diff --git a/source/libs/executor/src/timewindowoperator.c b/source/libs/executor/src/timewindowoperator.c
index e5369d30cf980391cf4521ae10b1d38e6bdb53ef..991bbe525db2c24cde65b62b6f0fd3b709db7d64 100644
--- a/source/libs/executor/src/timewindowoperator.c
+++ b/source/libs/executor/src/timewindowoperator.c
@@ -93,6 +93,7 @@ static STimeWindow getFirstQualifiedTimeWindow(int64_t ts, STimeWindow* pWindow,
   return save;
 }
 
+// todo do refactor
 // get the correct time window according to the handled timestamp
 STimeWindow getActiveTimeWindow(SDiskbasedBuf* pBuf, SResultRowInfo* pResultRowInfo, int64_t ts, SInterval* pInterval,
                                 int32_t precision, int32_t order) {