Minor: reduce replication for nested comparison (apache#11149)

datafusion/physical-expr-common/src/datum.rs

@@ -87,7 +87,7 @@ pub fn apply_cmp_for_nested(
 }
 
 /// Compare on nested type List, Struct, and so on
-fn compare_op_for_nested(
+pub fn compare_op_for_nested(
     op: &Operator,
     lhs: &dyn Datum,
     rhs: &dyn Datum,

datafusion/physical-plan/src/joins/hash_join.rs

@@ -52,15 +52,13 @@ use arrow::array::{
     Array, ArrayRef, BooleanArray, BooleanBufferBuilder, PrimitiveArray, UInt32Array,
     UInt64Array,
 };
-use arrow::buffer::NullBuffer;
 use arrow::compute::kernels::cmp::{eq, not_distinct};
 use arrow::compute::{and, concat_batches, take, FilterBuilder};
 use arrow::datatypes::{Schema, SchemaRef};
 use arrow::record_batch::RecordBatch;
 use arrow::util::bit_util;
 use arrow_array::cast::downcast_array;
-use arrow_ord::ord::make_comparator;
-use arrow_schema::{ArrowError, SortOptions};
+use arrow_schema::ArrowError;
 use datafusion_common::utils::memory::estimate_memory_size;
 use datafusion_common::{
     internal_datafusion_err, internal_err, plan_err, project_schema, DataFusionError,
@@ -75,6 +73,8 @@ use datafusion_physical_expr::expressions::UnKnownColumn;
 use datafusion_physical_expr::{PhysicalExpr, PhysicalExprRef};
 
 use ahash::RandomState;
+use datafusion_expr::Operator;
+use datafusion_physical_expr_common::datum::compare_op_for_nested;
 use futures::{ready, Stream, StreamExt, TryStreamExt};
 use parking_lot::Mutex;
 
@@ -1216,11 +1216,7 @@ fn eq_dyn_null(
     // implementation
     // <https://github.com/apache/datafusion/issues/10749>
     if left.data_type().is_nested() && null_equals_null {
-        let cmp = make_comparator(left, right, SortOptions::default())?;
-        let len = left.len().min(right.len());
-        let values = (0..len).map(|i| cmp(i, i).is_eq()).collect();
-        let nulls = NullBuffer::union(left.nulls(), right.nulls());
-        return Ok(BooleanArray::new(values, nulls));
+        return Ok(compare_op_for_nested(&Operator::Eq, &left, &right)?);
     }
     match (left.data_type(), right.data_type()) {
         _ if null_equals_null => not_distinct(&left, &right),