diff --git a/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c b/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
index 4cc1b8527c57f297d93383019d5c847648ec5945..7fc263c93cbf3fd4f4649c5ce7502d957629ed95 100644
--- a/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
+++ b/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
@@ -202,6 +202,17 @@ int32_t vmProcessCreateVnodeReq(SVnodesMgmt *pMgmt, SNodeMsg *pMsg) {
     return code;
   }
 
+  code = vnodeStart(pImpl);
+  if (code != 0) {
+    tFreeSCreateVnodeReq(&createReq);
+    dError("vgId:%d, failed to start sync since %s", createReq.vgId, terrstr());
+    vnodeClose(pImpl);
+    vnodeDestroy(path, pMgmt->pTfs);
+    terrno = code;
+    return code;
+  }
+
+
   code = vmWriteVnodesToFile(pMgmt);
   if (code != 0) {
     tFreeSCreateVnodeReq(&createReq);
diff --git a/source/dnode/mgmt/mgmt_vnode/src/vmInt.c b/source/dnode/mgmt/mgmt_vnode/src/vmInt.c
index 687a799c575baeb13603f2d37edcb8e4e6895bd2..3088c5dea40f92b5ef9a8b2b582ef8bfedc66d58 100644
--- a/source/dnode/mgmt/mgmt_vnode/src/vmInt.c
+++ b/source/dnode/mgmt/mgmt_vnode/src/vmInt.c
@@ -74,12 +74,6 @@ int32_t vmOpenVnode(SVnodesMgmt *pMgmt, SWrapperCfg *pCfg, SVnode *pImpl) {
     return -1;
   }
 
-  // sync integration
-  vnodeSyncSetQ(pImpl, NULL);
-  vnodeSyncSetRpc(pImpl, NULL);
-  int32_t ret = vnodeSyncStart(pImpl);
-  assert(ret == 0);
-
   taosWLockLatch(&pMgmt->latch);
   int32_t code = taosHashPut(pMgmt->hash, &pVnode->vgId, sizeof(int32_t), &pVnode, sizeof(SVnodeObj *));
   taosWUnLockLatch(&pMgmt->latch);
@@ -153,6 +147,7 @@ static void *vmOpenVnodeFunc(void *param) {
       pThread->failed++;
     } else {
       vmOpenVnode(pMgmt, pCfg, pImpl);
+      //vnodeStart(pImpl);
       dDebug("vgId:%d, is opened by thread:%d", pCfg->vgId, pThread->threadIndex);
       pThread->opened++;
     }
@@ -364,10 +359,52 @@ static int32_t vmRequire(SMgmtWrapper *pWrapper, bool *required) {
   return 0;
 }
 
+static int32_t vmStart(SMgmtWrapper *pWrapper) {
+  dDebug("vnode-mgmt start to run");
+  SVnodesMgmt *pMgmt = pWrapper->pMgmt;
+
+  taosRLockLatch(&pMgmt->latch);
+
+  void *pIter = taosHashIterate(pMgmt->hash, NULL);
+  while (pIter) {
+    SVnodeObj **ppVnode = pIter;
+    if (ppVnode == NULL || *ppVnode == NULL) continue;
+
+    SVnodeObj *pVnode = *ppVnode;
+    vnodeStart(pVnode->pImpl);
+    pIter = taosHashIterate(pMgmt->hash, pIter);
+  }
+
+  taosRUnLockLatch(&pMgmt->latch);
+  return 0;
+}
+
+static void vmStop(SMgmtWrapper *pWrapper) {
+#if 0
+  dDebug("vnode-mgmt start to stop");
+  SVnodesMgmt *pMgmt = pWrapper->pMgmt;
+  taosRLockLatch(&pMgmt->latch);
+
+  void *pIter = taosHashIterate(pMgmt->hash, NULL);
+  while (pIter) {
+    SVnodeObj **ppVnode = pIter;
+    if (ppVnode == NULL || *ppVnode == NULL) continue;
+
+    SVnodeObj *pVnode = *ppVnode;
+    vnodeStop(pVnode->pImpl);
+    pIter = taosHashIterate(pMgmt->hash, pIter);
+  }
+
+  taosRUnLockLatch(&pMgmt->latch);
+#endif
+}
+
 void vmSetMgmtFp(SMgmtWrapper *pWrapper) {
   SMgmtFp mgmtFp = {0};
   mgmtFp.openFp = vmInit;
   mgmtFp.closeFp = vmCleanup;
+  mgmtFp.startFp = vmStart;
+  mgmtFp.stopFp = vmStop;
   mgmtFp.requiredFp = vmRequire;
 
   vmInitMsgHandle(pWrapper);
@@ -396,4 +433,4 @@ void vmGetVnodeLoads(SMgmtWrapper *pWrapper, SMonVloadInfo *pInfo) {
   }
 
   taosRUnLockLatch(&pMgmt->latch);
-}
\ No newline at end of file
+}
diff --git a/source/dnode/vnode/inc/vnode.h b/source/dnode/vnode/inc/vnode.h
index f4975c183e26da5f7a198451e1df134fea6e657b..9eab4d33760f91a588d151a9b1c2196c4cb6b43f 100644
--- a/source/dnode/vnode/inc/vnode.h
+++ b/source/dnode/vnode/inc/vnode.h
@@ -61,6 +61,9 @@ int32_t vnodeSync(SVnode *pVnode);
 int32_t vnodeGetLoad(SVnode *pVnode, SVnodeLoad *pLoad);
 int     vnodeValidateTableHash(SVnodeCfg *pVnodeOptions, char *tableFName);
 
