diff --git a/source/client/src/clientSml.c b/source/client/src/clientSml.c
index 5748c06e8b..85cba9cda6 100644
--- a/source/client/src/clientSml.c
+++ b/source/client/src/clientSml.c
@@ -236,7 +236,7 @@ static void smlDestroySTableMeta(void *para) {
   taosHashCleanup(meta->colHash);
   taosArrayDestroy(meta->tags);
   taosArrayDestroy(meta->cols);
-  taosMemoryFree(meta->tableMeta);
+  taosMemoryFreeClear(meta->tableMeta);
   taosMemoryFree(meta);
 }
 
@@ -1045,6 +1045,7 @@ static int32_t smlModifyDBSchemas(SSmlHandle *info) {
       }
     }
 
+    taosMemoryFreeClear(sTableData->tableMeta);
     sTableData->tableMeta = pTableMeta;
     uDebug("SML:0x%" PRIx64 "modify schema uid:%" PRIu64 ", sversion:%d, tversion:%d", info->id, pTableMeta->uid,
            pTableMeta->sversion, pTableMeta->tversion) tmp = (SSmlSTableMeta **)taosHashIterate(info->superTables, tmp);
diff --git a/source/client/src/clientSmlJson.c b/source/client/src/clientSmlJson.c
index ad5b199c4e..0f59505f8c 100644
--- a/source/client/src/clientSmlJson.c
+++ b/source/client/src/clientSmlJson.c
@@ -696,6 +696,7 @@ static int32_t smlParseTagsFromJSON(SSmlHandle *info, cJSON *tags, SSmlLineInfo
         }
         sMeta = smlBuildSTableMeta(info->dataFormat);
         if(sMeta == NULL){
+          taosMemoryFreeClear(pTableMeta);
           return TSDB_CODE_OUT_OF_MEMORY;
         }
         sMeta->tableMeta = pTableMeta;
diff --git a/source/client/src/clientSmlLine.c b/source/client/src/clientSmlLine.c
index 4bf4ae091f..40e014458e 100644
--- a/source/client/src/clientSmlLine.c
+++ b/source/client/src/clientSmlLine.c
@@ -169,6 +169,7 @@ static int32_t smlParseTagKv(SSmlHandle *info, char **sql, char *sqlEnd, SSmlLin
         }
         sMeta = smlBuildSTableMeta(info->dataFormat);
         if(sMeta == NULL){
+          taosMemoryFreeClear(pTableMeta);
           return TSDB_CODE_OUT_OF_MEMORY;
         }
         sMeta->tableMeta = pTableMeta;
@@ -376,6 +377,7 @@ static int32_t smlParseColKv(SSmlHandle *info, char **sql, char *sqlEnd, SSmlLin
         }
         *tmp = smlBuildSTableMeta(info->dataFormat);
         if(*tmp == NULL){
+          taosMemoryFreeClear(pTableMeta);
           return TSDB_CODE_OUT_OF_MEMORY;
         }
         (*tmp)->tableMeta = pTableMeta;
diff --git a/source/client/src/clientSmlTelnet.c b/source/client/src/clientSmlTelnet.c
index 6dd8842797..b3f45a3107 100644
--- a/source/client/src/clientSmlTelnet.c
+++ b/source/client/src/clientSmlTelnet.c
@@ -92,6 +92,7 @@ static int32_t smlParseTelnetTags(SSmlHandle *info, char *data, char *sqlEnd, SS
         }
         sMeta = smlBuildSTableMeta(info->dataFormat);
         if(sMeta == NULL){
+          taosMemoryFreeClear(pTableMeta);
           return TSDB_CODE_OUT_OF_MEMORY;
         }
         sMeta->tableMeta = pTableMeta;