diff --git a/datafusion/functions-table/src/generate_series.rs b/datafusion/functions-table/src/generate_series.rs
index 84b3be4e4603..ced43ea8f00c 100644
--- a/datafusion/functions-table/src/generate_series.rs
+++ b/datafusion/functions-table/src/generate_series.rs
@@ -44,7 +44,7 @@ struct GenerateSeriesTable {
 #[derive(Debug, Clone)]
 struct GenerateSeriesState {
     schema: SchemaRef,
-    _start: i64, // Kept for display
+    start: i64, // Kept for display
     end: i64,
     batch_size: usize,
 
@@ -58,7 +58,7 @@ impl fmt::Display for GenerateSeriesState {
         write!(
             f,
             "generate_series: start={}, end={}, batch_size={}",
-            self._start, self.end, self.batch_size
+            self.start, self.end, self.batch_size
         )
     }
 }
@@ -116,7 +116,7 @@ impl TableProvider for GenerateSeriesTable {
                     self.schema.clone(),
                     vec![Arc::new(RwLock::new(GenerateSeriesState {
                         schema: self.schema.clone(),
-                        _start: start,
+                        start,
                         end,
                         current: start,
                         batch_size,
@@ -129,7 +129,7 @@ impl TableProvider for GenerateSeriesTable {
                     self.schema.clone(),
                     vec![Arc::new(RwLock::new(GenerateSeriesState {
                         schema: self.schema.clone(),
-                        _start: 0,
+                        start: 0,
                         end: 0,
                         current: 1,
                         batch_size,
diff --git a/datafusion/physical-plan/src/memory.rs b/datafusion/physical-plan/src/memory.rs
index b7f983b9adad..bf6294f5a55b 100644
--- a/datafusion/physical-plan/src/memory.rs
+++ b/datafusion/physical-plan/src/memory.rs
@@ -380,7 +380,7 @@ pub struct LazyMemoryExec {
     schema: SchemaRef,
     /// Functions to generate batches for each partition
     batch_generators: Vec<Arc<RwLock<dyn LazyBatchGenerator>>>,
-    /// Total number of rows to generate for statistics
+    /// Plan properties cache storing equivalence properties, partitioning, and execution mode
     cache: PlanProperties,
 }