diff --git a/src/client/src/tscPrepare.c b/src/client/src/tscPrepare.c
index f199a57987..3f12bc811b 100644
--- a/src/client/src/tscPrepare.c
+++ b/src/client/src/tscPrepare.c
@@ -78,6 +78,16 @@ typedef struct STscStmt {
   SNormalStmt normal;
 } STscStmt;
 
+#define STMT_RET(c) do {          \
+  int32_t _code = c;               \
+  if (pStmt && pStmt->pSql) { pStmt->pSql->res.code = _code; } else {terrno = _code;}   \
+  return _code;             \
+} while (0)
+
+static int32_t invalidOperationMsg(char* dstBuffer, const char* errMsg) {
+  return tscInvalidOperationMsg(dstBuffer, errMsg, NULL);
+}
+
 static int normalStmtAddPart(SNormalStmt* stmt, bool isParam, char* str, uint32_t len) {
   uint16_t size = stmt->numParts + 1;
   if (size > stmt->sizeParts) {
@@ -163,8 +173,8 @@ static int normalStmtBindParam(STscStmt* stmt, TAOS_BIND* bind) {
         break;
 
       default:
-        tscDebug("0x%"PRIx64" bind column%d: type mismatch or invalid", stmt->pSql->self, i);
-        return TSDB_CODE_TSC_INVALID_VALUE;
+        tscError("0x%"PRIx64" bind column%d: type mismatch or invalid", stmt->pSql->self, i);
+        return invalidOperationMsg(tscGetErrorMsgPayload(&stmt->pSql->cmd), "bind type mismatch or invalid");
     }
   }
 
@@ -727,6 +737,7 @@ static int doBindParam(STableDataBlocks* pBlock, char* data, SParamInfo* param,
 #endif
 
   if (bind->buffer_type != param->type) {
+    tscError("column type mismatch");
     return TSDB_CODE_TSC_INVALID_VALUE;
   }
 
@@ -754,6 +765,7 @@ static int doBindParam(STableDataBlocks* pBlock, char* data, SParamInfo* param,
 
     case TSDB_DATA_TYPE_BINARY:
       if ((*bind->length) > (uintptr_t)param->bytes) {
+        tscError("column length is too big");
         return TSDB_CODE_TSC_INVALID_VALUE;
       }
       size = (short)*bind->length;
@@ -763,6 +775,7 @@ static int doBindParam(STableDataBlocks* pBlock, char* data, SParamInfo* param,
     case TSDB_DATA_TYPE_NCHAR: {
       int32_t output = 0;
       if (!taosMbsToUcs4(bind->buffer, *bind->length, varDataVal(data + param->offset), param->bytes - VARSTR_HEADER_SIZE, &output)) {
+        tscError("convert nchar failed");
         return TSDB_CODE_TSC_INVALID_VALUE;
       }
       varDataSetLen(data + param->offset, output);
@@ -787,6 +800,7 @@ static int doBindParam(STableDataBlocks* pBlock, char* data, SParamInfo* param,
 
 static int doBindBatchParam(STableDataBlocks* pBlock, SParamInfo* param, TAOS_MULTI_BIND* bind, int32_t rowNum) {
   if (bind->buffer_type != param->type || !isValidDataType(param->type)) {
+    tscError("column mismatch or invalid");
     return TSDB_CODE_TSC_INVALID_VALUE;
   }
 
@@ -892,8 +906,8 @@ static int insertStmtBindParam(STscStmt* stmt, TAOS_BIND* bind) {
 
     int code = doBindParam(pBlock, data, param, &bind[param->idx], 1);
     if (code != TSDB_CODE_SUCCESS) {
-      tscDebug("0x%"PRIx64" bind column %d: type mismatch or invalid", pStmt->pSql->self, param->idx);
-      return code;
+      tscDebug("0x%"PRIx64" bind column %d: type mismatch or invalid", pStmt->pSql->self, param->idx);      
+      return invalidOperationMsg(tscGetErrorMsgPayload(&stmt->pSql->cmd), "bind column type mismatch or invalid");
     }
   }
 
@@ -957,13 +971,13 @@ static int insertStmtBindParamBatch(STscStmt* stmt, TAOS_MULTI_BIND* bind, int c
       SParamInfo* param = &pBlock->params[j];
       if (bind[param->idx].num != rowNum) {
         tscError("0x%"PRIx64" param %d: num[%d:%d] not match", pStmt->pSql->self, param->idx, rowNum, bind[param->idx].num);
-        return TSDB_CODE_TSC_INVALID_VALUE;
+        return invalidOperationMsg(tscGetErrorMsgPayload(&stmt->pSql->cmd), "bind row num mismatch");
       }
 
       int code = doBindBatchParam(pBlock, param, &bind[param->idx], pCmd->batchSize);
       if (code != TSDB_CODE_SUCCESS) {
         tscError("0x%"PRIx64" bind column %d: type mismatch or invalid", pStmt->pSql->self, param->idx);
-        return code;
+        return invalidOperationMsg(tscGetErrorMsgPayload(&stmt->pSql->cmd), "bind column type mismatch or invalid");
       }
     }
 
@@ -974,7 +988,7 @@ static int insertStmtBindParamBatch(STscStmt* stmt, TAOS_MULTI_BIND* bind, int c
     int code = doBindBatchParam(pBlock, param, bind, pCmd->batchSize);
     if (code != TSDB_CODE_SUCCESS) {
       tscError("0x%"PRIx64" bind column %d: type mismatch or invalid", pStmt->pSql->self, param->idx);
-      return code;
+      return invalidOperationMsg(tscGetErrorMsgPayload(&stmt->pSql->cmd), "bind column type mismatch or invalid");
     }
 
     if (colIdx == (pBlock->numOfParams - 1)) {
@@ -993,7 +1007,7 @@ static int insertStmtUpdateBatch(STscStmt* stmt) {
 
   if (pCmd->batchSize > INT16_MAX) {
     tscError("too many record:%d", pCmd->batchSize);
-    return TSDB_CODE_TSC_APP_ERROR;
+    return invalidOperationMsg(tscGetErrorMsgPayload(&stmt->pSql->cmd), "too many records");
   }
 
   if (taosHashGetSize(pCmd->insertParam.pTableBlockHashList) == 0) {
@@ -1057,7 +1071,8 @@ static int insertStmtReset(STscStmt* pStmt) {
 static int insertStmtExecute(STscStmt* stmt) {
   SSqlCmd* pCmd = &stmt->pSql->cmd;
   if (pCmd->batchSize == 0) {
-    return TSDB_CODE_TSC_INVALID_VALUE;
+    tscError("no records bind");
+    return invalidOperationMsg(tscGetErrorMsgPayload(&stmt->pSql->cmd), "no records bind");
   }
 
   if (taosHashGetSize(pCmd->insertParam.pTableBlockHashList) == 0) {
@@ -1174,7 +1189,7 @@ static int insertBatchStmtExecute(STscStmt* pStmt) {
 
   if(pStmt->mtb.nameSet == false) {
     tscError("0x%"PRIx64" no table name set", pStmt->pSql->self);
-    return TSDB_CODE_TSC_APP_ERROR;
+    return invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "no table name set");
   }
 
   pStmt->pSql->retry = pStmt->pSql->maxRetry + 1;  //no retry
@@ -1215,7 +1230,8 @@ int stmtParseInsertTbTags(SSqlObj* pSql, STscStmt* pStmt) {
   int32_t index = 0;
   SStrToken sToken = tStrGetToken(pCmd->insertParam.sql, &index, false);
   if (sToken.n == 0) {
-    return TSDB_CODE_TSC_INVALID_OPERATION;
+    tscError("table is is expected, sql:%s", pCmd->insertParam.sql);
+    return tscSQLSyntaxErrMsg(pCmd->payload, "table name is expected", pCmd->insertParam.sql);
   }
 
   if (sToken.n == 1 && sToken.type == TK_QUESTION) {
@@ -1237,24 +1253,28 @@ int stmtParseInsertTbTags(SSqlObj* pSql, STscStmt* pStmt) {
       return TSDB_CODE_SUCCESS;
     }
 
-    if (sToken.n <= 0 || sToken.type != TK_USING) {
-      return tscSQLSyntaxErrMsg(pCmd->payload, "keywords USING is expected", sToken.z);
+    if (sToken.n <= 0 || sToken.type != TK_USING) {      
+      tscError("keywords USING is expected, sql:%s", pCmd->insertParam.sql);
+      return tscSQLSyntaxErrMsg(pCmd->payload, "keywords USING is expected", sToken.z ? sToken.z : pCmd->insertParam.sql);
     }
 
     sToken = tStrGetToken(pCmd->insertParam.sql, &index, false);
     if (sToken.n <= 0 || ((sToken.type != TK_ID) && (sToken.type != TK_STRING))) {
-      return tscSQLSyntaxErrMsg(pCmd->payload, "invalid token", sToken.z);
+      tscError("invalid token, sql:%s", pCmd->insertParam.sql);
+      return tscSQLSyntaxErrMsg(pCmd->payload, "invalid token", sToken.z ? sToken.z : pCmd->insertParam.sql);
     }
     pStmt->mtb.stbname = sToken;
 
     sToken = tStrGetToken(pCmd->insertParam.sql, &index, false);
     if (sToken.n <= 0 || sToken.type != TK_TAGS) {
-      return tscSQLSyntaxErrMsg(pCmd->payload, "keyword TAGS expected", sToken.z);
+      tscError("keyword TAGS expected, sql:%s", pCmd->insertParam.sql);
+      return tscSQLSyntaxErrMsg(pCmd->payload, "keyword TAGS expected", sToken.z ? sToken.z : pCmd->insertParam.sql);
     }
 
     sToken = tStrGetToken(pCmd->insertParam.sql, &index, false);
     if (sToken.n <= 0 || sToken.type != TK_LP) {
-      return tscSQLSyntaxErrMsg(pCmd->payload, ") expected", sToken.z);
+      tscError("( expected, sql:%s", pCmd->insertParam.sql);
+      return tscSQLSyntaxErrMsg(pCmd->payload, "( expected", sToken.z ? sToken.z : pCmd->insertParam.sql);
     }
 
