diff --git a/native/core/benches/cast_from_string.rs b/native/core/benches/cast_from_string.rs
index efc7987c5..51410a68a 100644
--- a/native/core/benches/cast_from_string.rs
+++ b/native/core/benches/cast_from_string.rs
@@ -75,8 +75,8 @@ fn create_utf8_batch() -> RecordBatch {
         }
     }
     let array = b.finish();
-    let batch = RecordBatch::try_new(schema.clone(), vec![Arc::new(array)]).unwrap();
-    batch
+
+    RecordBatch::try_new(schema.clone(), vec![Arc::new(array)]).unwrap()
 }
 
 fn config() -> Criterion {
diff --git a/native/core/benches/cast_numeric.rs b/native/core/benches/cast_numeric.rs
index f9ed1fae2..dc0ceea79 100644
--- a/native/core/benches/cast_numeric.rs
+++ b/native/core/benches/cast_numeric.rs
@@ -63,8 +63,8 @@ fn create_int32_batch() -> RecordBatch {
         }
     }
     let array = b.finish();
-    let batch = RecordBatch::try_new(schema.clone(), vec![Arc::new(array)]).unwrap();
-    batch
+
+    RecordBatch::try_new(schema.clone(), vec![Arc::new(array)]).unwrap()
 }
 
 fn config() -> Criterion {
diff --git a/native/core/benches/shuffle_writer.rs b/native/core/benches/shuffle_writer.rs
index 4bebd045d..6f2871861 100644
--- a/native/core/benches/shuffle_writer.rs
+++ b/native/core/benches/shuffle_writer.rs
@@ -65,8 +65,8 @@ fn create_batch() -> RecordBatch {
         }
     }
     let array = b.finish();
-    let batch = RecordBatch::try_new(schema.clone(), vec![Arc::new(array)]).unwrap();
-    batch
+
+    RecordBatch::try_new(schema.clone(), vec![Arc::new(array)]).unwrap()
 }
 
 fn config() -> Criterion {
diff --git a/native/core/src/errors.rs b/native/core/src/errors.rs
index 3ed402d1a..92799bcf6 100644
--- a/native/core/src/errors.rs
+++ b/native/core/src/errors.rs
@@ -778,7 +778,7 @@ mod tests {
         _class: JClass,
         input: JString,
     ) -> jstring {
-        try_unwrap_or_throw(&e, |mut env| {
+        try_unwrap_or_throw(e, |mut env| {
             let input: String = env
                 .get_string(&input)
                 .expect("Couldn't get java string!")
diff --git a/native/core/src/execution/datafusion/spark_hash.rs b/native/core/src/execution/datafusion/spark_hash.rs
index 15bded3a8..e429f5439 100644
--- a/native/core/src/execution/datafusion/spark_hash.rs
+++ b/native/core/src/execution/datafusion/spark_hash.rs
@@ -686,7 +686,7 @@ mod tests {
 
     #[test]
     fn test_str() {
-        let input = vec![
+        let input = [
             "hello", "bar", "", "😁", "天地", "a", "ab", "abc", "abcd", "abcde",
         ]
         .iter()
diff --git a/native/core/src/parquet/read/values.rs b/native/core/src/parquet/read/values.rs
index 8eae330a5..b89face0f 100644
--- a/native/core/src/parquet/read/values.rs
+++ b/native/core/src/parquet/read/values.rs
@@ -1184,7 +1184,7 @@ mod test {
         let expected = hex::decode("8adb1834301dab37f1").unwrap();
         let num = source.len() / 4;
         let mut dest: Vec<u8> = vec![b' '; num];
-        copy_i32_to_i8(&source.as_bytes(), dest.as_mut_slice(), num);
+        copy_i32_to_i8(source.as_bytes(), dest.as_mut_slice(), num);
         assert_eq!(expected.as_bytes(), dest.as_bytes());
     }
 
