead, sizeof(SWalHead) + pReadHead->bodyLen);
+    void *ptr = taosMemoryRealloc(*ppHead, sizeof(SWalCkHead) + pReadHead->bodyLen);
     if (ptr == NULL) {
       terrno = TSDB_CODE_WAL_OUT_OF_MEMORY;
       return -1;
@@ -241,18 +241,18 @@ int32_t walFetchBody(SWalReadHandle *pRead, SWalHead **ppHead) {
   return 0;
 }
 
-int32_t walReadWithHandle_s(SWalReadHandle *pRead, int64_t ver, SWalReadHead **ppHead) {
+int32_t walReadWithHandle_s(SWalReadHandle *pRead, int64_t ver, SWalCont **ppHead) {
   taosThreadMutexLock(&pRead->mutex);
   if (walReadWithHandle(pRead, ver) < 0) {
     taosThreadMutexUnlock(&pRead->mutex);
     return -1;
   }
-  *ppHead = taosMemoryMalloc(sizeof(SWalReadHead) + pRead->pHead->head.bodyLen);
+  *ppHead = taosMemoryMalloc(sizeof(SWalCont) + pRead->pHead->head.bodyLen);
   if (*ppHead == NULL) {
     taosThreadMutexUnlock(&pRead->mutex);
     return -1;
   }
-  memcpy(*ppHead, &pRead->pHead->head, sizeof(SWalReadHead) + pRead->pHead->head.bodyLen);
+  memcpy(*ppHead, &pRead->pHead->head, sizeof(SWalCont) + pRead->pHead->head.bodyLen);
   taosThreadMutexUnlock(&pRead->mutex);
   return 0;
 }
@@ -282,8 +282,8 @@ int32_t walReadWithHandle(SWalReadHandle *pRead, int64_t ver) {
 
   ASSERT(taosValidFile(pRead->pReadLogTFile) == true);
 
-  code = taosReadFile(pRead->pReadLogTFile, pRead->pHead, sizeof(SWalHead));
-  if (code != sizeof(SWalHead)) {
+  code = taosReadFile(pRead->pReadLogTFile, pRead->pHead, sizeof(SWalCkHead));
+  if (code != sizeof(SWalCkHead)) {
     if (code < 0)
       terrno = TAOS_SYSTEM_ERROR(errno);
     else {
@@ -301,7 +301,7 @@ int32_t walReadWithHandle(SWalReadHandle *pRead, int64_t ver) {
   }
 
   if (pRead->capacity < pRead->pHead->head.bodyLen) {
-    void *ptr = taosMemoryRealloc(pRead->pHead, sizeof(SWalHead) + pRead->pHead->head.bodyLen);
+    void *ptr = taosMemoryRealloc(pRead->pHead, sizeof(SWalCkHead) + pRead->pHead->head.bodyLen);
     if (ptr == NULL) {
       terrno = TSDB_CODE_WAL_OUT_OF_MEMORY;
       return -1;
diff --git a/source/libs/wal/src/walWrite.c b/source/libs/wal/src/walWrite.c
index d1295667af..9245c03826 100644
--- a/source/libs/wal/src/walWrite.c
+++ b/source/libs/wal/src/walWrite.c
@@ -142,10 +142,10 @@ int32_t walRollback(SWal *pWal, int64_t ver) {
     return -1;
   }
   // validate offset
-  SWalHead head;
+  SWalCkHead head;
   ASSERT(taosValidFile(pLogTFile));
-  int64_t size = taosReadFile(pLogTFile, &head, sizeof(SWalHead));
-  if (size != sizeof(SWalHead)) {
+  int64_t size = taosReadFile(pLogTFile, &head, sizeof(SWalCkHead));
+  if (size != sizeof(SWalCkHead)) {
     return -1;
   }
   code = walValidHeadCksum(&head);
@@ -261,7 +261,7 @@ int32_t walEndSnapshot(SWal *pWal) {
 }
 
 int walRoll(SWal *pWal) {
-  int code = 0;
+  int32_t code = 0;
   if (pWal->pWriteIdxTFile != NULL) {
     code = taosCloseFile(&pWal->pWriteIdxTFile);
     if (code != 0) {
@@ -321,12 +321,13 @@ static int walWriteIndex(SWal *pWal, int64_t ver, int64_t offset) {
   return 0;
 }
 
