alamb commented on code in PR #2645: URL: https://github.com/apache/arrow-datafusion/pull/2645#discussion_r884805160
########## datafusion/core/src/physical_plan/sorts/index.rs: ########## @@ -0,0 +1,59 @@ +// 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. + +/// A `RowIndex` identifies a specific row in a logical stream. +/// +/// Each stream is identified by an `stream_idx` and is formed from a +/// sequence of RecordBatches batches, each of which is identified by +/// a unique `batch_idx` within that stream. +/// +/// This is used by `SortPreservingMergeStream` to identify which +/// the order of the tuples in the final sorted output stream. +/// +/// ```text Review Comment: that is an excellent point -- updated in 93668d2208 ########## datafusion/core/src/physical_plan/sorts/index.rs: ########## @@ -0,0 +1,59 @@ +// 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. + +/// A `RowIndex` identifies a specific row in a logical stream. +/// +/// Each stream is identified by an `stream_idx` and is formed from a +/// sequence of RecordBatches batches, each of which is identified by +/// a unique `batch_idx` within that stream. +/// +/// This is used by `SortPreservingMergeStream` to identify which +/// the order of the tuples in the final sorted output stream. +/// +/// ```text +/// ┌────┐ ┌────┐ ┌────┐ RecordBatch +/// │ │ │ │ │ │ +/// │ C1 │ │... │ │ CN │◀─────── (batch_idx = 0) +/// │ │ │ │ │ │ +/// └────┘ └────┘ └────┘ +/// +/// ┌────┐ ┌────┐ ┌────┐ RecordBatch +/// │ │ │ │ │ │ +/// │ C1 │ │... │ │ CN │◀─────── (batch_idx = 1) +/// │ │ │ │ │ │ +/// └────┘ └────┘ └────┘ +/// +/// ... +/// +/// ┌────┐ ┌────┐ ┌────┐ RecordBatch +/// │ │ │ │ │ │ +/// │ C1 │ │... │ │ CN │◀────── (batch_idx = N-1) Review Comment: in 93668d2208 👍 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