     pStmt->mtb.tags = taosArrayInit(4, sizeof(SStrToken));
@@ -1264,7 +1284,8 @@ int stmtParseInsertTbTags(SSqlObj* pSql, STscStmt* pStmt) {
     while (loopCont) {
       sToken = tStrGetToken(pCmd->insertParam.sql, &index, false);
       if (sToken.n <= 0) {
-        return TSDB_CODE_TSC_INVALID_OPERATION;
+        tscError("unexpected sql end, sql:%s", pCmd->insertParam.sql);
+        return tscSQLSyntaxErrMsg(pCmd->payload, "unexpected sql end", pCmd->insertParam.sql);
       }
 
       switch (sToken.type) {
@@ -1272,7 +1293,8 @@ int stmtParseInsertTbTags(SSqlObj* pSql, STscStmt* pStmt) {
           loopCont = 0;
           break;
         case TK_VALUES:
-          return TSDB_CODE_TSC_INVALID_OPERATION;
+          tscError("unexpected token values, sql:%s", pCmd->insertParam.sql);
+          return tscSQLSyntaxErrMsg(pCmd->payload, "unexpected token", sToken.z);
         case TK_QUESTION:
           pStmt->mtb.tagSet = false; //continue
         default:
@@ -1282,12 +1304,14 @@ int stmtParseInsertTbTags(SSqlObj* pSql, STscStmt* pStmt) {
     }
 
     if (taosArrayGetSize(pStmt->mtb.tags) <= 0) {
-      return TSDB_CODE_TSC_INVALID_OPERATION;
+      tscError("no tags, sql:%s", pCmd->insertParam.sql);
+      return tscSQLSyntaxErrMsg(pCmd->payload, "no tags", pCmd->insertParam.sql);
     }
 
     sToken = tStrGetToken(pCmd->insertParam.sql, &index, false);
     if (sToken.n <= 0 || (sToken.type != TK_VALUES && sToken.type != TK_LP)) {
-      return TSDB_CODE_TSC_INVALID_OPERATION;
+      tscError("sql error, sql:%s", pCmd->insertParam.sql);
+      return tscSQLSyntaxErrMsg(pCmd->payload, "sql error", sToken.z ? sToken.z : pCmd->insertParam.sql);
     }
 
     pStmt->mtb.values = sToken;
@@ -1329,8 +1353,8 @@ int stmtGenInsertStatement(SSqlObj* pSql, STscStmt* pStmt, const char* name, TAO
         } else {
           if (tags[j].buffer == NULL) {
             free(str);
-            tscError("empty");
-            return TSDB_CODE_TSC_APP_ERROR;
+            tscError("empty tag value in params");
+            return invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "empty tag value in params");
           }
 
           ret = converToStr(str + len, tags[j].buffer_type, tags[j].buffer, tags[j].length ? (int32_t)*tags[j].length : -1, &l);
@@ -1387,13 +1411,15 @@ int stmtGenInsertStatement(SSqlObj* pSql, STscStmt* pStmt, const char* name, TAO
 
 TAOS_STMT* taos_stmt_init(TAOS* taos) {
   STscObj* pObj = (STscObj*)taos;
+  STscStmt* pStmt = NULL;
+  
   if (pObj == NULL || pObj->signature != pObj) {
     terrno = TSDB_CODE_TSC_DISCONNECTED;
     tscError("connection disconnected");
     return NULL;
   }
 
-  STscStmt* pStmt = calloc(1, sizeof(STscStmt));
+  pStmt = calloc(1, sizeof(STscStmt));
   if (pStmt == NULL) {
     terrno = TSDB_CODE_TSC_OUT_OF_MEMORY;
     tscError("failed to allocate memory for statement");
@@ -1410,6 +1436,14 @@ TAOS_STMT* taos_stmt_init(TAOS* taos) {
     return NULL;
   }
 
+  if (TSDB_CODE_SUCCESS != tscAllocPayload(&pSql->cmd, TSDB_DEFAULT_PAYLOAD_SIZE)) {
+    free(pSql);
+    free(pStmt);
+    terrno = TSDB_CODE_TSC_OUT_OF_MEMORY;
+    tscError("failed to malloc payload buffer");
+    return NULL;
+  }
+
   tsem_init(&pSql->rspSem, 0, 0);
   pSql->signature = pSql;
   pSql->pTscObj   = pObj;
@@ -1425,13 +1459,12 @@ int taos_stmt_prepare(TAOS_STMT* stmt, const char* sql, unsigned long length) {
   STscStmt* pStmt = (STscStmt*)stmt;
 
   if (stmt == NULL || pStmt->taos == NULL || pStmt->pSql == NULL) {
-    terrno = TSDB_CODE_TSC_DISCONNECTED;
-    return TSDB_CODE_TSC_DISCONNECTED;
+    STMT_RET(TSDB_CODE_TSC_DISCONNECTED);
   }
 
   if (pStmt->last != STMT_INIT) {
     tscError("prepare status error, last:%d", pStmt->last);
-    return TSDB_CODE_TSC_APP_ERROR;
+    STMT_RET(invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "prepare status error"));
   }
 
   pStmt->last = STMT_PREPARE;
@@ -1447,17 +1480,11 @@ int taos_stmt_prepare(TAOS_STMT* stmt, const char* sql, unsigned long length) {
   
   pCmd->insertParam.insertType = TSDB_QUERY_TYPE_STMT_INSERT;
 
-  if (TSDB_CODE_SUCCESS != tscAllocPayload(pCmd, TSDB_DEFAULT_PAYLOAD_SIZE)) {
-    tscError("%p failed to malloc payload buffer", pSql);
-    return TSDB_CODE_TSC_OUT_OF_MEMORY;
-  }
-
   pSql->sqlstr = realloc(pSql->sqlstr, sqlLen + 1);
 
   if (pSql->sqlstr == NULL) {
     tscError("%p failed to malloc sql string buffer", pSql);
-    free(pCmd->payload);
-    return TSDB_CODE_TSC_OUT_OF_MEMORY;
+    STMT_RET(TSDB_CODE_TSC_OUT_OF_MEMORY);
   }
 
   pRes->qId = 0;
@@ -1476,11 +1503,11 @@ int taos_stmt_prepare(TAOS_STMT* stmt, const char* sql, unsigned long length) {
 
     int32_t ret = stmtParseInsertTbTags(pSql, pStmt);
     if (ret != TSDB_CODE_SUCCESS) {
-      return ret;
+      STMT_RET(ret);
     }
 
     if (pStmt->multiTbInsert) {
-      return TSDB_CODE_SUCCESS;
+      STMT_RET(TSDB_CODE_SUCCESS);
     }
 
     memset(&pStmt->mtb, 0, sizeof(pStmt->mtb));
@@ -1489,14 +1516,14 @@ int taos_stmt_prepare(TAOS_STMT* stmt, const char* sql, unsigned long length) {
     if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
       // wait for the callback function to post the semaphore
       tsem_wait(&pSql->rspSem);
-      return pSql->res.code;
+      STMT_RET(pSql->res.code);
     }
 
-    return code;
+    STMT_RET(code);
   }
 
   pStmt->isInsert = false;
-  return normalStmtPrepare(pStmt);
+  STMT_RET(normalStmtPrepare(pStmt));
 }
 
 int taos_stmt_set_tbname_tags(TAOS_STMT* stmt, const char* name, TAOS_BIND* tags) {
@@ -1505,25 +1532,22 @@ int taos_stmt_set_tbname_tags(TAOS_STMT* stmt, const char* name, TAOS_BIND* tags
   SSqlCmd* pCmd = &pSql->cmd;
 
   if (stmt == NULL || pStmt->pSql == NULL || pStmt->taos == NULL) {
-    terrno = TSDB_CODE_TSC_DISCONNECTED;
-    return TSDB_CODE_TSC_DISCONNECTED;
+    STMT_RET(TSDB_CODE_TSC_DISCONNECTED);
   }
 
   if (name == NULL) {
-    terrno = TSDB_CODE_TSC_APP_ERROR;
     tscError("0x%"PRIx64" name is NULL", pSql->self);
-    return TSDB_CODE_TSC_APP_ERROR;
+    STMT_RET(invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "name is NULL"));
   }
 
   if (pStmt->multiTbInsert == false || !tscIsInsertData(pSql->sqlstr)) {
-    terrno = TSDB_CODE_TSC_APP_ERROR;
-    tscError("0x%"PRIx64" not multi table insert", pSql->self);
-    return TSDB_CODE_TSC_APP_ERROR;
+    tscError("0x%"PRIx64" not multiple table insert", pSql->self);
+    STMT_RET(invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "not multiple table insert"));
   }
 
   if (pStmt->last == STMT_INIT || pStmt->last == STMT_BIND || pStmt->last == STMT_BIND_COL) {
-    tscError("0x%"PRIx64" settbname status error, last:%d", pSql->self, pStmt->last);
-    return TSDB_CODE_TSC_APP_ERROR;
+    tscError("0x%"PRIx64" set_tbname_tags status error, last:%d", pSql->self, pStmt->last);
+    STMT_RET(invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "set_tbname_tags status error"));
   }
 
   pStmt->last = STMT_SETTBNAME;
@@ -1535,7 +1559,7 @@ int taos_stmt_set_tbname_tags(TAOS_STMT* stmt, const char* name, TAOS_BIND* tags
     STableDataBlocks** t1 = (STableDataBlocks**)taosHashGet(pStmt->mtb.pTableBlockHashList, (const char*)&pStmt->mtb.currentUid, sizeof(pStmt->mtb.currentUid));
     if (t1 == NULL) {
       tscError("0x%"PRIx64" no table data block in hash list, uid:%" PRId64 , pSql->self, pStmt->mtb.currentUid);
-      return TSDB_CODE_TSC_APP_ERROR;
+      STMT_RET(TSDB_CODE_TSC_APP_ERROR);
     }
 