-int64_t walWriteWithSyncInfo(SWal *pWal, int64_t index, tmsg_t msgType, SSyncLogMeta syncMeta, const void *body,
+int32_t walWriteWithSyncInfo(SWal *pWal, int64_t index, tmsg_t msgType, SSyncLogMeta syncMeta, const void *body,
                              int32_t bodyLen) {
-  int code = 0;
+  int32_t code = 0;
 
   // no wal
   if (pWal->cfg.level == TAOS_WAL_NOLOG) return 0;
+
   if (bodyLen > TSDB_MAX_WAL_SIZE) {
     terrno = TSDB_CODE_WAL_SIZE_LIMIT;
     return -1;
@@ -356,6 +357,7 @@ int64_t walWriteWithSyncInfo(SWal *pWal, int64_t index, tmsg_t msgType, SSyncLog
     terrno = TSDB_CODE_WAL_INVALID_VER;
     return -1;
   }
+
   /*if (!tfValid(pWal->pWriteLogTFile)) return -1;*/
 
   ASSERT(pWal->writeCur >= 0);
@@ -380,7 +382,7 @@ int64_t walWriteWithSyncInfo(SWal *pWal, int64_t index, tmsg_t msgType, SSyncLog
   pWal->writeHead.cksumHead = walCalcHeadCksum(&pWal->writeHead);
   pWal->writeHead.cksumBody = walCalcBodyCksum(body, bodyLen);
 
-  if (taosWriteFile(pWal->pWriteLogTFile, &pWal->writeHead, sizeof(SWalHead)) != sizeof(SWalHead)) {
+  if (taosWriteFile(pWal->pWriteLogTFile, &pWal->writeHead, sizeof(SWalCkHead)) != sizeof(SWalCkHead)) {
     // TODO ftruncate
     terrno = TAOS_SYSTEM_ERROR(errno);
     wError("vgId:%d, file:%" PRId64 ".log, failed to write since %s", pWal->cfg.vgId, walGetLastFileFirstVer(pWal),
@@ -405,19 +407,19 @@ int64_t walWriteWithSyncInfo(SWal *pWal, int64_t index, tmsg_t msgType, SSyncLog
   // set status
   if (pWal->vers.firstVer == -1) pWal->vers.firstVer = index;
   pWal->vers.lastVer = index;
-  pWal->totSize += sizeof(SWalHead) + bodyLen;
+  pWal->totSize += sizeof(SWalCkHead) + bodyLen;
   if (walGetCurFileInfo(pWal)->firstVer == -1) {
     walGetCurFileInfo(pWal)->firstVer = index;
   }
   walGetCurFileInfo(pWal)->lastVer = index;
-  walGetCurFileInfo(pWal)->fileSize += sizeof(SWalHead) + bodyLen;
+  walGetCurFileInfo(pWal)->fileSize += sizeof(SWalCkHead) + bodyLen;
 
   taosThreadMutexUnlock(&pWal->mutex);
 
   return 0;
 }
 
-int64_t walWrite(SWal *pWal, int64_t index, tmsg_t msgType, const void *body, int32_t bodyLen) {
+int32_t walWrite(SWal *pWal, int64_t index, tmsg_t msgType, const void *body, int32_t bodyLen) {
   SSyncLogMeta syncMeta = {
       .isWeek = -1,
       .seqNum = UINT64_MAX,
@@ -435,27 +437,3 @@ void walFsync(SWal *pWal, bool forceFsync) {
     }
   }
 }
-
-/*static int walValidateOffset(SWal* pWal, int64_t ver) {*/
-/*int code = 0;*/
-/*SWalHead *pHead = NULL;*/
-/*code = (int)walRead(pWal, &pHead, ver);*/
-/*if(pHead->head.version != ver) {*/
-/*return -1;*/
-/*}*/
-/*return 0;*/
-/*}*/
-
-/*static int64_t walGetOffset(SWal* pWal, int64_t ver) {*/
-/*int code = walSeekVer(pWal, ver);*/
-/*if(code != 0) {*/
-/*return -1;*/
-/*}*/
-
-/*code = walValidateOffset(pWal, ver);*/
-/*if(code != 0) {*/
-/*return -1;*/
-/*}*/
-
-/*return 0;*/
-/*}*/
diff --git a/source/libs/wal/test/walMetaTest.cpp b/source/libs/wal/test/walMetaTest.cpp
index b1c673e87b..89c4fd9ef2 100644
--- a/source/libs/wal/test/walMetaTest.cpp
+++ b/source/libs/wal/test/walMetaTest.cpp
@@ -148,7 +148,7 @@ TEST_F(WalCleanEnv, createNew) {
   walRollFileInfo(pWal);
   ASSERT(pWal->fileInfoSet != NULL);
   ASSERT_EQ(pWal->fileInfoSet->size, 1);
-  WalFileInfo* pInfo = (WalFileInfo*)taosArrayGetLast(pWal->fileInfoSet);
+  SWalFileInfo* pInfo = (SWalFileInfo*)taosArrayGetLast(pWal->fileInfoSet);
   ASSERT_EQ(pInfo->firstVer, 0);
   ASSERT_EQ(pInfo->lastVer, -1);
   ASSERT_EQ(pInfo->closeTs, -1);
diff --git a/source/os/src/osFile.c b/source/os/src/osFile.c
index 291d38bdca..65471df0a9 100644
--- a/source/os/src/osFile.c
+++ b/source/os/src/osFile.c
@@ -300,16 +300,14 @@ TdFilePtr taosOpenFile(const char *path, int32_t tdFileOptions) {
   return pFile;
 }
 