@@ -1196,7 +1196,7 @@ mod test {
         let expected = hex::decode("8a00db001800340030001d00ab003700f100").unwrap();
         let num = source.len() / 4;
         let mut dest: Vec<u8> = vec![b' '; num * 2];
-        copy_i32_to_u8(&source.as_bytes(), dest.as_mut_slice(), num);
+        copy_i32_to_u8(source.as_bytes(), dest.as_mut_slice(), num);
         assert_eq!(expected.as_bytes(), dest.as_bytes());
     }
 
@@ -1208,7 +1208,7 @@ mod test {
         let expected = hex::decode("8a0edb93182634f430021d2babe3378df147").unwrap();
         let num = source.len() / 4;
         let mut dest: Vec<u8> = vec![b' '; num * 2];
-        copy_i32_to_i16(&source.as_bytes(), dest.as_mut_slice(), num);
+        copy_i32_to_i16(source.as_bytes(), dest.as_mut_slice(), num);
         assert_eq!(expected.as_bytes(), dest.as_bytes());
     }
 
@@ -1224,7 +1224,7 @@ mod test {
         .unwrap();
         let num = source.len() / 4;
         let mut dest: Vec<u8> = vec![b' '; num * 4];
-        copy_i32_to_u16(&source.as_bytes(), dest.as_mut_slice(), num);
+        copy_i32_to_u16(source.as_bytes(), dest.as_mut_slice(), num);
         assert_eq!(expected.as_bytes(), dest.as_bytes());
     }
 
@@ -1237,7 +1237,7 @@ mod test {
         let expected = hex::decode("ffffff7f00000000000000800000000001000080000000000200008000000000030000800000000004000080000000000500008000000000060000800000000007000080000000000800008000000000").unwrap();
         let num = source.len() / 4;
         let mut dest: Vec<u8> = vec![b' '; num * 8];
-        copy_i32_to_u32(&source.as_bytes(), dest.as_mut_slice(), num);
+        copy_i32_to_u32(source.as_bytes(), dest.as_mut_slice(), num);
         assert_eq!(expected.as_bytes(), dest.as_bytes());
     }
 }
diff --git a/native/spark-expr/src/cast.rs b/native/spark-expr/src/cast.rs
index 8702ce707..9a47cc873 100644
--- a/native/spark-expr/src/cast.rs
+++ b/native/spark-expr/src/cast.rs
@@ -1854,7 +1854,7 @@ mod tests {
             "2020-01-01T",
         ] {
             for eval_mode in &[EvalMode::Legacy, EvalMode::Ansi, EvalMode::Try] {
-                assert_eq!(date_parser(*date, *eval_mode).unwrap(), Some(18262));
+                assert_eq!(date_parser(date, *eval_mode).unwrap(), Some(18262));
             }
         }
 
@@ -1875,14 +1875,14 @@ mod tests {
             "--262143-12-31 ",
         ] {
             for eval_mode in &[EvalMode::Legacy, EvalMode::Try] {
-                assert_eq!(date_parser(*date, *eval_mode).unwrap(), None);
+                assert_eq!(date_parser(date, *eval_mode).unwrap(), None);
             }
-            assert!(date_parser(*date, EvalMode::Ansi).is_err());
+            assert!(date_parser(date, EvalMode::Ansi).is_err());
         }
 
         for date in &["-3638-5"] {
             for eval_mode in &[EvalMode::Legacy, EvalMode::Try, EvalMode::Ansi] {
-                assert_eq!(date_parser(*date, *eval_mode).unwrap(), Some(-2048160));
+                assert_eq!(date_parser(date, *eval_mode).unwrap(), Some(-2048160));
             }
         }
 
