From 1edf4f00513bdd34b73e59cc11a04a99e93a3404 Mon Sep 17 00:00:00 2001
From: Andrew Lamb <andrew@nerdnetworks.org>
Date: Thu, 1 Feb 2024 12:12:22 -0500
Subject: [PATCH] improve module comments

---
 .../physical-expr/src/aggregate/count_distinct/native.rs    | 5 +++++
 .../physical-expr/src/aggregate/count_distinct/strings.rs   | 6 +++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/datafusion/physical-expr/src/aggregate/count_distinct/native.rs b/datafusion/physical-expr/src/aggregate/count_distinct/native.rs
index e40fdb3301d7..a44e8b772e5a 100644
--- a/datafusion/physical-expr/src/aggregate/count_distinct/native.rs
+++ b/datafusion/physical-expr/src/aggregate/count_distinct/native.rs
@@ -15,6 +15,11 @@
 // specific language governing permissions and limitations
 // under the License.
 
+//! Specialized implementation of `COUNT DISTINCT` for "Native" arrays such as
+//! [`Int64Array`] and [`Float64Array`]
+//!
+//! [`Int64Array`]: arrow::array::Int64Array
+//! [`Float64Array`]: arrow::array::Float64Array
 use std::cmp::Eq;
 use std::collections::HashSet;
 use std::fmt::Debug;
diff --git a/datafusion/physical-expr/src/aggregate/count_distinct/strings.rs b/datafusion/physical-expr/src/aggregate/count_distinct/strings.rs
index d7a9ea5c373d..02d30c350623 100644
--- a/datafusion/physical-expr/src/aggregate/count_distinct/strings.rs
+++ b/datafusion/physical-expr/src/aggregate/count_distinct/strings.rs
@@ -15,7 +15,11 @@
 // specific language governing permissions and limitations
 // under the License.
 
-//! Specialized implementation of `COUNT DISTINCT` for `StringArray` and `LargeStringArray`
+//! Specialized implementation of `COUNT DISTINCT` for [`StringArray`]
+//! and [`LargeStringArray`]
+//!
+//! [`StringArray`]: arrow::array::StringArray
+//! [`LargeStringArray`]: arrow::array::LargeStringArray
 
 use ahash::RandomState;
 use arrow_array::cast::AsArray;