From cf40c4a6edd90b27a54d6148150018e3367315a6 Mon Sep 17 00:00:00 2001
From: Andrew Lamb <andrew@nerdnetworks.org>
Date: Wed, 11 May 2022 09:24:12 -0400
Subject: [PATCH] More cleanup

---
 .../physical-expr/src/expressions/binary.rs   | 21 -------------------
 .../physical-expr/src/expressions/nullif.rs   |  9 ++------
 2 files changed, 2 insertions(+), 28 deletions(-)

diff --git a/datafusion/physical-expr/src/expressions/binary.rs b/datafusion/physical-expr/src/expressions/binary.rs
index 7b04372df3873..7248bb568994c 100644
--- a/datafusion/physical-expr/src/expressions/binary.rs
+++ b/datafusion/physical-expr/src/expressions/binary.rs
@@ -664,23 +664,6 @@ macro_rules! compute_utf8_op_dyn_scalar {
     }};
 }
 
-/// Invoke a compute kernel on a boolean data array and a scalar value
-macro_rules! compute_bool_op_scalar {
-    ($LEFT:expr, $RIGHT:expr, $OP:ident, $DT:ident) => {{
-        use std::convert::TryInto;
-        let ll = $LEFT
-            .as_any()
-            .downcast_ref::<$DT>()
-            .expect("compute_op failed to downcast array");
-        // generate the scalar function name, such as lt_scalar, from the $OP parameter
-        // (which could have a value of lt) and the suffix _scalar
-        Ok(Arc::new(paste::expr! {[<$OP _bool_scalar>]}(
-            &ll,
-            $RIGHT.try_into()?,
-        )?))
-    }};
-}
-
 /// Invoke a compute kernel on a boolean data array and a scalar value
 macro_rules! compute_bool_op_dyn_scalar {
     ($LEFT:expr, $RIGHT:expr, $OP:ident, $OP_TYPE:expr) => {{
@@ -1342,10 +1325,6 @@ fn is_not_distinct_from_null(
     make_boolean_array(length, true)
 }
 
-pub fn eq_null(left: &NullArray, _right: &NullArray) -> Result<BooleanArray> {
-    Ok((0..left.len()).into_iter().map(|_| None).collect())
-}
-
 fn make_boolean_array(length: usize, value: bool) -> Result<BooleanArray> {
     Ok((0..length).into_iter().map(|_| Some(value)).collect())
 }
diff --git a/datafusion/physical-expr/src/expressions/nullif.rs b/datafusion/physical-expr/src/expressions/nullif.rs
index d6d24cc17820b..2ef40272a8ee2 100644
--- a/datafusion/physical-expr/src/expressions/nullif.rs
+++ b/datafusion/physical-expr/src/expressions/nullif.rs
@@ -17,16 +17,11 @@
 
 use std::sync::Arc;
 
-use crate::expressions::binary::{eq_decimal, eq_decimal_scalar, eq_null};
 use arrow::array::Array;
 use arrow::array::*;
 use arrow::compute::eq_dyn;
 use arrow::compute::kernels::boolean::nullif;
-use arrow::compute::kernels::comparison::{
-    eq, eq_bool, eq_bool_scalar, eq_scalar, eq_utf8, eq_utf8_scalar,
-};
-use arrow::datatypes::{DataType, TimeUnit};
-use datafusion_common::ScalarValue;
+use arrow::datatypes::DataType;
 use datafusion_common::{DataFusionError, Result};
 use datafusion_expr::ColumnarValue;
 
@@ -108,7 +103,7 @@ pub fn nullif_func(args: &[ColumnarValue]) -> Result<ColumnarValue> {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use datafusion_common::Result;
+    use datafusion_common::{Result, ScalarValue};
 
     #[test]
     fn nullif_int32() -> Result<()> {