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https://github.com/ClickHouse/ClickHouse.git
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79 lines
2.3 KiB
C++
79 lines
2.3 KiB
C++
#include <iostream>
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#include <boost/program_options.hpp>
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#include <Compression/CompressedReadBuffer.h>
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#include <Compression/CompressedReadBufferFromFile.h>
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#include <Compression/CompressedWriteBuffer.h>
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#include <Formats/NativeReader.h>
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#include <IO/Operators.h>
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#include <IO/ReadBufferFromFile.h>
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#include <IO/ReadHelpers.h>
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#include <IO/WriteBufferFromFileDescriptor.h>
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#include <Storages/MergeTree/MergeTreeWriteAheadLog.h>
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/*
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* Dump the Write Ahead Log file, outputs:
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* Part 0, Version: 0, Action : ADD_PART, Name: 4_1_1_0, Block:
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a Int32 Int32(size = 2), b Int32 Int32(size = 2), c Int32 Int32(size = 2)
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*/
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static void dump(const std::string & bin_path)
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{
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DB::ReadBufferFromFile in(bin_path);
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DB::NativeReader block_in(in, 0);
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DB::Block block;
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DB::WriteBufferFromFileDescriptor out(STDOUT_FILENO);
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for (size_t part_num = 0; !in.eof(); ++part_num)
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{
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UInt8 version;
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String part_name;
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DB::MergeTreeWriteAheadLog::ActionType action_type;
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DB::readIntBinary(version, in);
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DB::readIntBinary(action_type, in);
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DB::readStringBinary(part_name, in);
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block = block_in.read();
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out << "Part " << part_num << ", Version: " << version
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<< ", Action : " << (action_type == DB::MergeTreeWriteAheadLog::ActionType::ADD_PART ? "ADD_PART" : "DROP_PART")
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<< ", Name: " << part_name << ", Block:\n";
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out << block.dumpStructure() << "\n";
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out << "\n" << DB::flush;
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}
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}
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int main(int argc, char ** argv)
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{
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boost::program_options::options_description desc("Allowed options");
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desc.add_options()("help,h", "produce help message");
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boost::program_options::variables_map options;
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boost::program_options::store(boost::program_options::parse_command_line(argc, argv, desc), options);
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if (options.count("help") || argc != 2)
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{
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std::cout << "Usage: " << argv[0] << " wal.bin" << std::endl;
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std::cout << desc << std::endl;
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return 1;
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}
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try
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{
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dump(argv[1]);
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}
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catch (const DB::Exception & e)
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{
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std::cerr << e.what() << ", " << e.message() << std::endl
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<< std::endl
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<< "Stack trace:" << std::endl
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<< e.getStackTraceString() << std::endl;
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throw;
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}
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return 0;
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}
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