diff --git a/src/query/src/optimizer/windowed_sort.rs b/src/query/src/optimizer/windowed_sort.rs
index 4a8e184055..40e4ec1b56 100644
--- a/src/query/src/optimizer/windowed_sort.rs
+++ b/src/query/src/optimizer/windowed_sort.rs
@@ -252,6 +252,21 @@ fn is_time_index_column(
         return is_time_index_expr(projection.input().clone(), projection_expr.expr.clone());
     }
 
+    if let Some(filter) = plan.as_any().downcast_ref::<FilterExec>() {
+        let child_column_expr = filter
+            .projection()
+            .as_ref()
+            .and_then(|projection| projection.get(column_expr.index()).copied())
+            .map(|input_index| {
+                PhysicalColumn::new(
+                    filter.input().schema().field(input_index).name(),
+                    input_index,
+                )
+            })
+            .unwrap_or_else(|| column_expr.clone());
+        return is_time_index_expr(filter.input().clone(), Arc::new(child_column_expr));
+    }
+
     if let Some(region_scan_exec) = plan.as_any().downcast_ref::<RegionScanExec>() {
         let schema = plan.schema();
         let column_field = schema.field(column_expr.index());
@@ -268,17 +283,21 @@ fn is_time_index_column(
 }
 
 fn passthrough_child(plan: &dyn ExecutionPlan) -> Option<Arc<dyn ExecutionPlan>> {
-    if plan.as_any().is::<FilterExec>()
-        || plan.as_any().is::<CoalescePartitionsExec>()
+    if plan.as_any().is::<CoalescePartitionsExec>()
         || plan.as_any().is::<RepartitionExec>()
         || plan.as_any().is::<CooperativeExec>()
     {
-        return plan.children().first().cloned().cloned();
+        return schema_preserving_child(plan);
     }
 
     None
 }
 
+fn schema_preserving_child(plan: &dyn ExecutionPlan) -> Option<Arc<dyn ExecutionPlan>> {
+    let child = plan.children().first().cloned().cloned()?;
+    (plan.schema().as_ref() == child.schema().as_ref()).then_some(child)
+}
+
 fn is_supported_time_index_wrapper(expr: &ScalarFunctionExpr) -> bool {
     matches!(
         expr.name(),
@@ -319,8 +338,10 @@ mod test {
     use arrow_schema::{Field, TimeUnit};
     use common_recordbatch::RecordBatches;
     use datafusion::config::ConfigOptions;
+    use datafusion::physical_plan::filter::FilterExecBuilder;
+    use datafusion_common::ScalarValue;
     use datafusion_functions::datetime::to_timestamp_millis;
-    use datafusion_physical_expr::expressions::CastExpr;
+    use datafusion_physical_expr::expressions::{CastExpr, Literal};
     use datatypes::data_type::ConcreteDataType;
     use datatypes::schema::{ColumnSchema, Schema};
     use store_api::metadata::{ColumnMetadata, RegionMetadataBuilder};
@@ -478,6 +499,95 @@ mod test {
         assert!(!is_time_index_expr(scan, Arc::new(non_timestamp_cast)).unwrap());
     }
 
+    #[test]
+    fn test_is_time_index_expr_tracks_time_index_through_filter() {
+        let scan = new_region_scan();
+        let filter = Arc::new(
+            FilterExec::try_new(
+                Arc::new(Literal::new(ScalarValue::Boolean(Some(true)))),
+                scan,
+            )
+            .unwrap(),
+        ) as Arc<dyn ExecutionPlan>;
+
+        assert!(is_time_index_expr(filter, Arc::new(PhysicalColumn::new("ts", 1))).unwrap());
+    }
+
+    #[test]
+    fn test_is_time_index_expr_tracks_time_index_through_passthrough_wrapper_and_filter_projection()
+    {
+        let scan = new_region_scan();
+        let projected_filter = Arc::new(
+            FilterExecBuilder::new(
+                Arc::new(Literal::new(ScalarValue::Boolean(Some(true)))),
+                scan,
+            )
+            .apply_projection(Some(vec![1]))
+            .unwrap()
+            .build()
+            .unwrap(),
+        ) as Arc<dyn ExecutionPlan>;
+        let cooperative =
+            Arc::new(CooperativeExec::new(projected_filter)) as Arc<dyn ExecutionPlan>;
+
+        assert!(is_time_index_expr(cooperative, Arc::new(PhysicalColumn::new("ts", 0))).unwrap());
+    }
+
+    #[test]
+    fn test_schema_preserving_child_rejects_schema_changing_projection() {
+        let scan = new_region_scan();
+        let projection = ProjectionExec::try_new(
+            vec![(
+                Arc::new(PhysicalColumn::new("ts", 1)) as Arc<dyn PhysicalExpr>,
+                "ts".to_string(),
+            )],
+            scan,
+        )
+        .unwrap();
+
+        assert!(schema_preserving_child(&projection).is_none());
+    }
+
+    #[test]
+    fn test_cooperative_exec_satisfies_passthrough_schema_contract() {
+        let child = new_region_scan();
+        let plan = Arc::new(CooperativeExec::new(child.clone())) as Arc<dyn ExecutionPlan>;
+
+        assert_passthrough_schema_contract(plan, child);
+    }
+
+    #[test]
+    fn test_repartition_exec_satisfies_passthrough_schema_contract() {
+        let child = new_region_scan();
+        let plan = Arc::new(
+            RepartitionExec::try_new(
+                child.clone(),
+                datafusion_physical_expr::Partitioning::RoundRobinBatch(2),
+            )
+            .unwrap(),
+        ) as Arc<dyn ExecutionPlan>;
+
+        assert_passthrough_schema_contract(plan, child);
+    }
+
+    #[test]
+    fn test_coalesce_partitions_exec_satisfies_passthrough_schema_contract() {
+        let child = new_region_scan();
+        let plan = Arc::new(CoalescePartitionsExec::new(child.clone())) as Arc<dyn ExecutionPlan>;
+
+        assert_passthrough_schema_contract(plan, child);
+    }
+
+    fn assert_passthrough_schema_contract(
+        plan: Arc<dyn ExecutionPlan>,
+        child: Arc<dyn ExecutionPlan>,
+    ) {
+        assert_eq!(plan.schema().as_ref(), child.schema().as_ref());
+
+        let passthrough = passthrough_child(plan.as_ref()).expect("wrapper should preserve schema");
+        assert_eq!(passthrough.schema().as_ref(), child.schema().as_ref());
+    }
+
     fn new_region_scan() -> Arc<dyn ExecutionPlan> {
         let schema = Arc::new(Schema::new(vec![
             ColumnSchema::new("value", ConcreteDataType::int32_datatype(), false),