     SSubmitBlk* pBlk = (SSubmitBlk*) (*t1)->pData;
@@ -1544,7 +1568,7 @@ int taos_stmt_set_tbname_tags(TAOS_STMT* stmt, const char* name, TAOS_BIND* tags
     taosHashPut(pCmd->insertParam.pTableBlockHashList, (void *)&pStmt->mtb.currentUid, sizeof(pStmt->mtb.currentUid), (void*)t1, POINTER_BYTES);
 
     tscDebug("0x%"PRIx64" table:%s is already prepared, uid:%" PRIu64, pSql->self, name, pStmt->mtb.currentUid);
-    return TSDB_CODE_SUCCESS;
+    STMT_RET(TSDB_CODE_SUCCESS);
   }
 
   if (pStmt->mtb.tagSet) {
@@ -1552,12 +1576,12 @@ int taos_stmt_set_tbname_tags(TAOS_STMT* stmt, const char* name, TAOS_BIND* tags
   } else {
     if (tags == NULL) {
       tscError("No tags set");
-      return TSDB_CODE_TSC_APP_ERROR;
+      STMT_RET(invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "no tags set"));
     }
 
     int32_t ret = stmtGenInsertStatement(pSql, pStmt, name, tags);
     if (ret != TSDB_CODE_SUCCESS) {
-      return ret;
+      STMT_RET(ret);
     }
   }
 
@@ -1591,7 +1615,7 @@ int taos_stmt_set_tbname_tags(TAOS_STMT* stmt, const char* name, TAOS_BIND* tags
     code = tscGetDataBlockFromList(pCmd->insertParam.pTableBlockHashList, pTableMeta->id.uid, TSDB_PAYLOAD_SIZE, sizeof(SSubmitBlk),
                               pTableMeta->tableInfo.rowSize, &pTableMetaInfo->name, pTableMeta, &pBlock, NULL);
     if (code != TSDB_CODE_SUCCESS) {
-      return code;
+      STMT_RET(code);
     }
 
     SSubmitBlk* blk = (SSubmitBlk*)pBlock->pData;
@@ -1606,7 +1630,7 @@ int taos_stmt_set_tbname_tags(TAOS_STMT* stmt, const char* name, TAOS_BIND* tags
     tscDebug("0x%"PRIx64" table:%s is prepared, uid:%" PRIx64, pSql->self, name, pStmt->mtb.currentUid);
   }
 
-  return code;
+  STMT_RET(code);
 }
 
 
@@ -1639,35 +1663,34 @@ int taos_stmt_close(TAOS_STMT* stmt) {
   }
 
   taos_free_result(pStmt->pSql);
-  free(pStmt);
-  return TSDB_CODE_SUCCESS;
+  tfree(pStmt);
+  STMT_RET(TSDB_CODE_SUCCESS);
 }
 
 int taos_stmt_bind_param(TAOS_STMT* stmt, TAOS_BIND* bind) {
   STscStmt* pStmt = (STscStmt*)stmt;
   if (stmt == NULL || pStmt->pSql == NULL || pStmt->taos == NULL) {
-    terrno = TSDB_CODE_TSC_DISCONNECTED;
-    return TSDB_CODE_TSC_DISCONNECTED;
+    STMT_RET(TSDB_CODE_TSC_DISCONNECTED);
   }
 
   if (pStmt->isInsert) {
     if (pStmt->multiTbInsert) {
       if (pStmt->last != STMT_SETTBNAME && pStmt->last != STMT_ADD_BATCH) {
         tscError("0x%"PRIx64" bind param status error, last:%d", pStmt->pSql->self, pStmt->last);
-        return TSDB_CODE_TSC_APP_ERROR;
+        STMT_RET(invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "bind param status error"));
       }
     } else {
       if (pStmt->last != STMT_PREPARE && pStmt->last != STMT_ADD_BATCH && pStmt->last != STMT_EXECUTE) {
         tscError("0x%"PRIx64" bind param status error, last:%d", pStmt->pSql->self, pStmt->last);
-        return TSDB_CODE_TSC_APP_ERROR;
+        STMT_RET(invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "bind param status error"));
       }
     }
 
     pStmt->last = STMT_BIND;
 
-    return insertStmtBindParam(pStmt, bind);
+    STMT_RET(insertStmtBindParam(pStmt, bind));
   } else {
-    return normalStmtBindParam(pStmt, bind);
+    STMT_RET(normalStmtBindParam(pStmt, bind));
   }
 }
 
@@ -1676,69 +1699,67 @@ int taos_stmt_bind_param_batch(TAOS_STMT* stmt, TAOS_MULTI_BIND* bind) {
   STscStmt* pStmt = (STscStmt*)stmt;
 
   if (stmt == NULL || pStmt->pSql == NULL || pStmt->taos == NULL) {
-    terrno = TSDB_CODE_TSC_DISCONNECTED;
-    return TSDB_CODE_TSC_DISCONNECTED;
+    STMT_RET(TSDB_CODE_TSC_DISCONNECTED);
   }
 
   if (bind == NULL || bind->num <= 0 || bind->num > INT16_MAX) {
     tscError("0x%"PRIx64" invalid parameter", pStmt->pSql->self);
-    return TSDB_CODE_TSC_APP_ERROR;
+    STMT_RET(invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "invalid bind param"));
   }
 
   if (!pStmt->isInsert) {
     tscError("0x%"PRIx64" not or invalid batch insert", pStmt->pSql->self);
-    return TSDB_CODE_TSC_APP_ERROR;
+    STMT_RET(invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "not or invalid batch insert"));
   }
 
   if (pStmt->multiTbInsert) {
     if (pStmt->last != STMT_SETTBNAME && pStmt->last != STMT_ADD_BATCH) {
       tscError("0x%"PRIx64" bind param status error, last:%d", pStmt->pSql->self, pStmt->last);
-      return TSDB_CODE_TSC_APP_ERROR;
+      STMT_RET(invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "bind param status error"));
     }
   } else {
     if (pStmt->last != STMT_PREPARE && pStmt->last != STMT_ADD_BATCH && pStmt->last != STMT_EXECUTE) {
       tscError("0x%"PRIx64" bind param status error, last:%d", pStmt->pSql->self, pStmt->last);
-      return TSDB_CODE_TSC_APP_ERROR;
+      STMT_RET(invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "bind param status error"));
     }
   }
 
   pStmt->last = STMT_BIND;
 
-  return insertStmtBindParamBatch(pStmt, bind, -1);
+  STMT_RET(insertStmtBindParamBatch(pStmt, bind, -1));
 }
 
 int taos_stmt_bind_single_param_batch(TAOS_STMT* stmt, TAOS_MULTI_BIND* bind, int colIdx) {
   STscStmt* pStmt = (STscStmt*)stmt;
   if (stmt == NULL || pStmt->pSql == NULL || pStmt->taos == NULL) {
-    terrno = TSDB_CODE_TSC_DISCONNECTED;
-    return TSDB_CODE_TSC_DISCONNECTED;
+    STMT_RET(TSDB_CODE_TSC_DISCONNECTED);
   }
 
   if (bind == NULL || bind->num <= 0 || bind->num > INT16_MAX) {
     tscError("0x%"PRIx64" invalid parameter", pStmt->pSql->self);
-    return TSDB_CODE_TSC_APP_ERROR;
+    STMT_RET(invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "invalid bind param"));
   }
 
   if (!pStmt->isInsert) {
     tscError("0x%"PRIx64" not or invalid batch insert", pStmt->pSql->self);
-    return TSDB_CODE_TSC_APP_ERROR;
+    STMT_RET(invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "not or invalid batch insert"));
   }
 
   if (pStmt->multiTbInsert) {
     if (pStmt->last != STMT_SETTBNAME && pStmt->last != STMT_ADD_BATCH && pStmt->last != STMT_BIND_COL) {
       tscError("0x%"PRIx64" bind param status error, last:%d", pStmt->pSql->self, pStmt->last);
-      return TSDB_CODE_TSC_APP_ERROR;
+      STMT_RET(invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "bind param status error"));
     }
   } else {
     if (pStmt->last != STMT_PREPARE && pStmt->last != STMT_ADD_BATCH && pStmt->last != STMT_BIND_COL && pStmt->last != STMT_EXECUTE) {
       tscError("0x%"PRIx64" bind param status error, last:%d", pStmt->pSql->self, pStmt->last);
-      return TSDB_CODE_TSC_APP_ERROR;
+      STMT_RET(invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "bind param status error"));
     }
   }
 
   pStmt->last = STMT_BIND_COL;
 
-  return insertStmtBindParamBatch(pStmt, bind, colIdx);
+  STMT_RET(insertStmtBindParamBatch(pStmt, bind, colIdx));
 }
 
 
@@ -1746,44 +1767,42 @@ int taos_stmt_bind_single_param_batch(TAOS_STMT* stmt, TAOS_MULTI_BIND* bind, in
 int taos_stmt_add_batch(TAOS_STMT* stmt) {
   STscStmt* pStmt = (STscStmt*)stmt;
   if (stmt == NULL || pStmt->pSql == NULL || pStmt->taos == NULL) {
-    terrno = TSDB_CODE_TSC_DISCONNECTED;
-    return TSDB_CODE_TSC_DISCONNECTED;
+    STMT_RET(TSDB_CODE_TSC_DISCONNECTED);
   }
 
   if (pStmt->isInsert) {
     if (pStmt->last != STMT_BIND && pStmt->last != STMT_BIND_COL) {
       tscError("0x%"PRIx64" add batch status error, last:%d", pStmt->pSql->self, pStmt->last);
-      return TSDB_CODE_TSC_APP_ERROR;
+      STMT_RET(invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "add batch status error"));
     }
 
     pStmt->last = STMT_ADD_BATCH;
 
-    return insertStmtAddBatch(pStmt);
+    STMT_RET(insertStmtAddBatch(pStmt));
   }
 
