minor change to fill.rs
+// Copyright 2020-2021 The Datafuse Authors.
+//
+// SPDX-License-Identifier: Apache-2.0.
+
use common_exception::Result;
use crate::arrays::builders::Utf8ArrayBuilder;
@@ -9,16 +13,12 @@ use crate::DFListArray;
use crate::DFPrimitiveType;
use crate::DFUtf8Array;
-// Copyright 2020-2021 The Datafuse Authors.
-//
-// SPDX-License-Identifier: Apache-2.0.
-
#[derive(Copy, Clone, Debug)]
pub enum FillNoneStrategy {
/// previous value in array
- Backward,
- /// next value in array
Forward,
+ /// next value in array
+ Backward,
/// mean value of array
Mean,
/// minimal value in array
