diff --git a/source/dnode/mnode/impl/src/mndTopic.c b/source/dnode/mnode/impl/src/mndTopic.c
index 10bd7a7a8de8131724391513ad6a23971eab12d5..f1ee7bca3ba5c960adc66154e4b25aca6febbfc2 100644
--- a/source/dnode/mnode/impl/src/mndTopic.c
+++ b/source/dnode/mnode/impl/src/mndTopic.c
@@ -28,7 +28,7 @@
 #include "parser.h"
 #include "tname.h"
 
-#define MND_TOPIC_VER_NUMBER   2
+#define MND_TOPIC_VER_NUMBER   3
 #define MND_TOPIC_RESERVE_SIZE 64
 
 SSdbRaw *mndTopicActionEncode(SMqTopicObj *pTopic);
@@ -170,7 +170,7 @@ SSdbRow *mndTopicActionDecode(SSdbRaw *pRaw) {
   int8_t sver = 0;
   if (sdbGetRawSoftVer(pRaw, &sver) != 0) goto TOPIC_DECODE_OVER;
 
-  if (sver != 1 && sver != 2) {
+  if (sver < 1 || sver > MND_TOPIC_VER_NUMBER) {
     terrno = TSDB_CODE_SDB_INVALID_DATA_VER;
     goto TOPIC_DECODE_OVER;
   }
@@ -197,7 +197,9 @@ SSdbRow *mndTopicActionDecode(SSdbRaw *pRaw) {
   SDB_GET_INT8(pRaw, dataPos, &pTopic->withMeta, TOPIC_DECODE_OVER);
 
   SDB_GET_INT64(pRaw, dataPos, &pTopic->stbUid, TOPIC_DECODE_OVER);
-  SDB_GET_BINARY(pRaw, dataPos, pTopic->stbName, TSDB_TABLE_FNAME_LEN, TOPIC_DECODE_OVER);
+  if (sver >= 3) {
+    SDB_GET_BINARY(pRaw, dataPos, pTopic->stbName, TSDB_TABLE_FNAME_LEN, TOPIC_DECODE_OVER);
+  }
   SDB_GET_INT32(pRaw, dataPos, &pTopic->sqlLen, TOPIC_DECODE_OVER);
   pTopic->sql = taosMemoryCalloc(pTopic->sqlLen, sizeof(char));
   if (pTopic->sql == NULL) {
@@ -922,13 +924,12 @@ static int32_t mndRetrieveTopic(SRpcMsg *pReq, SShowObj *pShow, SSDataBlock *pBl
     }else if(pTopic->subType == TOPIC_SUB_TYPE__TABLE){
       SStbObj *pStb = mndAcquireStb(pMnode, pTopic->stbName);
       if (pStb == NULL) {
-        terrno = TSDB_CODE_MND_STB_NOT_EXIST;
-        taosMemoryFree(schemaJson);
-        return -1;
+        STR_TO_VARSTR(schemaJson, "NULL");
+        mError("mndRetrieveTopic mndAcquireStb null stbName:%s", pTopic->stbName);
+      }else{
+        schemaToJson(pStb->pColumns, pStb->numOfColumns, schemaJson);
+        mndReleaseStb(pMnode, pStb);
       }
-      schemaToJson(pStb->pColumns, pStb->numOfColumns, schemaJson);
-
-      mndReleaseStb(pMnode, pStb);
     }else{
       STR_TO_VARSTR(schemaJson, "NULL");
     }
diff --git a/source/dnode/vnode/src/tq/tqMeta.c b/source/dnode/vnode/src/tq/tqMeta.c
index 0edffd7f056077ddab5e92ef23c6359db20da070..239d65fdb764f0683c304b09f296046bae04e43f 100644
--- a/source/dnode/vnode/src/tq/tqMeta.c
+++ b/source/dnode/vnode/src/tq/tqMeta.c
@@ -37,7 +37,9 @@ int32_t tEncodeSTqHandle(SEncoder* pEncoder, const STqHandle* pHandle) {
     }
   } else if (pHandle->execHandle.subType == TOPIC_SUB_TYPE__TABLE) {
     if (tEncodeI64(pEncoder, pHandle->execHandle.execTb.suid) < 0) return -1;
-    if (tEncodeCStr(pEncoder, pHandle->execHandle.execTb.qmsg) < 0) return -1;
+    if (pHandle->execHandle.execTb.qmsg != NULL){
+      if (tEncodeCStr(pEncoder, pHandle->execHandle.execTb.qmsg) < 0) return -1;
+    }
   }
   tEndEncode(pEncoder);
   return pEncoder->pos;
@@ -65,7 +67,9 @@ int32_t tDecodeSTqHandle(SDecoder* pDecoder, STqHandle* pHandle) {
     }
   } else if (pHandle->execHandle.subType == TOPIC_SUB_TYPE__TABLE) {
     if (tDecodeI64(pDecoder, &pHandle->execHandle.execTb.suid) < 0) return -1;
-    if (tDecodeCStrAlloc(pDecoder, &pHandle->execHandle.execTb.qmsg) < 0) return -1;
+    if (!tDecodeIsEnd(pDecoder)){
+      if (tDecodeCStrAlloc(pDecoder, &pHandle->execHandle.execTb.qmsg) < 0) return -1;
+    }
   }
   tEndDecode(pDecoder);
   return 0;
@@ -339,7 +343,7 @@ int32_t tqMetaRestoreHandle(STQ* pTq) {
     } else if (handle.execHandle.subType == TOPIC_SUB_TYPE__TABLE) {
       handle.pWalReader = walOpenReader(pTq->pVnode->pWal, NULL);
 
-      if(strcmp(handle.execHandle.execTb.qmsg, "") != 0) {
+      if(handle.execHandle.execTb.qmsg != NULL && strcmp(handle.execHandle.execTb.qmsg, "") != 0) {
         if (nodesStringToNode(handle.execHandle.execTb.qmsg, &handle.execHandle.execTb.node) != 0) {
           tqError("nodesStringToNode error in sub stable, since %s", terrstr());
           return -1;