+int32_t vnodeStart(SVnode *pVnode);
+void    vnodeStop(SVnode *pVnode);
+
 int64_t vnodeGetSyncHandle(SVnode *pVnode);
 void    vnodeGetSnapshot(SVnode *pVnode, SSnapshot *pSnapshot);
 
@@ -171,11 +174,6 @@ typedef struct {
   uint64_t uid;
 } STableKeyInfo;
 
-// sync integration
-void    vnodeSyncSetQ(SVnode *pVnode, void *qHandle);
-void    vnodeSyncSetRpc(SVnode *pVnode, void *rpcHandle);
-int32_t vnodeSyncStart(SVnode *pVnode);
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/dnode/vnode/src/vnd/vnodeOpen.c b/source/dnode/vnode/src/vnd/vnodeOpen.c
index 2b10afa5ed9548b2f6397d6d3bd3487072b82c3a..11136bc7bad5f8982bdf3ec493171b49287a2d2c 100644
--- a/source/dnode/vnode/src/vnd/vnodeOpen.c
+++ b/source/dnode/vnode/src/vnd/vnodeOpen.c
@@ -14,6 +14,7 @@
  */
 
 #include "vnodeInt.h"
+#include "vnodeSync.h"
 
 int vnodeCreate(const char *path, SVnodeCfg *pCfg, STfs *pTfs) {
   SVnodeInfo info = {0};
@@ -171,6 +172,16 @@ void vnodeClose(SVnode *pVnode) {
   }
 }
 
+// start the sync timer after the queue is ready
+int32_t vnodeStart(SVnode *pVnode) {
+  vnodeSyncSetQ(pVnode, NULL);
+  vnodeSyncSetRpc(pVnode, NULL);
+  vnodeSyncStart(pVnode);
+  return 0;
+}
+
+void vnodeStop(SVnode *pVnode) {}
+
 int64_t vnodeGetSyncHandle(SVnode *pVnode) { return pVnode->sync; }
 
 void vnodeGetSnapshot(SVnode *pVnode, SSnapshot *pSnapshot) { pSnapshot->lastApplyIndex = pVnode->state.committed; }
\ No newline at end of file
diff --git a/source/libs/executor/src/executorimpl.c b/source/libs/executor/src/executorimpl.c
index 46f11663e3ddb241131843f74f2d93f80c906f19..434591c4c32b0f85214aac200eabb04f629a6b9e 100644
--- a/source/libs/executor/src/executorimpl.c
+++ b/source/libs/executor/src/executorimpl.c
@@ -268,7 +268,6 @@ SSDataBlock* createResDataBlock(SDataBlockDescNode* pNode) {
   int32_t numOfCols = LIST_LENGTH(pNode->pSlots);
 
   SSDataBlock* pBlock = taosMemoryCalloc(1, sizeof(SSDataBlock));
-  pBlock->info.numOfCols = numOfCols;
   pBlock->pDataBlock = taosArrayInit(numOfCols, sizeof(SColumnInfoData));
 
   pBlock->info.blockId = pNode->dataBlockId;
@@ -294,6 +293,7 @@ SSDataBlock* createResDataBlock(SDataBlockDescNode* pNode) {
     taosArrayPush(pBlock->pDataBlock, &idata);
   }
 
+  pBlock->info.numOfCols = taosArrayGetSize(pBlock->pDataBlock);
   return pBlock;
 }
 
@@ -1032,6 +1032,8 @@ static int32_t doCreateConstantValColumnInfo(SInputColumnInfoData* pInput, SFunc
     pColInfo->info.bytes = tDataTypes[type].bytes;
 
     pInput->pData[paramIndex] = pColInfo;
+  } else {
+    pColInfo = pInput->pData[paramIndex];
   }
 
   ASSERT(!IS_VAR_DATA_TYPE(type));
diff --git a/source/libs/function/src/builtins.c b/source/libs/function/src/builtins.c
index a52e39bd4f58343c0166145a9c444e7c366c0101..70087ee46bf3b2f49a8876372c1df75c8cdb582a 100644
--- a/source/libs/function/src/builtins.c
+++ b/source/libs/function/src/builtins.c
@@ -355,7 +355,7 @@ static int32_t translateToIso8601(SFunctionNode* pFunc, char* pErrBuf, int32_t l
     return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);
   }
 
