sort out codes of single column group by.

datafusion/physical-plan/src/aggregates/group_values/mod.rs

@@ -20,24 +20,26 @@
 use arrow::record_batch::RecordBatch;
 use arrow_array::{downcast_primitive, ArrayRef};
 use arrow_schema::{DataType, SchemaRef};
-use bytes_view::GroupValuesBytesView;
 use datafusion_common::Result;
 
-pub(crate) mod primitive;
 use datafusion_expr::EmitTo;
-use primitive::GroupValuesPrimitive;
 
 mod multi_column;
 mod row;
+mod single_column;
+use datafusion_physical_expr::binary_map::OutputType;
 use multi_column::GroupValuesColumn;
 use row::GroupValuesRows;
 
-mod bytes;
-mod bytes_view;
-use bytes::GroupValuesByes;
-use datafusion_physical_expr::binary_map::OutputType;
+pub(crate) use single_column::primitive::HashValue;
 
-use crate::aggregates::order::GroupOrdering;
+use crate::aggregates::{
+    group_values::single_column::{
+        bytes::GroupValuesByes, bytes_view::GroupValuesBytesView,
+        primitive::GroupValuesPrimitive,
+    },
+    order::GroupOrdering,
+};
 
 mod null_builder;
 

datafusion/physical-plan/src/aggregates/group_values/single_column/mod.rs

@@ -0,0 +1,20 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+pub(crate) mod bytes;
+pub(crate) mod bytes_view;
+pub(crate) mod primitive;

datafusion/physical-plan/src/aggregates/topk/hash_table.rs

@@ -17,7 +17,7 @@
 
 //! A wrapper around `hashbrown::RawTable` that allows entries to be tracked by index
 
-use crate::aggregates::group_values::primitive::HashValue;
+use crate::aggregates::group_values::HashValue;
 use crate::aggregates::topk::heap::Comparable;
 use ahash::RandomState;
 use arrow::datatypes::i256;