arrow_stream_reader.h

// 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 <cstddef>
#include <memory>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>

#include "cctz/time_zone.h"
#include "common/status.h"
#include "format/arrow/arrow_pip_input_stream.h"
#include "format/file_reader/new_plain_text_line_reader.h"
#include "format/generic_reader.h"
#include "io/file_factory.h"
#include "io/fs/file_reader_writer_fwd.h"

namespace doris {
namespace io {
class FileSystem;
struct IOContext;
} // namespace io

#include "common/compile_check_begin.h"

struct ScannerCounter;
class Block;

class ArrowStreamReader : public GenericReader {
    ENABLE_FACTORY_CREATOR(ArrowStreamReader);

public:
    ArrowStreamReader(RuntimeState* state, RuntimeProfile* profile, ScannerCounter* counter,
                      const TFileScanRangeParams& params, const TFileRangeDesc& range,
                      const std::vector<SlotDescriptor*>& file_slot_descs, io::IOContext* io_ctx);

    ~ArrowStreamReader() override;

    Status init_reader();

    Status _do_get_next_block(Block* block, size_t* read_rows, bool* eof) override;

    Status _get_columns_impl(std::unordered_map<std::string, DataTypePtr>* name_to_type) override;

protected:
    Status _do_init_reader(ReaderInitContext* /*ctx*/) override { return init_reader(); }

private:
    RuntimeState* _state;
    const TFileRangeDesc& _range;
    const std::vector<SlotDescriptor*>& _file_slot_descs;
    io::IOContext* _io_ctx;
    io::FileReaderSPtr _file_reader;
    std::unique_ptr<doris::ArrowPipInputStream> _pip_stream;
    cctz::time_zone _ctzz;
};
#include "common/compile_check_end.h"
} // namespace doris