-  pFunc->node.resType = (SDataType) { .bytes = 24, .type = TSDB_DATA_TYPE_BINARY};
+  pFunc->node.resType = (SDataType) { .bytes = 64, .type = TSDB_DATA_TYPE_BINARY};
   return TSDB_CODE_SUCCESS;
 }
 
diff --git a/source/libs/scalar/src/scalar.c b/source/libs/scalar/src/scalar.c
index 820a4894b5ed756bcacfe030211b24b35e86b11e..6773f8192b54b94fd1d395b7c362a99897d4156a 100644
--- a/source/libs/scalar/src/scalar.c
+++ b/source/libs/scalar/src/scalar.c
@@ -489,7 +489,7 @@ EDealRes sclRewriteFunction(SNode** pNode, SScalarCtx *ctx) {
   if (fmIsUserDefinedFunc(node->funcId)) {
     return DEAL_RES_CONTINUE;
   }
-  
+
   FOREACH(tnode, node->pParameterList) {
     if (!SCL_IS_CONST_NODE(tnode)) {
       return DEAL_RES_CONTINUE;
@@ -517,8 +517,8 @@ EDealRes sclRewriteFunction(SNode** pNode, SScalarCtx *ctx) {
     res->node.resType = node->node.resType;
     int32_t type = output.columnData->info.type;
     if (IS_VAR_DATA_TYPE(type)) {
-      res->datum.p = output.columnData->pData;
-      output.columnData->pData = NULL;
+      res->datum.p = taosMemoryCalloc(res->node.resType.bytes + VARSTR_HEADER_SIZE + 1, 1);
+      memcpy(res->datum.p, output.columnData->pData, varDataTLen(output.columnData->pData));
     } else {
       memcpy(nodesGetValueFromNode(res), output.columnData->pData, tDataTypes[type].bytes);
     }
diff --git a/source/util/src/terror.c b/source/util/src/terror.c
index 50c924bbb972e43d97fdf3fcfb5d51824d2a2b04..399a2255ac4403ee1a966a741545b6652211d1ea 100644
--- a/source/util/src/terror.c
+++ b/source/util/src/terror.c
@@ -403,6 +403,9 @@ TAOS_DEFINE_ERROR(TSDB_CODE_SYN_INVALID_CHECKSUM,         "Invalid msg checksum"
 TAOS_DEFINE_ERROR(TSDB_CODE_SYN_INVALID_MSGLEN,           "Invalid msg length")
 TAOS_DEFINE_ERROR(TSDB_CODE_SYN_INVALID_MSGTYPE,          "Invalid msg type")
 
+TAOS_DEFINE_ERROR(TSDB_CODE_SYN_NOT_LEADER,               "Sync not leader")
+TAOS_DEFINE_ERROR(TSDB_CODE_SYN_INTERNAL_ERROR,           "Sync internal error")
+
 // wal
 TAOS_DEFINE_ERROR(TSDB_CODE_WAL_APP_ERROR,                "Unexpected generic error in wal")
 TAOS_DEFINE_ERROR(TSDB_CODE_WAL_FILE_CORRUPTED,           "WAL file is corrupted")
diff --git a/tools/shell/src/shellCommand.c b/tools/shell/src/shellCommand.c
index c34ee7a22c6da4caf03ceae4b9a24744074eb4a0..fcdbf2d020568a206967f2db711365586aa0fa74 100644
--- a/tools/shell/src/shellCommand.c
+++ b/tools/shell/src/shellCommand.c
@@ -395,7 +395,7 @@ void shellClearScreen(int32_t ecmd_pos, int32_t cursor_pos) {
 void shellShowOnScreen(SShellCmd *cmd) {
   struct winsize w;
   if (ioctl(0, TIOCGWINSZ, &w) < 0 || w.ws_col == 0 || w.ws_row == 0) {
-    fprintf(stderr, "No stream device\n");
+    // fprintf(stderr, "No stream device\n");
     w.ws_col = 120;
     w.ws_row = 30;
   }
diff --git a/tools/shell/src/shellEngine.c b/tools/shell/src/shellEngine.c
index ac2be3c3cf89d45b032a3b26f3bafe7c218fce29..1f036ab25be42ede5ad7cdee03c4a70605804785 100644
--- a/tools/shell/src/shellEngine.c
+++ b/tools/shell/src/shellEngine.c
@@ -750,7 +750,7 @@ void shellReadHistory() {
 
 void shellWriteHistory() {
   SShellHistory *pHistory = &shell.history;
-  TdFilePtr      pFile = taosOpenFile(pHistory->file, TD_FILE_WRITE | TD_FILE_STREAM);
+  TdFilePtr      pFile = taosOpenFile(pHistory->file, TD_FILE_CREATE | TD_FILE_WRITE | TD_FILE_STREAM | TD_FILE_APPEND);
   if (pFile == NULL) return;
 
   for (int32_t i = pHistory->hstart; i != pHistory->hend;) {