-  return TSDB_CODE_COM_OPS_NOT_SUPPORT;
+  STMT_RET(TSDB_CODE_COM_OPS_NOT_SUPPORT);
 }
 
 int taos_stmt_reset(TAOS_STMT* stmt) {
   STscStmt* pStmt = (STscStmt*)stmt;
   if (pStmt->isInsert) {
-    return insertStmtReset(pStmt);
+    STMT_RET(insertStmtReset(pStmt));
   }
-  return TSDB_CODE_SUCCESS;
+  STMT_RET(TSDB_CODE_SUCCESS);
 }
 
 int taos_stmt_execute(TAOS_STMT* stmt) {
   int ret = 0;
   STscStmt* pStmt = (STscStmt*)stmt;
   if (stmt == NULL || pStmt->pSql == NULL || pStmt->taos == NULL) {
-    terrno = TSDB_CODE_TSC_DISCONNECTED;
-    return TSDB_CODE_TSC_DISCONNECTED;
+    STMT_RET(TSDB_CODE_TSC_DISCONNECTED);
   }
 
   if (pStmt->isInsert) {
     if (pStmt->last != STMT_ADD_BATCH) {
       tscError("0x%"PRIx64" exec status error, last:%d", pStmt->pSql->self, pStmt->last);
-      return TSDB_CODE_TSC_APP_ERROR;
+      STMT_RET(invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "exec status error"));
     }
 
     pStmt->last = STMT_EXECUTE;
@@ -1809,7 +1828,7 @@ int taos_stmt_execute(TAOS_STMT* stmt) {
     }
   }
 
-  return ret;
+  STMT_RET(ret);
 }
 
 TAOS_RES *taos_stmt_use_result(TAOS_STMT* stmt) {
@@ -1833,32 +1852,30 @@ int taos_stmt_is_insert(TAOS_STMT *stmt, int *insert) {
   STscStmt* pStmt = (STscStmt*)stmt;
 
   if (stmt == NULL || pStmt->taos == NULL || pStmt->pSql == NULL) {
-    terrno = TSDB_CODE_TSC_DISCONNECTED;
-    return TSDB_CODE_TSC_DISCONNECTED;
+    STMT_RET(TSDB_CODE_TSC_DISCONNECTED);
   }
 
   if (insert) *insert = pStmt->isInsert;
 
-  return TSDB_CODE_SUCCESS;
+  STMT_RET(TSDB_CODE_SUCCESS);
 }
 
 int taos_stmt_num_params(TAOS_STMT *stmt, int *nums) {
   STscStmt* pStmt = (STscStmt*)stmt;
 
   if (stmt == NULL || pStmt->taos == NULL || pStmt->pSql == NULL) {
-    terrno = TSDB_CODE_TSC_DISCONNECTED;
-    return TSDB_CODE_TSC_DISCONNECTED;
+    STMT_RET(TSDB_CODE_TSC_DISCONNECTED);
   }
 
   if (pStmt->isInsert) {
     SSqlObj* pSql = pStmt->pSql;
     SSqlCmd *pCmd = &pSql->cmd;
     *nums = pCmd->insertParam.numOfParams;
-    return TSDB_CODE_SUCCESS;
+    STMT_RET(TSDB_CODE_SUCCESS);
   } else {
     SNormalStmt* normal = &pStmt->normal;
     *nums = normal->numParams;
-    return TSDB_CODE_SUCCESS;
+    STMT_RET(TSDB_CODE_SUCCESS);
   }
 }
 
@@ -1866,8 +1883,7 @@ int taos_stmt_get_param(TAOS_STMT *stmt, int idx, int *type, int *bytes) {
   STscStmt* pStmt = (STscStmt*)stmt;
 
   if (stmt == NULL || pStmt->taos == NULL || pStmt->pSql == NULL) {
-    terrno = TSDB_CODE_TSC_DISCONNECTED;
-    return TSDB_CODE_TSC_DISCONNECTED;
+    STMT_RET(TSDB_CODE_TSC_DISCONNECTED);
   }
 
   if (pStmt->isInsert) {
@@ -1884,24 +1900,37 @@ int taos_stmt_get_param(TAOS_STMT *stmt, int idx, int *type, int *bytes) {
       tscGetDataBlockFromList(pCmd->insertParam.pTableBlockHashList, pTableMeta->id.uid, TSDB_PAYLOAD_SIZE, sizeof(SSubmitBlk),
           pTableMeta->tableInfo.rowSize, &pTableMetaInfo->name, pTableMeta, &pBlock, NULL);
     if (ret != 0) {
-      // todo handle error
+      STMT_RET(ret);
     }
 
     if (idx<0 || idx>=pBlock->numOfParams) {
       tscError("0x%"PRIx64" param %d: out of range", pStmt->pSql->self, idx);
-      abort();
+      STMT_RET(invalidOperationMsg(tscGetErrorMsgPayload(&pStmt->pSql->cmd), "idx out of range"));
     }
 
     SParamInfo* param = &pBlock->params[idx];
     if (type) *type = param->type;
     if (bytes) *bytes = param->bytes;
 
-    return TSDB_CODE_SUCCESS;
+    STMT_RET(TSDB_CODE_SUCCESS);
   } else {
-    return TSDB_CODE_TSC_APP_ERROR;
+    STMT_RET(TSDB_CODE_COM_OPS_NOT_SUPPORT);
   }
 }
 
+
+char *taos_stmt_errstr(TAOS_STMT *stmt) {
+  STscStmt* pStmt = (STscStmt*)stmt;
+
+  if (stmt == NULL) {
+    return (char*) tstrerror(terrno);
+  }
+
+  return taos_errstr(pStmt->pSql);
+}
+
+
+
 const char *taos_data_type(int type) {
   switch (type) {
     case TSDB_DATA_TYPE_NULL:            return "TSDB_DATA_TYPE_NULL";
diff --git a/src/inc/taos.h b/src/inc/taos.h
index d27828fc36..9f72945ef0 100644
--- a/src/inc/taos.h
+++ b/src/inc/taos.h
@@ -124,6 +124,7 @@ int        taos_stmt_add_batch(TAOS_STMT *stmt);
 int        taos_stmt_execute(TAOS_STMT *stmt);
 TAOS_RES * taos_stmt_use_result(TAOS_STMT *stmt);
 int        taos_stmt_close(TAOS_STMT *stmt);
+char *     taos_stmt_errstr(TAOS_STMT *stmt);
 
 DLL_EXPORT TAOS_RES *taos_query(TAOS *taos, const char *sql);
 DLL_EXPORT TAOS_ROW taos_fetch_row(TAOS_RES *res);
diff --git a/tests/examples/c/apitest.c b/tests/examples/c/apitest.c
index 2961750efc..44d9d0cee6 100644
--- a/tests/examples/c/apitest.c
+++ b/tests/examples/c/apitest.c
@@ -342,7 +342,9 @@ void verify_prepare(TAOS* taos) {
   sql = "insert into m1 values(?,?,?,?,?,?,?,?,?,?)";
   code = taos_stmt_prepare(stmt, sql, 0);
   if (code != 0){
-    printf("\033[31mfailed to execute taos_stmt_prepare. code:0x%x\033[0m\n", code);
+    printf("\033[31mfailed to execute taos_stmt_prepare. error:%s\033[0m\n", taos_stmt_errstr(stmt));
+    taos_stmt_close(stmt);
+    return;
   }
   v.ts = 1591060628000;
   for (int i = 0; i < 10; ++i) {
@@ -365,8 +367,8 @@ void verify_prepare(TAOS* taos) {
     taos_stmt_add_batch(stmt);
   }
   if (taos_stmt_execute(stmt) != 0) {
+    printf("\033[31mfailed to execute insert statement.error:%s\033[0m\n", taos_stmt_errstr(stmt));
     taos_stmt_close(stmt);
-    printf("\033[31mfailed to execute insert statement.\033[0m\n");
     return;
   }
   taos_stmt_close(stmt);
@@ -378,8 +380,8 @@ void verify_prepare(TAOS* taos) {
   v.v2 = 15;
   taos_stmt_bind_param(stmt, params + 2);
   if (taos_stmt_execute(stmt) != 0) {
+    printf("\033[31mfailed to execute select statement.error:%s\033[0m\n", taos_stmt_errstr(stmt));
     taos_stmt_close(stmt);
-    printf("\033[31mfailed to execute select statement.\033[0m\n");
     return;
   }
 
@@ -530,12 +532,16 @@ void verify_prepare2(TAOS* taos) {
   sql = "insert into ? (ts, b, v1, v2, v4, v8, f4, f8, bin, blob) values(?,?,?,?,?,?,?,?,?,?)";
   code = taos_stmt_prepare(stmt, sql, 0);
   if (code != 0) {
-    printf("\033[31mfailed to execute taos_stmt_prepare. code:0x%x\033[0m\n", code);
+    printf("\033[31mfailed to execute taos_stmt_prepare. error:%s\033[0m\n", taos_stmt_errstr(stmt));
+    taos_stmt_close(stmt);
+    return;
   }
 
   code = taos_stmt_set_tbname(stmt, "m1");
   if (code != 0){
-    printf("\033[31mfailed to execute taos_stmt_prepare. code:0x%x\033[0m\n", code);
+    printf("\033[31mfailed to execute taos_stmt_prepare. error:%s\033[0m\n", taos_stmt_errstr(stmt));
+    taos_stmt_close(stmt);
+    return;
   }
   
   int64_t ts = 1591060628000;
@@ -569,7 +575,8 @@ void verify_prepare2(TAOS* taos) {
   taos_stmt_add_batch(stmt);
   
   if (taos_stmt_execute(stmt) != 0) {
-    printf("\033[31mfailed to execute insert statement.\033[0m\n");
+    printf("\033[31mfailed to execute insert statement.error:%s\033[0m\n", taos_stmt_errstr(stmt));
+    taos_stmt_close(stmt);
     return;
   }
 
@@ -596,7 +603,8 @@ void verify_prepare2(TAOS* taos) {
 
   taos_stmt_bind_param(stmt, qparams);
   if (taos_stmt_execute(stmt) != 0) {
-    printf("\033[31mfailed to execute select statement.\033[0m\n");
+    printf("\033[31mfailed to execute select statement.error:%s\033[0m\n", taos_stmt_errstr(stmt));
+    taos_stmt_close(stmt);    
     return;
   }
 
