From df8699b129f37a198ee801a8faf6609f575a59d2 Mon Sep 17 00:00:00 2001
From: eitsupi <50911393+eitsupi@users.noreply.github.com>
Date: Mon, 14 Oct 2024 15:26:25 +0900
Subject: [PATCH] fix(rust): Implement is_nested_null for Null Array (#19219)

---
 crates/polars-core/src/datatypes/any_value.rs | 2 ++
 crates/polars-core/src/datatypes/dtype.rs     | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/crates/polars-core/src/datatypes/any_value.rs b/crates/polars-core/src/datatypes/any_value.rs
index 4155a9bf14e9..edf76969e976 100644
--- a/crates/polars-core/src/datatypes/any_value.rs
+++ b/crates/polars-core/src/datatypes/any_value.rs
@@ -528,6 +528,8 @@ impl<'a> AnyValue<'a> {
         match self {
             AnyValue::Null => true,
             AnyValue::List(s) => s.null_count() == s.len(),
+            #[cfg(feature = "dtype-array")]
+            AnyValue::Array(s, _) => s.null_count() == s.len(),
             #[cfg(feature = "dtype-struct")]
             AnyValue::Struct(_, _, _) => self._iter_struct_av().all(|av| av.is_nested_null()),
             _ => false,
diff --git a/crates/polars-core/src/datatypes/dtype.rs b/crates/polars-core/src/datatypes/dtype.rs
index cd79349bfcd8..e18dd9026a4d 100644
--- a/crates/polars-core/src/datatypes/dtype.rs
+++ b/crates/polars-core/src/datatypes/dtype.rs
@@ -648,6 +648,8 @@ impl DataType {
         match self {
             Null => true,
             List(field) => field.is_nested_null(),
+            #[cfg(feature = "dtype-array")]
+            Array(field, _) => field.is_nested_null(),
             #[cfg(feature = "dtype-struct")]
             Struct(fields) => fields.iter().all(|fld| fld.dtype.is_nested_null()),
             _ => false,