diff --git a/src/client/src/tscAsync.c b/src/client/src/tscAsync.c
index 602b8cc430d915d133fd0761185b1671d6a17dd0..23071fccfacf5c9f0de680555a4fd944e6106f0b 100644
--- a/src/client/src/tscAsync.c
+++ b/src/client/src/tscAsync.c
@@ -451,7 +451,11 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
       STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
       if (pTableMetaInfo->pTableMeta == NULL){
         code = tscGetTableMeta(pSql, pTableMetaInfo);
-        assert(code == TSDB_CODE_SUCCESS);      
+        if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
+          return;
+        } else {
+          assert(code == TSDB_CODE_SUCCESS);      
+        }
       }
       
       assert((tscGetNumOfTags(pTableMetaInfo->pTableMeta) != 0) && pTableMetaInfo->vgroupIndex >= 0 && pSql->param != NULL);
@@ -473,7 +477,11 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
 
         STableMetaInfo* pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, 0);
         code = tscGetTableMeta(pSql, pTableMetaInfo);
-        assert(code == TSDB_CODE_SUCCESS);
+        if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
+          return;
+        } else {
+          assert(code == TSDB_CODE_SUCCESS);      
+        }
 
         // if failed to process sql, go to error handler
         if ((code = tscProcessSql(pSql)) == TSDB_CODE_SUCCESS) {
@@ -483,7 +491,6 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
 //          // 1. table uid, 2. ip address
 //          code = tscSendMsgToServer(pSql);
 //          if (code == TSDB_CODE_SUCCESS) return;
-//        }
       } else {
         tscTrace("%p continue parse sql after get table meta", pSql);
 
@@ -491,8 +498,11 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
         if (TSDB_QUERY_HAS_TYPE(pQueryInfo->type, TSDB_QUERY_TYPE_STMT_INSERT)) {
           STableMetaInfo* pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, 0);
           code = tscGetTableMeta(pSql, pTableMetaInfo);
-          assert(code == TSDB_CODE_SUCCESS && pTableMetaInfo->pTableMeta != NULL);
-
+          if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
+            return;
+          } else {
+            assert(code == TSDB_CODE_SUCCESS);      
+          }
           (*pSql->fp)(pSql->param, pSql, code);
           return;
         }
diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 372e81d7371debe904ac7ad1e6a9caecb54ccb28..5db50b3936f430c707d0f77db8e6f4542b0c7eb7 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -543,7 +543,7 @@ int32_t tscToSQLCmd(SSqlObj* pSql, struct SSqlInfo* pInfo) {
       return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), "not support sql expression");
   }
 
-  pSql->cmd.parseFinished = true;
+  pSql->cmd.parseFinished = 1;
   return tscBuildMsg[pCmd->command](pSql, pInfo);
 }
 
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index 2701d2b572d9f893b265c6cc1262ee08d4bbaf6f..215b544639de0758ad02bfcd6d9faebe41b1912e 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -396,12 +396,14 @@ void tscPartiallyFreeSqlObj(SSqlObj* pSql) {
   if (pObj->signature == pObj) {
     pthread_mutex_lock(&pObj->mutex);
     tfree(pSql->sqlstr);
+    pSql->sqlstr = NULL;
     pthread_mutex_unlock(&pObj->mutex);
   }
   
   tscFreeSqlResult(pSql);
   
   tfree(pSql->pSubs);
+  pSql->pSubs = NULL;
   pSql->freed = 0;
   pSql->numOfSubs = 0;