diff --git a/src/client/src/tscParseLineProtocol.c b/src/client/src/tscParseLineProtocol.c
index 64b37205bad9952aa3c73513595904179523dee8..7d05601b50a00633f47df8c507059b0886457e10 100644
--- a/src/client/src/tscParseLineProtocol.c
+++ b/src/client/src/tscParseLineProtocol.c
@@ -1892,7 +1892,7 @@ static int32_t parseSmlKey(TAOS_SML_KV *pKV, const char **index, SHashObj *pHash
     return TSDB_CODE_TSC_LINE_SYNTAX_ERROR;
   }
   while (*cur != '\0') {
-    if (len >= TSDB_COL_NAME_LEN - 1) {
+    if (len > TSDB_COL_NAME_LEN - 1) {
       tscError("SML:0x%"PRIx64" Key field cannot exceeds %d characters", info->id, TSDB_COL_NAME_LEN - 1);
       return TSDB_CODE_TSC_INVALID_COLUMN_LENGTH;
     }
@@ -1992,7 +1992,7 @@ static int32_t parseSmlMeasurement(TAOS_SML_DATA_POINT *pSml, const char **index
   }
 
   while (*cur != '\0') {
-    if (len >= TSDB_TABLE_NAME_LEN - 1) {
+    if (len > TSDB_TABLE_NAME_LEN - 1) {
       tscError("SML:0x%"PRIx64" Measurement field cannot exceeds %d characters", info->id, TSDB_TABLE_NAME_LEN - 1);
       free(pSml->stableName);
       pSml->stableName = NULL;
diff --git a/src/client/src/tscParseOpenTSDB.c b/src/client/src/tscParseOpenTSDB.c
index 3024bb9c6ecfb69d0a65e081183f1954eedf3404..9ae519ad8456316b0a0eff9fbab018eeb27fc467 100644
--- a/src/client/src/tscParseOpenTSDB.c
+++ b/src/client/src/tscParseOpenTSDB.c
@@ -48,7 +48,7 @@ static int32_t parseTelnetMetric(TAOS_SML_DATA_POINT *pSml, const char **index,
   }
 
   while (*cur != '\0') {
-    if (len >= TSDB_TABLE_NAME_LEN - 1) {
+    if (len > TSDB_TABLE_NAME_LEN - 1) {
       tscError("OTD:0x%"PRIx64" Metric cannot exceeds %d characters", info->id, TSDB_TABLE_NAME_LEN - 1);
       tfree(pSml->stableName);
       return TSDB_CODE_TSC_INVALID_TABLE_ID_LENGTH;
@@ -192,7 +192,7 @@ static int32_t parseTelnetTagKey(TAOS_SML_KV *pKV, const char **index, SHashObj
     return TSDB_CODE_TSC_LINE_SYNTAX_ERROR;
   }
   while (*cur != '\0') {
-    if (len >= TSDB_COL_NAME_LEN - 1) {
+    if (len > TSDB_COL_NAME_LEN - 1) {
       tscError("OTD:0x%"PRIx64" Tag key cannot exceeds %d characters", info->id, TSDB_COL_NAME_LEN - 1);
       return TSDB_CODE_TSC_INVALID_COLUMN_LENGTH;
     }