diff --git a/source/libs/executor/src/timewindowoperator.c b/source/libs/executor/src/timewindowoperator.c
index a14f554cf5..356c11af82 100644
--- a/source/libs/executor/src/timewindowoperator.c
+++ b/source/libs/executor/src/timewindowoperator.c
@@ -2375,6 +2375,8 @@ SOperatorInfo* createTimeSliceOperatorInfo(SOperatorInfo* downstream, SPhysiNode
   pOperator->fpSet =
       createOperatorFpSet(operatorDummyOpenFn, doTimeslice, NULL, NULL, destroyBasicOperatorInfo, NULL, NULL, NULL);
 
+  blockDataEnsureCapacity(pInfo->pRes, pOperator->resultInfo.capacity);
+
   code = appendDownstream(pOperator, &downstream, 1);
   return pOperator;
 
diff --git a/source/libs/function/src/builtins.c b/source/libs/function/src/builtins.c
index dd84535eac..49c37fc24f 100644
--- a/source/libs/function/src/builtins.c
+++ b/source/libs/function/src/builtins.c
@@ -2246,7 +2246,7 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
   {
     .name = "derivative",
     .type = FUNCTION_TYPE_DERIVATIVE,
-    .classification = FUNC_MGT_INDEFINITE_ROWS_FUNC | FUNC_MGT_SELECT_FUNC | FUNC_MGT_TIMELINE_FUNC | FUNC_MGT_IMPLICIT_TS_FUNC | 
+    .classification = FUNC_MGT_INDEFINITE_ROWS_FUNC | FUNC_MGT_SELECT_FUNC | FUNC_MGT_TIMELINE_FUNC | FUNC_MGT_IMPLICIT_TS_FUNC |
                       FUNC_MGT_KEEP_ORDER_FUNC | FUNC_MGT_CUMULATIVE_FUNC | FUNC_MGT_FORBID_STREAM_FUNC,
     .translateFunc = translateDerivative,
     .getEnvFunc   = getDerivativeFuncEnv,