diff --git a/src/client/inc/tscParseLine.h b/src/client/inc/tscParseLine.h
index 57afe9747e306631e51248fc1f783cff03836a58..a7324226c303431c9e394457a3804a39c466046e 100644
--- a/src/client/inc/tscParseLine.h
+++ b/src/client/inc/tscParseLine.h
@@ -23,6 +23,8 @@ extern "C" {
 #define SML_TIMESTAMP_SECOND_DIGITS 10
 #define SML_TIMESTAMP_MILLI_SECOND_DIGITS 13
 
+typedef SML_PROTOCOL_TYPE SMLProtocolType;
+
 typedef struct {
   char* key;
   uint8_t type;
@@ -46,22 +48,16 @@ typedef struct {
 } TAOS_SML_DATA_POINT;
 
 typedef enum {
-  SML_TIME_STAMP_NOW,
+  SML_TIME_STAMP_NOT_CONFIGURED,
   SML_TIME_STAMP_HOURS,
   SML_TIME_STAMP_MINUTES,
   SML_TIME_STAMP_SECONDS,
   SML_TIME_STAMP_MILLI_SECONDS,
   SML_TIME_STAMP_MICRO_SECONDS,
   SML_TIME_STAMP_NANO_SECONDS,
-  SML_TIME_STAMP_NOT_CONFIGURED
+  SML_TIME_STAMP_NOW
 } SMLTimeStampType;
 
-typedef enum {
-  SML_LINE_PROTOCOL = 0,
-  SML_TELNET_PROTOCOL = 1,
-  SML_JSON_PROTOCOL = 2,
-} SMLProtocolType;
-
 typedef struct {
   uint64_t id;
   SMLProtocolType protocol;
diff --git a/src/client/src/tscParseLineProtocol.c b/src/client/src/tscParseLineProtocol.c
index 665fdfcb31edfa218f28abeb11e0d9e472f3e0af..54b24ce5d2a8806c1b1a63799584baccd467e6c7 100644
--- a/src/client/src/tscParseLineProtocol.c
+++ b/src/client/src/tscParseLineProtocol.c
@@ -2300,52 +2300,52 @@ cleanup:
   return code;
 }
 
-int32_t convertPrecisionStrType(const char* precision, SMLTimeStampType *tsType) {
-  if (precision == NULL) {
-    *tsType = SML_TIME_STAMP_NOT_CONFIGURED;
-    return TSDB_CODE_SUCCESS;
-  }
-  if (strcmp(precision, "μ") == 0) {
-    *tsType = SML_TIME_STAMP_MICRO_SECONDS;
-    return TSDB_CODE_SUCCESS;
+static int32_t convertPrecisionType(int precision, SMLTimeStampType *tsType) {
+  switch (precision) {
+    case SML_TIMESTAMP_NOT_CONFIGURED:
+      *tsType = SML_TIME_STAMP_NOT_CONFIGURED;
+      break;
+    case SML_TIMESTAMP_HOURS:
+      *tsType = SML_TIME_STAMP_HOURS;
+      break;
+    case SML_TIMESTAMP_MILLI_SECONDS:
+      *tsType = SML_TIME_STAMP_MILLI_SECONDS;
+      break;
+    case SML_TIMESTAMP_NANO_SECONDS:
+      *tsType = SML_TIME_STAMP_NANO_SECONDS;
+      break;
+    case SML_TIMESTAMP_MICRO_SECONDS:
+      *tsType = SML_TIME_STAMP_MICRO_SECONDS;
+      break;
+    case SML_TIMESTAMP_SECONDS:
+      *tsType = SML_TIME_STAMP_SECONDS;
+      break;
+    case SML_TIMESTAMP_MINUTES:
+      *tsType = SML_TIME_STAMP_MINUTES;
+      break;
+    default:
+      return TSDB_CODE_TSC_INVALID_PRECISION_TYPE;
   }
 
-  int32_t len = (int32_t)strlen(precision);
-  if (len == 1) {
-    switch (precision[0]) {
-      case 'u':
-        *tsType = SML_TIME_STAMP_MICRO_SECONDS;
-        break;
-      case 's':
-        *tsType = SML_TIME_STAMP_SECONDS;
-        break;
-      case 'm':
-        *tsType = SML_TIME_STAMP_MINUTES;
-        break;
-      case 'h':
-        *tsType = SML_TIME_STAMP_HOURS;
-        break;
-      default:
-        return TSDB_CODE_TSC_INVALID_PRECISION_TYPE;
-    }
-  } else if (len == 2 && precision[1] == 's') {
-    switch (precision[0]) {
-      case 'm':
-        *tsType = SML_TIME_STAMP_MILLI_SECONDS;
-        break;
-      case 'n':
-        *tsType = SML_TIME_STAMP_NANO_SECONDS;
-        break;
-      default:
-        return TSDB_CODE_TSC_INVALID_PRECISION_TYPE;
-    }
-  } else {
-    return TSDB_CODE_TSC_INVALID_PRECISION_TYPE;
+  return TSDB_CODE_SUCCESS;
+}
+
+static SSqlObj* createSmlQueryObj(int32_t affected_rows, int32_t code) {
+  SSqlObj *pNew = (SSqlObj*)calloc(1, sizeof(SSqlObj));
+  if (pNew == NULL) {
+    return NULL;
   }
+  pNew->signature = pNew;
+  tsem_init(&pNew->rspSem, 0, 0);
+  registerSqlObj(pNew);
 
