diff --git a/source/client/src/clientSml.c b/source/client/src/clientSml.c
index e0d3a4d61a..cce33d02ed 100644
--- a/source/client/src/clientSml.c
+++ b/source/client/src/clientSml.c
@@ -1082,7 +1082,8 @@ void smlDestroyInfo(SSmlHandle *info) {
       if (info->parseJsonByLib) {
         taosMemoryFree(info->lines[i].tags);
       }
-      taosMemoryFree(info->lines[i].measureTag);
+      if(info->lines[i].measureTagsLen != 0)
+        taosMemoryFree(info->lines[i].measureTag);
     }
     taosMemoryFree(info->lines);
   }
diff --git a/source/client/src/clientSmlJson.c b/source/client/src/clientSmlJson.c
index c6acdc5b91..82d4888757 100644
--- a/source/client/src/clientSmlJson.c
+++ b/source/client/src/clientSmlJson.c
@@ -812,6 +812,7 @@ static int32_t smlParseTagsFromJSON(SSmlHandle *info, cJSON *tags, SSmlLineInfo
   elements->measureTag = (char*)taosMemoryMalloc(elements->measureLen + elements->tagsLen);
   memcpy(elements->measureTag, elements->measure, elements->measureLen);
   memcpy(elements->measureTag + elements->measureLen, elements->tags, elements->tagsLen);
+  elements->measureTagsLen = elements->measureLen + elements->tagsLen;
 
   SSmlTableInfo **tmp = (SSmlTableInfo **)taosHashGet(info->childTables, elements->measureTag, elements->measureLen + elements->tagsLen);
   SSmlTableInfo *tinfo = NULL;
@@ -1018,6 +1019,8 @@ static int32_t smlParseJSONStringExt(SSmlHandle *info, cJSON *root, SSmlLineInfo
       elements->tags = NULL;
       return ret;
     }
+  }else{
+    elements->measureTag = info->preLine.measureTag;
   }
 
   if(needFree){
@@ -1196,6 +1199,8 @@ static int32_t smlParseJSONString(SSmlHandle *info, char **start, SSmlLineInfo *
       uError("OTD:0x%" PRIx64 " Unable to parse tags from JSON payload", info->id);
       return ret;
     }
+  }else{
+    elements->measureTag = info->preLine.measureTag;
   }
 
   if(unlikely(info->reRun)){
diff --git a/source/client/src/clientSmlTelnet.c b/source/client/src/clientSmlTelnet.c
index 2b55a5875b..7f669ffead 100644
--- a/source/client/src/clientSmlTelnet.c
+++ b/source/client/src/clientSmlTelnet.c
@@ -71,6 +71,7 @@ static void smlParseTelnetElement(char **sql, char *sqlEnd, char **data, int32_t
 
 static int32_t smlParseTelnetTags(SSmlHandle *info, char *data, char *sqlEnd, SSmlLineInfo *elements, SSmlMsgBuf *msg) {
   if(is_same_child_table_telnet(elements, &info->preLine) == 0){
+    elements->measureTag = info->preLine.measureTag;
     return TSDB_CODE_SUCCESS;
   }
 
@@ -234,6 +235,7 @@ static int32_t smlParseTelnetTags(SSmlHandle *info, char *data, char *sqlEnd, SS
   elements->measureTag = (char*)taosMemoryMalloc(elements->measureLen + elements->tagsLen);
   memcpy(elements->measureTag, elements->measure, elements->measureLen);
   memcpy(elements->measureTag + elements->measureLen, elements->tags, elements->tagsLen);
+  elements->measureTagsLen = elements->measureLen + elements->tagsLen;
 
   SSmlTableInfo **tmp = (SSmlTableInfo **)taosHashGet(info->childTables, elements->measureTag, elements->measureLen + elements->tagsLen);
   SSmlTableInfo *tinfo = NULL;