-int64_t taosCloseFile(TdFilePtr *ppFile) {
+int32_t taosCloseFile(TdFilePtr *ppFile) {
+  int32_t code = 0;
   if (ppFile == NULL || *ppFile == NULL) {
     return 0;
   }
 #if FILE_WITH_LOCK
   taosThreadRwlockWrlock(&((*ppFile)->rwlock));
 #endif
-  if (ppFile == NULL || *ppFile == NULL) {
-    return 0;
-  }
   if ((*ppFile)->fp != NULL) {
     fflush((*ppFile)->fp);
     fclose((*ppFile)->fp);
@@ -320,9 +318,10 @@ int64_t taosCloseFile(TdFilePtr *ppFile) {
     HANDLE h = (HANDLE)_get_osfhandle((*ppFile)->fd);
     !FlushFileBuffers(h);
 #else
-    fsync((*ppFile)->fd);
+    // warning: never fsync silently in base lib
+    /*fsync((*ppFile)->fd);*/
 #endif
-    close((*ppFile)->fd);
+    code = close((*ppFile)->fd);
     (*ppFile)->fd = -1;
   }
   (*ppFile)->refId = 0;
@@ -332,7 +331,7 @@ int64_t taosCloseFile(TdFilePtr *ppFile) {
 #endif
   taosMemoryFree(*ppFile);
   *ppFile = NULL;
-  return 0;
+  return code;
 }
 
 int64_t taosReadFile(TdFilePtr pFile, void *buf, int64_t count) {
@@ -560,6 +559,8 @@ int32_t taosFsyncFile(TdFilePtr pFile) {
     return 0;
   }
 
+  // this implementation is WRONG
+  // fflush is not a replacement of fsync
   if (pFile->fp != NULL) return fflush(pFile->fp);
   if (pFile->fd >= 0) {
 #ifdef WINDOWS
diff --git a/source/util/src/tarray.c b/source/util/src/tarray.c
index 23e79da948..d16d0e610a 100644
--- a/source/util/src/tarray.c
+++ b/source/util/src/tarray.c
@@ -206,11 +206,11 @@ void* taosArrayGetP(const SArray* pArray, size_t index) {
 
 void* taosArrayGetLast(const SArray* pArray) { return TARRAY_GET_ELEM(pArray, pArray->size - 1); }
 
-size_t taosArrayGetSize(const SArray* pArray) {
+int32_t taosArrayGetSize(const SArray* pArray) {
   if (pArray == NULL) {
     return 0;
   }
-  return pArray->size;
+  return (int32_t)pArray->size;
 }
 
 void taosArraySetSize(SArray* pArray, size_t size) {
diff --git a/source/util/src/tutil.c b/source/util/src/tutil.c
index 0534eb3462..addb9f55ba 100644
--- a/source/util/src/tutil.c
+++ b/source/util/src/tutil.c
@@ -16,6 +16,23 @@
 #define _DEFAULT_SOURCE
 #include "tutil.h"
 
+void *tmemmem(const char *haystack, int32_t hlen, const char *needle, int32_t nlen) {
+  const char *limit;
+
+  if (nlen == 0 || hlen < nlen) {
+    return NULL;
+  }
+
+  limit = haystack + hlen - nlen + 1;
+  while ((haystack = (char *)memchr(haystack, needle[0], limit - haystack)) != NULL) {
+    if (memcmp(haystack, needle, nlen) == 0) {
+      return (void *)haystack;
+    }
+    haystack++;
+  }
+  return NULL;
+}
+
 int32_t strdequote(char *z) {
   if (z == NULL) {
     return 0;