@@ -1898,7 +1898,7 @@ mod tests {
             "-0973250",
         ] {
             for eval_mode in &[EvalMode::Legacy, EvalMode::Try, EvalMode::Ansi] {
-                assert_eq!(date_parser(*date, *eval_mode).unwrap(), None);
+                assert_eq!(date_parser(date, *eval_mode).unwrap(), None);
             }
         }
     }
diff --git a/native/spark-expr/src/kernels/temporal.rs b/native/spark-expr/src/kernels/temporal.rs
index 6f2474e8d..cda4bef5d 100644
--- a/native/spark-expr/src/kernels/temporal.rs
+++ b/native/spark-expr/src/kernels/temporal.rs
@@ -838,7 +838,7 @@ mod tests {
                         assert!(array.values().get(i) >= a.values().get(i))
                     }
                 }
-                _ => assert!(false),
+                _ => unreachable!(),
             }
         }
     }
@@ -854,9 +854,9 @@ mod tests {
         let mut vec: Vec<i32> = Vec::with_capacity(size * formats.len());
         let mut fmt_vec: Vec<&str> = Vec::with_capacity(size * formats.len());
         for i in 0..size {
-            for j in 0..formats.len() {
+            for fmt_value in &formats {
                 vec.push(i as i32 * 1_000_001);
-                fmt_vec.push(formats[j]);
+                fmt_vec.push(fmt_value);
             }
         }
 
@@ -928,7 +928,7 @@ mod tests {
                 )
             }
         } else {
-            assert!(false)
+            unreachable!()
         }
         if let Ok(a) = date_trunc_array_fmt_dyn(&array_dict, &fmt_array) {
             for i in 0..array.len() {
@@ -937,7 +937,7 @@ mod tests {
                 )
             }
         } else {
-            assert!(false)
+            unreachable!()
         }
         if let Ok(a) = date_trunc_array_fmt_dyn(&array, &fmt_dict) {
             for i in 0..array.len() {
@@ -946,7 +946,7 @@ mod tests {
                 )
             }
         } else {
-            assert!(false)
+            unreachable!()
         }
         if let Ok(a) = date_trunc_array_fmt_dyn(&array_dict, &fmt_dict) {
             for i in 0..array.len() {
@@ -955,7 +955,7 @@ mod tests {
                 )
             }
         } else {
-            assert!(false)
+            unreachable!()
         }
     }
 
@@ -991,7 +991,7 @@ mod tests {
                         assert!(array.values().get(i) >= a.values().get(i))
                     }
                 }
-                _ => assert!(false),
+                _ => unreachable!(),
             }
         }
     }
@@ -1023,9 +1023,9 @@ mod tests {
         let mut vec: Vec<i64> = Vec::with_capacity(size * formats.len());
         let mut fmt_vec: Vec<&str> = Vec::with_capacity(size * formats.len());
         for i in 0..size {
-            for j in 0..formats.len() {
+            for fmt_value in &formats {
                 vec.push(i as i64 * 1_000_000_001);
-                fmt_vec.push(formats[j]);
+                fmt_vec.push(fmt_value);
             }
         }
 
@@ -1103,7 +1103,7 @@ mod tests {
                 )
             }
         } else {
-            assert!(false)
+            unreachable!()
         }
         if let Ok(a) = timestamp_trunc_array_fmt_dyn(&array_dict, &fmt_array) {
             for i in 0..array.len() {
@@ -1116,7 +1116,7 @@ mod tests {
                 )
             }
         } else {
-            assert!(false)
+            unreachable!()
         }
         if let Ok(a) = timestamp_trunc_array_fmt_dyn(&array, &fmt_dict) {
             for i in 0..array.len() {
@@ -1129,7 +1129,7 @@ mod tests {
                 )
             }
         } else {
-            assert!(false)
+            unreachable!()
         }
         if let Ok(a) = timestamp_trunc_array_fmt_dyn(&array_dict, &fmt_dict) {
             for i in 0..array.len() {
@@ -1142,7 +1142,7 @@ mod tests {
                 )
             }
         } else {
-            assert!(false)
+            unreachable!()
         }
     }
 }