diff --git a/src/client/src/tscAsync.c b/src/client/src/tscAsync.c
index 1e23094ca8d6763639f36c4322ccf1773b885d93..ebcdddffdee3f4be6e70048c2d0e170a9c38e1f2 100644
--- a/src/client/src/tscAsync.c
+++ b/src/client/src/tscAsync.c
@@ -487,7 +487,7 @@ 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 && pTableMetaInfo->pTableMeta != NULL);
-          (*pSql->fp)(pSql->param, NULL, code);
+          (*pSql->fp)(pSql->param, pSql, code);
           return;
         }
         
diff --git a/src/client/src/tscPrepare.c b/src/client/src/tscPrepare.c
index d66e40b20f972b62cbbbb10985443a4aac6b416f..0068b23334c895d2ccb1b37aeda0712e8b29d9c9 100644
--- a/src/client/src/tscPrepare.c
+++ b/src/client/src/tscPrepare.c
@@ -494,7 +494,7 @@ TAOS_STMT* taos_stmt_init(TAOS* taos) {
   tsem_init(&pSql->rspSem, 0, 0);
   pSql->signature     = pSql;
   pSql->pTscObj       = pObj;
-  pSql->pTscObj->pSql = pSql;
+  //pSql->pTscObj->pSql = pSql;
   pSql->maxRetry      = TSDB_MAX_REPLICA_NUM;
 
   pStmt->pSql = pSql;
@@ -515,7 +515,7 @@ int taos_stmt_prepare(TAOS_STMT* stmt, const char* sql, unsigned long length) {
   //doAsyncQuery(pObj, pSql, waitForQueryRsp, taos, sqlstr, sqlLen);
   SSqlCmd *pCmd    = &pSql->cmd;
   SSqlRes *pRes    = &pSql->res;
-  pSql->param      = (void*)pStmt->taos;
+  pSql->param      = (void*)pSql;
   pSql->fp         = waitForQueryRsp;
   pSql->insertType = TSDB_QUERY_TYPE_STMT_INSERT;
   
@@ -613,7 +613,12 @@ int taos_stmt_execute(TAOS_STMT* stmt) {
     } else {
       tfree(pStmt->pSql->sqlstr);
       pStmt->pSql->sqlstr = sql;
-      ret = taos_query(pStmt->taos, pStmt->pSql->sqlstr);
+      SSqlObj* pSql = taos_query((TAOS*)pStmt->taos, pStmt->pSql->sqlstr);
+      if (pSql != NULL) {
+        ret = pSql->res.code;
+      } else {
+        ret = terrno;
+      } 
     }
   }
   return ret;
diff --git a/src/client/src/tscSql.c b/src/client/src/tscSql.c
index 2421dc48db9e143993b7461fd8eda585fb40f4b2..5ff417f7d52ba9980f2c0675d0dd6cb937c96ec2 100644
--- a/src/client/src/tscSql.c
+++ b/src/client/src/tscSql.c
@@ -256,13 +256,7 @@ int taos_query_imp(STscObj *pObj, SSqlObj *pSql) {
 }
 
 void waitForQueryRsp(void *param, TAOS_RES *tres, int code) {
-  assert(param != NULL);
-  SSqlObj *pSql = ((STscObj *)param)->pSql;
-  
-  // valid error code is less than 0
-  if (code < 0) {
-    pSql->res.code = code;
-  }
+  assert(tres != NULL);
   
   SSqlObj *pSql = (SSqlObj *) tres;
   sem_post(&pSql->rspSem);