diff --git a/source/client/src/clientImpl.c b/source/client/src/clientImpl.c
index 7a3f33a999db68c4db949ff69da986376c0f71ca..76c4c1dbcd1ff29d186c17a04f0e43db7aefea4c 100644
--- a/source/client/src/clientImpl.c
+++ b/source/client/src/clientImpl.c
@@ -336,6 +336,10 @@ SRequestObj* execQuery(STscObj* pTscObj, const char* sql, int sqlLen) {
         }
       }
     }
+
+    if (!quit) {
+      destroyRequest(pRequest);
+    }
   }
 
   if (code) {
diff --git a/source/libs/catalog/src/catalog.c b/source/libs/catalog/src/catalog.c
index 8d5fa24fa2427feec4045062611412aa8d32aa57..24358f2c06cc055d51257f4b8d25da564c12fe74 100644
--- a/source/libs/catalog/src/catalog.c
+++ b/source/libs/catalog/src/catalog.c
@@ -1452,8 +1452,12 @@ int32_t ctgGetAddDBCache(SCatalog* pCtg, const char *dbFName, uint64_t dbId, SCt
 int32_t ctgUpdateDBVgInfo(SCatalog* pCtg, const char* dbFName, uint64_t dbId, SDBVgInfo** pDbInfo) {
   int32_t code = 0;
   SDBVgInfo* dbInfo = *pDbInfo;
+
+  if (NULL == dbInfo->vgHash) {
+    return TSDB_CODE_SUCCESS;
+  }
   
-  if (NULL == dbInfo->vgHash || dbInfo->vgVersion < 0 || taosHashGetSize(dbInfo->vgHash) <= 0) {
+  if (dbInfo->vgVersion < 0 || taosHashGetSize(dbInfo->vgHash) <= 0) {
     ctgError("invalid db vgInfo, dbFName:%s, vgHash:%p, vgVersion:%d, vgHashSize:%d", 
       dbFName, dbInfo->vgHash, dbInfo->vgVersion, taosHashGetSize(dbInfo->vgHash));
     CTG_ERR_RET(TSDB_CODE_CTG_MEM_ERROR);
@@ -2588,7 +2592,7 @@ int32_t catalogUpdateSTableMeta(SCatalog* pCtg, STableMetaRsp *rspMsg) {
   
   CTG_ERR_JRET(queryCreateTableMetaFromMsg(rspMsg, true, &output->tbMeta));
 
-  CTG_ERR_JRET(ctgPushUpdateTblMsgInQueue(pCtg, output));
+  CTG_ERR_JRET(ctgPushUpdateTblMsgInQueue(pCtg, output, false));
 
   CTG_API_LEAVE(code);
   
diff --git a/source/libs/qcom/src/querymsg.c b/source/libs/qcom/src/querymsg.c
index 37e8b7302eb16de21a0813250ad68a559d1e8420..8dd9f33c8a47104adf774d9a7b08b51d4f3f2913 100644
--- a/source/libs/qcom/src/querymsg.c
+++ b/source/libs/qcom/src/querymsg.c
@@ -27,6 +27,7 @@ int32_t (*queryProcessMsgRsp[TDMT_MAX])(void *output, char *msg, int32_t msgSize
 int32_t queryBuildUseDbOutput(SUseDbOutput *pOut, SUseDbRsp *usedbRsp) {
   memcpy(pOut->db, usedbRsp->db, TSDB_DB_FNAME_LEN);
   pOut->dbId = usedbRsp->uid;
+
   pOut->dbVgroup = calloc(1, sizeof(SDBVgInfo));
   if (NULL == pOut->dbVgroup) {
     return TSDB_CODE_TSC_OUT_OF_MEMORY;
@@ -34,6 +35,11 @@ int32_t queryBuildUseDbOutput(SUseDbOutput *pOut, SUseDbRsp *usedbRsp) {
 
   pOut->dbVgroup->vgVersion = usedbRsp->vgVersion;
   pOut->dbVgroup->hashMethod = usedbRsp->hashMethod;
+
+  if (usedbRsp->vgNum <= 0) {
+    return TSDB_CODE_SUCCESS;
+  }
+  
   pOut->dbVgroup->vgHash =
       taosHashInit(usedbRsp->vgNum, taosGetDefaultHashFunction(TSDB_DATA_TYPE_INT), true, HASH_ENTRY_LOCK);
   if (NULL == pOut->dbVgroup->vgHash) {