@@ -776,12 +784,16 @@ void verify_prepare3(TAOS* taos) {
   sql = "insert into ? using st1 tags(?,?) values(?,?,?,?,?,?,?,?,?,?)";
   code = taos_stmt_prepare(stmt, sql, 0);
   if (code != 0){
-    printf("\033[31mfailed to execute taos_stmt_prepare. code:0x%x\033[0m\n", code);
+    printf("\033[31mfailed to execute taos_stmt_prepare. error:%s\033[0m\n", taos_stmt_errstr(stmt));
+    taos_stmt_close(stmt);
+    return;    
   }
 
   code = taos_stmt_set_tbname_tags(stmt, "m1", tags);
   if (code != 0){
-    printf("\033[31mfailed to execute taos_stmt_prepare. code:0x%x\033[0m\n", code);
+    printf("\033[31mfailed to execute taos_stmt_prepare. error:%s\033[0m\n", taos_stmt_errstr(stmt));
+    taos_stmt_close(stmt);    
+    return;
   }
   
   int64_t ts = 1591060628000;
@@ -815,7 +827,8 @@ void verify_prepare3(TAOS* taos) {
   taos_stmt_add_batch(stmt);
   
   if (taos_stmt_execute(stmt) != 0) {
-    printf("\033[31mfailed to execute insert statement.\033[0m\n");
+    printf("\033[31mfailed to execute insert statement.error:%s\033[0m\n", taos_stmt_errstr(stmt));
+    taos_stmt_close(stmt);    
     return;
   }
   taos_stmt_close(stmt);
@@ -842,7 +855,8 @@ void verify_prepare3(TAOS* taos) {
 
   taos_stmt_bind_param(stmt, qparams);
   if (taos_stmt_execute(stmt) != 0) {
-    printf("\033[31mfailed to execute select statement.\033[0m\n");
+    printf("\033[31mfailed to execute select statement.error:%s\033[0m\n", taos_stmt_errstr(stmt));
+    taos_stmt_close(stmt);    
     return;
   }
 
diff --git a/tests/script/api/batchprepare.c b/tests/script/api/batchprepare.c
index 55eb62d9bb..72bb9471db 100644
--- a/tests/script/api/batchprepare.c
+++ b/tests/script/api/batchprepare.c
@@ -1458,6 +1458,160 @@ int stmt_funcb_autoctb3(TAOS_STMT *stmt) {
 
 
 
+
+//1 tables 10 records
+int stmt_funcb_autoctb4(TAOS_STMT *stmt) {
+  struct {
+      int64_t *ts;
+      int8_t b[10];
+      int8_t v1[10];
+      int16_t v2[10];
+      int32_t v4[10];
+      int64_t v8[10];
+      float f4[10];
+      double f8[10];
+      char bin[10][40];
+  } v = {0};
+
+  v.ts = malloc(sizeof(int64_t) * 1 * 10);
+  
+  int *lb = malloc(10 * sizeof(int));
+
+  TAOS_BIND *tags = calloc(1, sizeof(TAOS_BIND) * 9 * 1);
+  TAOS_MULTI_BIND *params = calloc(1, sizeof(TAOS_MULTI_BIND) * 1*5);
+
+//  int one_null = 1;
+  int one_not_null = 0;
+  
+  char* is_null = malloc(sizeof(char) * 10);
+  char* no_null = malloc(sizeof(char) * 10);
+
+  for (int i = 0; i < 10; ++i) {
+    lb[i] = 40;
+    no_null[i] = 0;
+    is_null[i] = (i % 10 == 2) ? 1 : 0;
+    v.b[i] = (int8_t)(i % 2);
+    v.v1[i] = (int8_t)((i+1) % 2);
+    v.v2[i] = (int16_t)i;
+    v.v4[i] = (int32_t)(i+1);
+    v.v8[i] = (int64_t)(i+2);
+    v.f4[i] = (float)(i+3);
+    v.f8[i] = (double)(i+4);
+    memset(v.bin[i], '0'+i%10, 40);
+  }
+  
+  for (int i = 0; i < 5; i+=5) {
+    params[i+0].buffer_type = TSDB_DATA_TYPE_TIMESTAMP;
+    params[i+0].buffer_length = sizeof(int64_t);
+    params[i+0].buffer = &v.ts[10*i/10];
+    params[i+0].length = NULL;
+    params[i+0].is_null = no_null;
+    params[i+0].num = 10;
+    
+    params[i+1].buffer_type = TSDB_DATA_TYPE_BOOL;
+    params[i+1].buffer_length = sizeof(int8_t);
+    params[i+1].buffer = v.b;
+    params[i+1].length = NULL;
+    params[i+1].is_null = is_null;
+    params[i+1].num = 10;
+
+    params[i+2].buffer_type = TSDB_DATA_TYPE_INT;
+    params[i+2].buffer_length = sizeof(int32_t);
+    params[i+2].buffer = v.v4;
+    params[i+2].length = NULL;
+    params[i+2].is_null = is_null;
+    params[i+2].num = 10;
+
+    params[i+3].buffer_type = TSDB_DATA_TYPE_BIGINT;
+    params[i+3].buffer_length = sizeof(int64_t);
+    params[i+3].buffer = v.v8;
+    params[i+3].length = NULL;
+    params[i+3].is_null = is_null;
+    params[i+3].num = 10;
+
+    params[i+4].buffer_type = TSDB_DATA_TYPE_DOUBLE;
+    params[i+4].buffer_length = sizeof(double);
+    params[i+4].buffer = v.f8;
+    params[i+4].length = NULL;
+    params[i+4].is_null = is_null;
+    params[i+4].num = 10;
+  }
+
+  int64_t tts = 1591060628000;
+  for (int i = 0; i < 10; ++i) {
+    v.ts[i] = tts + i;
+  }
+
+
+  for (int i = 0; i < 1; ++i) {
+    tags[i+0].buffer_type = TSDB_DATA_TYPE_BOOL;
+    tags[i+0].buffer = v.b;
+    tags[i+0].is_null = &one_not_null;
+    tags[i+0].length = NULL;
+
+    tags[i+1].buffer_type = TSDB_DATA_TYPE_SMALLINT;
+    tags[i+1].buffer = v.v2;
+    tags[i+1].is_null = &one_not_null;
+    tags[i+1].length = NULL;
+
+    tags[i+2].buffer_type = TSDB_DATA_TYPE_FLOAT;
+    tags[i+2].buffer = v.f4;
+    tags[i+2].is_null = &one_not_null;
+    tags[i+2].length = NULL;
+
+    tags[i+3].buffer_type = TSDB_DATA_TYPE_BINARY;
+    tags[i+3].buffer = v.bin;
+    tags[i+3].is_null = &one_not_null;
+    tags[i+3].length = (uintptr_t *)lb;
+  }
+
+
+  unsigned long long starttime = getCurrentTime();
+
+  char *sql = "insert into ? using stb1 tags(1,?,2,?,4,?,6.0,?,'b') (ts,b,v4,v8,f8) values(?,?,?,?,?)";
+  int code = taos_stmt_prepare(stmt, sql, 0);
+  if (code != 0){
+    printf("failed to execute taos_stmt_prepare. code:0x%x\n", code);
+    exit(1);
+  }
+
+  int id = 0;
+  for (int zz = 0; zz < 1; zz++) {
+    char buf[32];
+    sprintf(buf, "m%d", zz);
+    code = taos_stmt_set_tbname_tags(stmt, buf, tags);
+    if (code != 0){
+      printf("failed to execute taos_stmt_set_tbname_tags. code:0x%x\n", code);
+    }  
+
+    taos_stmt_bind_param_batch(stmt, params + id * 5);
+    taos_stmt_add_batch(stmt);
+  }
+
+  if (taos_stmt_execute(stmt) != 0) {
+    printf("failed to execute insert statement.\n");
+    exit(1);
+  }
+
+  ++id;
+
+  unsigned long long endtime = getCurrentTime();
+  printf("insert total %d records, used %u seconds, avg:%u useconds\n", 10, (endtime-starttime)/1000000UL, (endtime-starttime)/(10));
+
+  free(v.ts);  
+  free(lb);
+  free(params);
+  free(is_null);
+  free(no_null);
+  free(tags);
+
+  return 0;
+}
+
+
+
+
+
 //1 tables 10 records
 int stmt_funcb_autoctb_e1(TAOS_STMT *stmt) {
   struct {
@@ -1606,7 +1760,7 @@ int stmt_funcb_autoctb_e1(TAOS_STMT *stmt) {
   char *sql = "insert into ? using stb1 (id1,id2,id3,id4,id5,id6,id7,id8,id9) tags(1,?,2,?,4,?,6.0,?,'b') values(?,?,?,?,?,?,?,?,?,?)";
   int code = taos_stmt_prepare(stmt, sql, 0);
   if (code != 0){
-    printf("failed to execute taos_stmt_prepare. code:0x%x\n", code);
+    printf("failed to execute taos_stmt_prepare. error:%s\n", taos_stmt_errstr(stmt));
     return -1;
   }
 
@@ -1824,6 +1978,224 @@ int stmt_funcb_autoctb_e2(TAOS_STMT *stmt) {
     exit(1);
   }
 
