diff --git a/src/query/src/qast.c b/src/query/src/qast.c
index 83a50c469d..70e4dbd803 100644
--- a/src/query/src/qast.c
+++ b/src/query/src/qast.c
@@ -798,6 +798,7 @@ static void tSQLBinaryTraverseOnSkipList(
       taosArrayPush(pResult, SL_GET_NODE_DATA(pNode));
     }
   }
+  tSkipListDestroyIter(iter);
 }
 
 
@@ -825,6 +826,8 @@ static void tQueryIndexlessColumn(SSkipList* pSkipList, tQueryInfo* pQueryInfo,
       taosArrayPush(result, (void*)&table);
     }
   }
+
+  tSkipListDestroyIter(iter);
 }
 
 
diff --git a/src/tsdb/src/tsdbRead.c b/src/tsdb/src/tsdbRead.c
index 4b565567ab..0449f42eb5 100644
--- a/src/tsdb/src/tsdbRead.c
+++ b/src/tsdb/src/tsdbRead.c
@@ -1436,6 +1436,7 @@ static int32_t doQueryTableList(STable* pSTable, SArray* pRes, tExprNode* pExpr)
 
   convertQueryResult(pRes, pTableList);
   taosArrayDestroy(pTableList);
+  free(schema);
   return TSDB_CODE_SUCCESS;
 }