yiguolei commented on code in PR #48720: URL: https://github.com/apache/doris/pull/48720#discussion_r2700941093
########## be/src/pipeline/shuffle/exchange_writer.h: ########## @@ -0,0 +1,89 @@ +// 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. + +#pragma once + +#include <cstdint> + +#include "vec/sink/vdata_stream_sender.h" + +namespace doris { +class RuntimeState; +class Status; +namespace vectorized { +class Block; +class Channel; +} // namespace vectorized +namespace pipeline { + +#include "common/compile_check_begin.h" +class ExchangeSinkLocalState; + +class ExchangeWriterBase { +public: + ExchangeWriterBase() = default; + +protected: + template <typename ChannelPtrType> + Status _handle_eof_channel(RuntimeState* state, ChannelPtrType channel, Status st) const; + Status _add_rows_impl(RuntimeState* state, + std::vector<std::shared_ptr<vectorized::Channel>>& channels, + size_t channel_count, vectorized::Block* block, bool eos); + + // _origin_row_idx[i]: row id in original block for the i-th's data we send. + vectorized::PaddedPODArray<uint32_t> _origin_row_idx; + // _channel_rows_histogram[i]: number of rows for channel i in current batch + vectorized::PaddedPODArray<uint32_t> _channel_rows_histogram; + // _channel_start_offsets[i]: the start offset of channel i in _row_idx + // its value equals to prefix sum of _channel_rows_histogram + // after calculation, it will be end offset for channel i. + vectorized::PaddedPODArray<uint32_t> _channel_pos_offsets; +}; + +class ExchangeTrivialWriter final : public ExchangeWriterBase { +public: + ExchangeTrivialWriter() = default; + + Status write(ExchangeSinkLocalState* local_state, RuntimeState* state, vectorized::Block* block, + bool eos); + +private: + Status _channel_add_rows(RuntimeState* state, + std::vector<std::shared_ptr<vectorized::Channel>>& channels, + size_t channel_count, const uint32_t* __restrict channel_ids, + size_t rows, vectorized::Block* block, bool eos); +}; + +// maybe auto partition +class ExchangeOlapWriter final : public ExchangeWriterBase { +public: + ExchangeOlapWriter() = default; + + Status write(ExchangeSinkLocalState* local_state, RuntimeState* state, vectorized::Block* block, Review Comment: 为什么不把这个改成虚函数？这样调用的地方就不用cast了 -- 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] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