+  int id = 0;
+  for (int zz = 0; zz < 1; zz++) {
+    char buf[32];
+    sprintf(buf, "m%d", zz);
+    code = taos_stmt_set_tbname_tags(stmt, buf, NULL);
+    if (code != 0){
+      printf("failed to execute taos_stmt_set_tbname_tags. code:%s\n", taos_stmt_errstr(stmt));
+      return -1;
+    }  
+
+    taos_stmt_bind_param_batch(stmt, params + id * 10);
+    taos_stmt_add_batch(stmt);
+  }
+
+  if (taos_stmt_execute(stmt) != 0) {
+    printf("failed to execute insert statement.\n");
+    exit(1);
+  }
+
+  ++id;
+
+  unsigned long long endtime = getCurrentTime();
+  printf("insert total %d records, used %u seconds, avg:%u useconds\n", 10, (endtime-starttime)/1000000UL, (endtime-starttime)/(10));
+
+  free(v.ts);  
+  free(lb);
+  free(params);
+  free(is_null);
+  free(no_null);
+  free(tags);
+
+  return 0;
+}
+
+
+
+
+
+
+
+//1 tables 10 records
+int stmt_funcb_autoctb_e3(TAOS_STMT *stmt) {
+  struct {
+      int64_t *ts;
+      int8_t b[10];
+      int8_t v1[10];
+      int16_t v2[10];
+      int32_t v4[10];
+      int64_t v8[10];
+      float f4[10];
+      double f8[10];
+      char bin[10][40];
+  } v = {0};
+
+  v.ts = malloc(sizeof(int64_t) * 1 * 10);
+  
+  int *lb = malloc(10 * sizeof(int));
+
+  TAOS_BIND *tags = calloc(1, sizeof(TAOS_BIND) * 9 * 1);
+  TAOS_MULTI_BIND *params = calloc(1, sizeof(TAOS_MULTI_BIND) * 1*10);
+
+//  int one_null = 1;
+  int one_not_null = 0;
+  
+  char* is_null = malloc(sizeof(char) * 10);
+  char* no_null = malloc(sizeof(char) * 10);
+
+  for (int i = 0; i < 10; ++i) {
+    lb[i] = 40;
+    no_null[i] = 0;
+    is_null[i] = (i % 10 == 2) ? 1 : 0;
+    v.b[i] = (int8_t)(i % 2);
+    v.v1[i] = (int8_t)((i+1) % 2);
+    v.v2[i] = (int16_t)i;
+    v.v4[i] = (int32_t)(i+1);
+    v.v8[i] = (int64_t)(i+2);
+    v.f4[i] = (float)(i+3);
+    v.f8[i] = (double)(i+4);
+    memset(v.bin[i], '0'+i%10, 40);
+  }
+  
+  for (int i = 0; i < 10; i+=10) {
+    params[i+0].buffer_type = TSDB_DATA_TYPE_TIMESTAMP;
+    params[i+0].buffer_length = sizeof(int64_t);
+    params[i+0].buffer = &v.ts[10*i/10];
+    params[i+0].length = NULL;
+    params[i+0].is_null = no_null;
+    params[i+0].num = 10;
+    
+    params[i+1].buffer_type = TSDB_DATA_TYPE_BOOL;
+    params[i+1].buffer_length = sizeof(int8_t);
+    params[i+1].buffer = v.b;
+    params[i+1].length = NULL;
+    params[i+1].is_null = is_null;
+    params[i+1].num = 10;
+
+    params[i+2].buffer_type = TSDB_DATA_TYPE_TINYINT;
+    params[i+2].buffer_length = sizeof(int8_t);
+    params[i+2].buffer = v.v1;
+    params[i+2].length = NULL;
+    params[i+2].is_null = is_null;
+    params[i+2].num = 10;
+
+    params[i+3].buffer_type = TSDB_DATA_TYPE_SMALLINT;
+    params[i+3].buffer_length = sizeof(int16_t);
+    params[i+3].buffer = v.v2;
+    params[i+3].length = NULL;
+    params[i+3].is_null = is_null;
+    params[i+3].num = 10;
+
+    params[i+4].buffer_type = TSDB_DATA_TYPE_INT;
+    params[i+4].buffer_length = sizeof(int32_t);
+    params[i+4].buffer = v.v4;
+    params[i+4].length = NULL;
+    params[i+4].is_null = is_null;
+    params[i+4].num = 10;
+
+    params[i+5].buffer_type = TSDB_DATA_TYPE_BIGINT;
+    params[i+5].buffer_length = sizeof(int64_t);
+    params[i+5].buffer = v.v8;
+    params[i+5].length = NULL;
+    params[i+5].is_null = is_null;
+    params[i+5].num = 10;
+
+    params[i+6].buffer_type = TSDB_DATA_TYPE_FLOAT;
+    params[i+6].buffer_length = sizeof(float);
+    params[i+6].buffer = v.f4;
+    params[i+6].length = NULL;
+    params[i+6].is_null = is_null;
+    params[i+6].num = 10;
+
+    params[i+7].buffer_type = TSDB_DATA_TYPE_DOUBLE;
+    params[i+7].buffer_length = sizeof(double);
+    params[i+7].buffer = v.f8;
+    params[i+7].length = NULL;
+    params[i+7].is_null = is_null;
+    params[i+7].num = 10;
+
+    params[i+8].buffer_type = TSDB_DATA_TYPE_BINARY;
+    params[i+8].buffer_length = 40;
+    params[i+8].buffer = v.bin;
+    params[i+8].length = lb;
+    params[i+8].is_null = is_null;
+    params[i+8].num = 10;
+
+    params[i+9].buffer_type = TSDB_DATA_TYPE_BINARY;
+    params[i+9].buffer_length = 40;
+    params[i+9].buffer = v.bin;
+    params[i+9].length = lb;
+    params[i+9].is_null = is_null;
+    params[i+9].num = 10;
+    
+  }
+
+  int64_t tts = 1591060628000;
+  for (int i = 0; i < 10; ++i) {
+    v.ts[i] = tts + i;
+  }
+
+
+  for (int i = 0; i < 1; ++i) {
+    tags[i+0].buffer_type = TSDB_DATA_TYPE_INT;
+    tags[i+0].buffer = v.v4;
+    tags[i+0].is_null = &one_not_null;
+    tags[i+0].length = NULL;
+
+    tags[i+1].buffer_type = TSDB_DATA_TYPE_BOOL;
+    tags[i+1].buffer = v.b;
+    tags[i+1].is_null = &one_not_null;
+    tags[i+1].length = NULL;
+
+    tags[i+2].buffer_type = TSDB_DATA_TYPE_TINYINT;
+    tags[i+2].buffer = v.v1;
+    tags[i+2].is_null = &one_not_null;
+    tags[i+2].length = NULL;
+
+    tags[i+3].buffer_type = TSDB_DATA_TYPE_SMALLINT;
+    tags[i+3].buffer = v.v2;
+    tags[i+3].is_null = &one_not_null;
+    tags[i+3].length = NULL;
+
+    tags[i+4].buffer_type = TSDB_DATA_TYPE_BIGINT;
+    tags[i+4].buffer = v.v8;
+    tags[i+4].is_null = &one_not_null;
+    tags[i+4].length = NULL;
+
+    tags[i+5].buffer_type = TSDB_DATA_TYPE_FLOAT;
+    tags[i+5].buffer = v.f4;
+    tags[i+5].is_null = &one_not_null;
+    tags[i+5].length = NULL;
+
+    tags[i+6].buffer_type = TSDB_DATA_TYPE_DOUBLE;
+    tags[i+6].buffer = v.f8;
+    tags[i+6].is_null = &one_not_null;
+    tags[i+6].length = NULL;
+
+    tags[i+7].buffer_type = TSDB_DATA_TYPE_BINARY;
+    tags[i+7].buffer = v.bin;
+    tags[i+7].is_null = &one_not_null;
+    tags[i+7].length = (uintptr_t *)lb;
+
+    tags[i+8].buffer_type = TSDB_DATA_TYPE_NCHAR;
+    tags[i+8].buffer = v.bin;
+    tags[i+8].is_null = &one_not_null;
+    tags[i+8].length = (uintptr_t *)lb;
+  }
+
+
+  unsigned long long starttime = getCurrentTime();
+
+  char *sql = "insert into ? using stb1 (id1,id2,id3,id4,id5,id6,id7,id8,id9) tags(?,?,?,?,?,?,?,?,?) values(?,?,?,?,?,?,?,?,?,?)";
+  int code = taos_stmt_prepare(stmt, sql, 0);
+  if (code != 0){
+    printf("failed to execute taos_stmt_prepare. code:%s\n", taos_stmt_errstr(stmt));
+    return -1;
+    //exit(1);
+  }
+
   int id = 0;
   for (int zz = 0; zz < 1; zz++) {
     char buf[32];
@@ -1860,6 +2232,458 @@ int stmt_funcb_autoctb_e2(TAOS_STMT *stmt) {
 
 
 