-  return TSDB_CODE_SUCCESS;
+  pNew->res.numOfRows = affected_rows;
+  pNew->res.code = code;
+
+  return pNew;
 }
 
+
 /**
  * taos_schemaless_insert() parse and insert data points into database according to
  * different protocol.
@@ -2367,39 +2367,35 @@ int32_t convertPrecisionStrType(const char* precision, SMLTimeStampType *tsType)
  *
  */
 
-int taos_schemaless_insert(TAOS* taos, char* lines[], int numLines, int protocol, const char* precision,
-                           int* affectedRows, char* msg, int msgBufLen) {
-  int code;
+TAOS_RES* taos_schemaless_insert(TAOS* taos, char* lines[], int numLines, int protocol, int precision) {
+  int code = TSDB_CODE_SUCCESS;
+  int affected_rows = 0;
   SMLTimeStampType tsType;
 
   if (protocol == SML_LINE_PROTOCOL) {
-    code = convertPrecisionStrType(precision, &tsType);
+    code = convertPrecisionType(precision, &tsType);
     if (code != TSDB_CODE_SUCCESS) {
-      if (msg != NULL) {
-        tstrncpy(msg, tstrerror(code), msgBufLen);
-      }
-      return code;
+      return NULL;
     }
   }
 
   switch (protocol) {
     case SML_LINE_PROTOCOL:
-      code = taos_insert_lines(taos, lines, numLines, protocol, tsType, affectedRows);
+      code = taos_insert_lines(taos, lines, numLines, protocol, tsType, &affected_rows);
       break;
     case SML_TELNET_PROTOCOL:
-      code = taos_insert_telnet_lines(taos, lines, numLines, protocol, tsType, affectedRows);
+      code = taos_insert_telnet_lines(taos, lines, numLines, protocol, tsType, &affected_rows);
       break;
     case SML_JSON_PROTOCOL:
-      code = taos_insert_json_payload(taos, *lines, protocol, tsType, affectedRows);
+      code = taos_insert_json_payload(taos, *lines, protocol, tsType, &affected_rows);
       break;
     default:
       code = TSDB_CODE_TSC_INVALID_PROTOCOL_TYPE;
       break;
   }
 
-  if (msg != NULL) {
-    tstrncpy(msg, tstrerror(code), msgBufLen);
-  }
 
-  return code;
+  SSqlObj *pSql = createSmlQueryObj(affected_rows, code);
+
+  return (TAOS_RES*)pSql;
 }
diff --git a/src/inc/taos.h b/src/inc/taos.h
index 089effd21b27f3d17881b0764b5c41f586bcc8f2..860a7c90545c26a769a0befb8d6668cb34f41e77 100644
--- a/src/inc/taos.h
+++ b/src/inc/taos.h
@@ -72,6 +72,22 @@ typedef enum {
   SET_CONF_RET_ERR_TOO_LONG = -6
 } SET_CONF_RET_CODE;
 
+typedef enum {
+  SML_LINE_PROTOCOL = 1,
+  SML_TELNET_PROTOCOL = 2,
+  SML_JSON_PROTOCOL = 3,
+} SML_PROTOCOL_TYPE;
+
+typedef enum {
+  SML_TIMESTAMP_NOT_CONFIGURED = 0,
+  SML_TIMESTAMP_HOURS,
+  SML_TIMESTAMP_MINUTES,
+  SML_TIMESTAMP_SECONDS,
+  SML_TIMESTAMP_MILLI_SECONDS,
+  SML_TIMESTAMP_MICRO_SECONDS,
+  SML_TIMESTAMP_NANO_SECONDS,
+} SML_TIMESTAMP_TYPE;
+
 #define RET_MSG_LENGTH 1024
 typedef struct setConfRet {
   SET_CONF_RET_CODE retCode;
@@ -188,8 +204,7 @@ DLL_EXPORT void taos_close_stream(TAOS_STREAM *tstr);
 
 DLL_EXPORT int taos_load_table_info(TAOS *taos, const char* tableNameList);
 
-DLL_EXPORT int taos_schemaless_insert(TAOS* taos, char* lines[], int numLines, int protocol, const char* precision,
-                                      int* affectedRows, char* msg, int msgBufLen);
+DLL_EXPORT TAOS_RES *taos_schemaless_insert(TAOS* taos, char* lines[], int numLines, int protocol, int precision);
 
 #ifdef __cplusplus
 }