diff --git a/source/libs/executor/src/executorimpl.c b/source/libs/executor/src/executorimpl.c
index 9dd028eeb77dc386ee95cad80c53d99c6525397a..e52cbf40a9470bf9a8ee6e725a94240e9ba63493 100644
--- a/source/libs/executor/src/executorimpl.c
+++ b/source/libs/executor/src/executorimpl.c
@@ -672,7 +672,7 @@ int32_t projectApplyFunctions(SExprInfo* pExpr, SSDataBlock* pResult, SSDataBloc
 
         numOfRows = pfCtx->fpSet.process(pfCtx);
       } else if (fmIsAggFunc(pfCtx->functionId)) {
-        // diff/derivative selective value should be set during function execution
+        // selective value output should be set during corresponding function execution
         if (fmIsSelectValueFunc(pfCtx->functionId)) {
           continue;
         }