+
+//1 tables 10 records
+int stmt_funcb_autoctb_e4(TAOS_STMT *stmt) {
+  struct {
+      int64_t *ts;
+      int8_t b[10];
+      int8_t v1[10];
+      int16_t v2[10];
+      int32_t v4[10];
+      int64_t v8[10];
+      float f4[10];
+      double f8[10];
+      char bin[10][40];
+  } v = {0};
+
+  v.ts = malloc(sizeof(int64_t) * 1 * 10);
+  
+  int *lb = malloc(10 * sizeof(int));
+
+  TAOS_BIND *tags = calloc(1, sizeof(TAOS_BIND) * 9 * 1);
+  TAOS_MULTI_BIND *params = calloc(1, sizeof(TAOS_MULTI_BIND) * 1*10);
+
+//  int one_null = 1;
+  int one_not_null = 0;
+  
+  char* is_null = malloc(sizeof(char) * 10);
+  char* no_null = malloc(sizeof(char) * 10);
+
+  for (int i = 0; i < 10; ++i) {
+    lb[i] = 40;
+    no_null[i] = 0;
+    is_null[i] = (i % 10 == 2) ? 1 : 0;
+    v.b[i] = (int8_t)(i % 2);
+    v.v1[i] = (int8_t)((i+1) % 2);
+    v.v2[i] = (int16_t)i;
+    v.v4[i] = (int32_t)(i+1);
+    v.v8[i] = (int64_t)(i+2);
+    v.f4[i] = (float)(i+3);
+    v.f8[i] = (double)(i+4);
+    memset(v.bin[i], '0'+i%10, 40);
+  }
+  
+  for (int i = 0; i < 10; i+=10) {
+    params[i+0].buffer_type = TSDB_DATA_TYPE_TIMESTAMP;
+    params[i+0].buffer_length = sizeof(int64_t);
+    params[i+0].buffer = &v.ts[10*i/10];
+    params[i+0].length = NULL;
+    params[i+0].is_null = no_null;
+    params[i+0].num = 10;
+    
+    params[i+1].buffer_type = TSDB_DATA_TYPE_BOOL;
+    params[i+1].buffer_length = sizeof(int8_t);
+    params[i+1].buffer = v.b;
+    params[i+1].length = NULL;
+    params[i+1].is_null = is_null;
+    params[i+1].num = 10;
+
+    params[i+2].buffer_type = TSDB_DATA_TYPE_TINYINT;
+    params[i+2].buffer_length = sizeof(int8_t);
+    params[i+2].buffer = v.v1;
+    params[i+2].length = NULL;
+    params[i+2].is_null = is_null;
+    params[i+2].num = 10;
+
+    params[i+3].buffer_type = TSDB_DATA_TYPE_SMALLINT;
+    params[i+3].buffer_length = sizeof(int16_t);
+    params[i+3].buffer = v.v2;
+    params[i+3].length = NULL;
+    params[i+3].is_null = is_null;
+    params[i+3].num = 10;
+
+    params[i+4].buffer_type = TSDB_DATA_TYPE_INT;
+    params[i+4].buffer_length = sizeof(int32_t);
+    params[i+4].buffer = v.v4;
+    params[i+4].length = NULL;
+    params[i+4].is_null = is_null;
+    params[i+4].num = 10;
+
+    params[i+5].buffer_type = TSDB_DATA_TYPE_BIGINT;
+    params[i+5].buffer_length = sizeof(int64_t);
+    params[i+5].buffer = v.v8;
+    params[i+5].length = NULL;
+    params[i+5].is_null = is_null;
+    params[i+5].num = 10;
+
+    params[i+6].buffer_type = TSDB_DATA_TYPE_FLOAT;
+    params[i+6].buffer_length = sizeof(float);
+    params[i+6].buffer = v.f4;
+    params[i+6].length = NULL;
+    params[i+6].is_null = is_null;
+    params[i+6].num = 10;
+
+    params[i+7].buffer_type = TSDB_DATA_TYPE_DOUBLE;
+    params[i+7].buffer_length = sizeof(double);
+    params[i+7].buffer = v.f8;
+    params[i+7].length = NULL;
+    params[i+7].is_null = is_null;
+    params[i+7].num = 10;
+
+    params[i+8].buffer_type = TSDB_DATA_TYPE_BINARY;
+    params[i+8].buffer_length = 40;
+    params[i+8].buffer = v.bin;
+    params[i+8].length = lb;
+    params[i+8].is_null = is_null;
+    params[i+8].num = 10;
+
+    params[i+9].buffer_type = TSDB_DATA_TYPE_BINARY;
+    params[i+9].buffer_length = 40;
+    params[i+9].buffer = v.bin;
+    params[i+9].length = lb;
+    params[i+9].is_null = is_null;
+    params[i+9].num = 10;
+    
+  }
+
+  int64_t tts = 1591060628000;
+  for (int i = 0; i < 10; ++i) {
+    v.ts[i] = tts + i;
+  }
+
+
+  for (int i = 0; i < 1; ++i) {
+    tags[i+0].buffer_type = TSDB_DATA_TYPE_INT;
+    tags[i+0].buffer = v.v4;
+    tags[i+0].is_null = &one_not_null;
+    tags[i+0].length = NULL;
+
+    tags[i+1].buffer_type = TSDB_DATA_TYPE_BOOL;
+    tags[i+1].buffer = v.b;
+    tags[i+1].is_null = &one_not_null;
+    tags[i+1].length = NULL;
+
+    tags[i+2].buffer_type = TSDB_DATA_TYPE_TINYINT;
+    tags[i+2].buffer = v.v1;
+    tags[i+2].is_null = &one_not_null;
+    tags[i+2].length = NULL;
+
+    tags[i+3].buffer_type = TSDB_DATA_TYPE_SMALLINT;
+    tags[i+3].buffer = v.v2;
+    tags[i+3].is_null = &one_not_null;
+    tags[i+3].length = NULL;
+
+    tags[i+4].buffer_type = TSDB_DATA_TYPE_BIGINT;
+    tags[i+4].buffer = v.v8;
+    tags[i+4].is_null = &one_not_null;
+    tags[i+4].length = NULL;
+
+    tags[i+5].buffer_type = TSDB_DATA_TYPE_FLOAT;
+    tags[i+5].buffer = v.f4;
+    tags[i+5].is_null = &one_not_null;
+    tags[i+5].length = NULL;
+
+    tags[i+6].buffer_type = TSDB_DATA_TYPE_DOUBLE;
+    tags[i+6].buffer = v.f8;
+    tags[i+6].is_null = &one_not_null;
+    tags[i+6].length = NULL;
+
+    tags[i+7].buffer_type = TSDB_DATA_TYPE_BINARY;
+    tags[i+7].buffer = v.bin;
+    tags[i+7].is_null = &one_not_null;
+    tags[i+7].length = (uintptr_t *)lb;
+
+    tags[i+8].buffer_type = TSDB_DATA_TYPE_NCHAR;
+    tags[i+8].buffer = v.bin;
+    tags[i+8].is_null = &one_not_null;
+    tags[i+8].length = (uintptr_t *)lb;
+  }
+
+
+  unsigned long long starttime = getCurrentTime();
+
+  char *sql = "insert into ? using stb1 tags(?,?,?,?,?,?,?,?,?) values(?,?,?,?,?,?,?,?,?,?)";
+  int code = taos_stmt_prepare(stmt, sql, 0);
+  if (code != 0){
+    printf("failed to execute taos_stmt_prepare. code:%s\n", taos_stmt_errstr(stmt));
+    exit(1);
+  }
+
+  int id = 0;
+  for (int zz = 0; zz < 1; zz++) {
+    char buf[32];
+    sprintf(buf, "m%d", zz);
+    code = taos_stmt_set_tbname_tags(stmt, buf, tags);
+    if (code != 0){
+      printf("failed to execute taos_stmt_set_tbname_tags. error:%s\n", taos_stmt_errstr(stmt));
+      exit(1);
+    }  
+
+    code = taos_stmt_bind_param_batch(stmt, params + id * 10);
+    if (code != 0) {
+      printf("failed to execute taos_stmt_bind_param_batch. error:%s\n", taos_stmt_errstr(stmt));
+      exit(1);
+    }
+    
+    code = taos_stmt_bind_param_batch(stmt, params + id * 10);
+    if (code != 0) {
+      printf("failed to execute taos_stmt_bind_param_batch. error:%s\n", taos_stmt_errstr(stmt));
+      return -1;
+    }
+    
+    taos_stmt_add_batch(stmt);
+  }
+
+  if (taos_stmt_execute(stmt) != 0) {
+    printf("failed to execute insert statement.\n");
+    exit(1);
+  }
+
+  ++id;
+
+  unsigned long long endtime = getCurrentTime();
+  printf("insert total %d records, used %u seconds, avg:%u useconds\n", 10, (endtime-starttime)/1000000UL, (endtime-starttime)/(10));
+
+  free(v.ts);  
+  free(lb);
+  free(params);
+  free(is_null);
+  free(no_null);
+  free(tags);
+
+  return 0;
+}
+
+
+
+
+
+
+//1 tables 10 records
+int stmt_funcb_autoctb_e5(TAOS_STMT *stmt) {
+  struct {
+      int64_t *ts;
+      int8_t b[10];
+      int8_t v1[10];
+      int16_t v2[10];
+      int32_t v4[10];
+      int64_t v8[10];
+      float f4[10];
+      double f8[10];
+      char bin[10][40];
+  } v = {0};
+
+  v.ts = malloc(sizeof(int64_t) * 1 * 10);
+  
+  int *lb = malloc(10 * sizeof(int));
+
+  TAOS_BIND *tags = calloc(1, sizeof(TAOS_BIND) * 9 * 1);
+  TAOS_MULTI_BIND *params = calloc(1, sizeof(TAOS_MULTI_BIND) * 1*10);
+
+//  int one_null = 1;
+  int one_not_null = 0;
+  
+  char* is_null = malloc(sizeof(char) * 10);
+  char* no_null = malloc(sizeof(char) * 10);
+
+  for (int i = 0; i < 10; ++i) {
+    lb[i] = 40;
+    no_null[i] = 0;
+    is_null[i] = (i % 10 == 2) ? 1 : 0;
+    v.b[i] = (int8_t)(i % 2);
+    v.v1[i] = (int8_t)((i+1) % 2);
+    v.v2[i] = (int16_t)i;
+    v.v4[i] = (int32_t)(i+1);
+    v.v8[i] = (int64_t)(i+2);
+    v.f4[i] = (float)(i+3);
+    v.f8[i] = (double)(i+4);
+    memset(v.bin[i], '0'+i%10, 40);
+  }
+  
+  for (int i = 0; i < 10; i+=10) {
+    params[i+0].buffer_type = TSDB_DATA_TYPE_TIMESTAMP;
+    params[i+0].buffer_length = sizeof(int64_t);
+    params[i+0].buffer = &v.ts[10*i/10];
+    params[i+0].length = NULL;
+    params[i+0].is_null = no_null;
+    params[i+0].num = 10;
+    
+    params[i+1].buffer_type = TSDB_DATA_TYPE_BOOL;
+    params[i+1].buffer_length = sizeof(int8_t);
+    params[i+1].buffer = v.b;
+    params[i+1].length = NULL;
+    params[i+1].is_null = is_null;
+    params[i+1].num = 10;
+
+    params[i+2].buffer_type = TSDB_DATA_TYPE_TINYINT;
+    params[i+2].buffer_length = sizeof(int8_t);
+    params[i+2].buffer = v.v1;
+    params[i+2].length = NULL;
+    params[i+2].is_null = is_null;
+    params[i+2].num = 10;
+
+    params[i+3].buffer_type = TSDB_DATA_TYPE_SMALLINT;
+    params[i+3].buffer_length = sizeof(int16_t);
+    params[i+3].buffer = v.v2;
+    params[i+3].length = NULL;
+    params[i+3].is_null = is_null;
+    params[i+3].num = 10;
+
+    params[i+4].buffer_type = TSDB_DATA_TYPE_INT;
+    params[i+4].buffer_length = sizeof(int32_t);
+    params[i+4].buffer = v.v4;
+    params[i+4].length = NULL;
+    params[i+4].is_null = is_null;
+    params[i+4].num = 10;
+
+    params[i+5].buffer_type = TSDB_DATA_TYPE_BIGINT;
+    params[i+5].buffer_length = sizeof(int64_t);
+    params[i+5].buffer = v.v8;
+    params[i+5].length = NULL;
+    params[i+5].is_null = is_null;
+    params[i+5].num = 10;
+
+    params[i+6].buffer_type = TSDB_DATA_TYPE_FLOAT;
+    params[i+6].buffer_length = sizeof(float);
+    params[i+6].buffer = v.f4;
+    params[i+6].length = NULL;
+    params[i+6].is_null = is_null;
+    params[i+6].num = 10;
+
+    params[i+7].buffer_type = TSDB_DATA_TYPE_DOUBLE;
+    params[i+7].buffer_length = sizeof(double);
+    params[i+7].buffer = v.f8;
+    params[i+7].length = NULL;
+    params[i+7].is_null = is_null;
+    params[i+7].num = 10;
+
+    params[i+8].buffer_type = TSDB_DATA_TYPE_BINARY;
+    params[i+8].buffer_length = 40;
+    params[i+8].buffer = v.bin;
+    params[i+8].length = lb;
+    params[i+8].is_null = is_null;
+    params[i+8].num = 10;
+
+    params[i+9].buffer_type = TSDB_DATA_TYPE_BINARY;
+    params[i+9].buffer_length = 40;
+    params[i+9].buffer = v.bin;
+    params[i+9].length = lb;
+    params[i+9].is_null = is_null;
+    params[i+9].num = 10;
+    
+  }
+
+  int64_t tts = 1591060628000;
+  for (int i = 0; i < 10; ++i) {
+    v.ts[i] = tts + i;
+  }
+
+
+  for (int i = 0; i < 1; ++i) {
+    tags[i+0].buffer_type = TSDB_DATA_TYPE_INT;
+    tags[i+0].buffer = v.v4;
+    tags[i+0].is_null = &one_not_null;
+    tags[i+0].length = NULL;
+
+    tags[i+1].buffer_type = TSDB_DATA_TYPE_BOOL;
+    tags[i+1].buffer = v.b;
+    tags[i+1].is_null = &one_not_null;
+    tags[i+1].length = NULL;
+
+    tags[i+2].buffer_type = TSDB_DATA_TYPE_TINYINT;
+    tags[i+2].buffer = v.v1;
+    tags[i+2].is_null = &one_not_null;
+    tags[i+2].length = NULL;
+
+    tags[i+3].buffer_type = TSDB_DATA_TYPE_SMALLINT;
+    tags[i+3].buffer = v.v2;
+    tags[i+3].is_null = &one_not_null;
+    tags[i+3].length = NULL;
+
+    tags[i+4].buffer_type = TSDB_DATA_TYPE_BIGINT;
+    tags[i+4].buffer = v.v8;
+    tags[i+4].is_null = &one_not_null;
+    tags[i+4].length = NULL;
+
+    tags[i+5].buffer_type = TSDB_DATA_TYPE_FLOAT;
+    tags[i+5].buffer = v.f4;
+    tags[i+5].is_null = &one_not_null;
+    tags[i+5].length = NULL;
+
+    tags[i+6].buffer_type = TSDB_DATA_TYPE_DOUBLE;
+    tags[i+6].buffer = v.f8;
+    tags[i+6].is_null = &one_not_null;
+    tags[i+6].length = NULL;
+
+    tags[i+7].buffer_type = TSDB_DATA_TYPE_BINARY;
+    tags[i+7].buffer = v.bin;
+    tags[i+7].is_null = &one_not_null;
+    tags[i+7].length = (uintptr_t *)lb;
+
+    tags[i+8].buffer_type = TSDB_DATA_TYPE_NCHAR;
+    tags[i+8].buffer = v.bin;
+    tags[i+8].is_null = &one_not_null;
+    tags[i+8].length = (uintptr_t *)lb;
+  }
+
+
+  unsigned long long starttime = getCurrentTime();
+
+  char *sql = "insert into ? using stb1 tags(?,?,?,?,?,?,?,?,?) values(?,?,?,?,?,?,?,?,?,?)";
+  int code = taos_stmt_prepare(NULL, sql, 0);
+  if (code != 0){
+    printf("failed to execute taos_stmt_prepare. code:%s\n", taos_stmt_errstr(NULL));
+    return -1;
+  }
+
+  int id = 0;
+  for (int zz = 0; zz < 1; zz++) {
+    char buf[32];
+    sprintf(buf, "m%d", zz);
+    code = taos_stmt_set_tbname_tags(stmt, buf, tags);
+    if (code != 0){
+      printf("failed to execute taos_stmt_set_tbname_tags. error:%s\n", taos_stmt_errstr(stmt));
+      exit(1);
+    }  
+
+    code = taos_stmt_bind_param_batch(stmt, params + id * 10);
+    if (code != 0) {
+      printf("failed to execute taos_stmt_bind_param_batch. error:%s\n", taos_stmt_errstr(stmt));
+      exit(1);
+    }
+    
+    code = taos_stmt_bind_param_batch(stmt, params + id * 10);
+    if (code != 0) {
+      printf("failed to execute taos_stmt_bind_param_batch. error:%s\n", taos_stmt_errstr(stmt));
+      return -1;
+    }
+    
+    taos_stmt_add_batch(stmt);
+  }
+
+  if (taos_stmt_execute(stmt) != 0) {
+    printf("failed to execute insert statement.\n");
+    exit(1);
+  }
+
+  ++id;
+
+  unsigned long long endtime = getCurrentTime();
+  printf("insert total %d records, used %u seconds, avg:%u useconds\n", 10, (endtime-starttime)/1000000UL, (endtime-starttime)/(10));
+
+  free(v.ts);  
+  free(lb);
+  free(params);
+  free(is_null);
+  free(no_null);
+  free(tags);
+
+  return 0;
+}
+
+
+
 //300 tables 60 records
 int stmt_funcb1(TAOS_STMT *stmt) {
   struct {
@@ -3375,6 +4199,9 @@ void check_result(TAOS     *taos, char *tname, int printr, int expected) {
   char sql[255] = "SELECT * FROM ";
   TAOS_RES *result;
 
+  //FORCE NO PRINT
+  printr = 0;
+
   strcat(sql, tname);
 
   result = taos_query(taos, sql);
@@ -3835,7 +4662,7 @@ void* runcase(void *par) {
 #endif
 
 
-#if 1  
+#if 1 
   prepare(taos, 1, 1);
 
   stmt = taos_stmt_init(taos);
@@ -3859,9 +4686,9 @@ void* runcase(void *par) {
 
   stmt = taos_stmt_init(taos);
 
-  printf("1t+10r+bm+autoctb start\n");
+  printf("1t+10r+bm+autoctb1 start\n");
   stmt_funcb_autoctb1(stmt);
-  printf("1t+10r+bm+autoctb end\n");
+  printf("1t+10r+bm+autoctb1 end\n");
   printf("check result start\n");
   check_result(taos, "m0", 1, 10);
   printf("check result end\n");
@@ -3874,9 +4701,9 @@ void* runcase(void *par) {
 
   stmt = taos_stmt_init(taos);
 
-  printf("1t+10r+bm+autoctb start\n");
+  printf("1t+10r+bm+autoctb2 start\n");
   stmt_funcb_autoctb2(stmt);
-  printf("1t+10r+bm+autoctb end\n");
+  printf("1t+10r+bm+autoctb2 end\n");
   printf("check result start\n");
   check_result(taos, "m0", 1, 10);
   printf("check result end\n");
@@ -3890,9 +4717,9 @@ void* runcase(void *par) {
 
   stmt = taos_stmt_init(taos);
 
-  printf("1t+10r+bm+autoctb start\n");
+  printf("1t+10r+bm+autoctb3 start\n");
   stmt_funcb_autoctb3(stmt);
-  printf("1t+10r+bm+autoctb end\n");
+  printf("1t+10r+bm+autoctb3 end\n");
   printf("check result start\n");
   check_result(taos, "m0", 1, 10);
   printf("check result end\n");
@@ -3900,11 +4727,27 @@ void* runcase(void *par) {
 
 #endif
 
+
 #if 1  
   prepare(taos, 1, 0);
 
   stmt = taos_stmt_init(taos);
 
+  printf("1t+10r+bm+autoctb4 start\n");
+  stmt_funcb_autoctb4(stmt);
+  printf("1t+10r+bm+autoctb4 end\n");
+  printf("check result start\n");
+  check_result(taos, "m0", 1, 10);
+  printf("check result end\n");
+  taos_stmt_close(stmt);
+#endif
+
+
+#if 1 
+  prepare(taos, 1, 0);
+
+  stmt = taos_stmt_init(taos);
+
   printf("1t+10r+bm+autoctb+e1 start\n");
   stmt_funcb_autoctb_e1(stmt);
   printf("1t+10r+bm+autoctb+e1 end\n");
@@ -3930,6 +4773,52 @@ void* runcase(void *par) {
 
 #endif
 
+#if 1  
+  prepare(taos, 1, 0);
+
+  stmt = taos_stmt_init(taos);
+
+  printf("1t+10r+bm+autoctb+e3 start\n");
+  stmt_funcb_autoctb_e3(stmt);
+  printf("1t+10r+bm+autoctb+e3 end\n");
+  printf("check result start\n");
+  //check_result(taos, "m0", 1, 0);
+  printf("check result end\n");
+  taos_stmt_close(stmt);
+
+#endif
+
+
+#if 1  
+  prepare(taos, 1, 0);
+
+  stmt = taos_stmt_init(taos);
+
+  printf("1t+10r+bm+autoctb+e4 start\n");
+  stmt_funcb_autoctb_e4(stmt);
+  printf("1t+10r+bm+autoctb+e4 end\n");
+  printf("check result start\n");
+  //check_result(taos, "m0", 1, 0);
+  printf("check result end\n");
+  taos_stmt_close(stmt);
+
+#endif
+
+#if 1  
+  prepare(taos, 1, 0);
+
+  stmt = taos_stmt_init(taos);
+
+  printf("1t+10r+bm+autoctb+e5 start\n");
+  stmt_funcb_autoctb_e5(stmt);
+  printf("1t+10r+bm+autoctb+e5 end\n");
+  printf("check result start\n");
+  //check_result(taos, "m0", 1, 0);
+  printf("check result end\n");
+  taos_stmt_close(stmt);
+
+#endif
+
 
 #if 1
   prepare(taos, 1, 1);
@@ -4138,6 +5027,8 @@ void* runcase(void *par) {
 
 #endif
 
+  printf("test end\n");
+
   return NULL;
 
 }