mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-11 17:02:25 +00:00
143 lines
5.3 KiB
C++
143 lines
5.3 KiB
C++
|
#include <Storages/MergeTree/MergeTreePartInfo.h>
|
||
|
#include <Storages/MergeTree/MergeTreeDataPart.h>
|
||
|
#include <DataTypes/DataTypeDate.h>
|
||
|
#include <IO/ReadBufferFromFile.h>
|
||
|
#include <IO/WriteBufferFromFile.h>
|
||
|
#include <IO/HashingWriteBuffer.h>
|
||
|
#include <Common/Exception.h>
|
||
|
#include <Common/localBackup.h>
|
||
|
#include <Parsers/ASTFunction.h>
|
||
|
#include <Parsers/ASTIdentifier.h>
|
||
|
|
||
|
#include <boost/program_options.hpp>
|
||
|
#include <Poco/Path.h>
|
||
|
#include <Poco/File.h>
|
||
|
|
||
|
#include <iostream>
|
||
|
|
||
|
namespace DB
|
||
|
{
|
||
|
|
||
|
namespace ErrorCodes
|
||
|
{
|
||
|
extern const int DIRECTORY_ALREADY_EXISTS;
|
||
|
extern const int BAD_DATA_PART_NAME;
|
||
|
extern const int NO_FILE_IN_DATA_PART;
|
||
|
}
|
||
|
|
||
|
void run(String part_path, String date_column, String dest_path)
|
||
|
{
|
||
|
auto old_part_path = Poco::Path::forDirectory(part_path);
|
||
|
String old_part_name = old_part_path.directory(old_part_path.depth() - 1);
|
||
|
String old_part_path_str = old_part_path.toString();
|
||
|
|
||
|
auto part_info = MergeTreePartInfo::fromPartName(old_part_name, MergeTreeDataFormatVersion(0));
|
||
|
String new_part_name = part_info.getPartName();
|
||
|
|
||
|
auto new_part_path = Poco::Path::forDirectory(dest_path);
|
||
|
new_part_path.pushDirectory(new_part_name);
|
||
|
if (Poco::File(new_part_path).exists())
|
||
|
throw Exception("Destination part directory `" + new_part_path.toString() + "` already exists",
|
||
|
ErrorCodes::DIRECTORY_ALREADY_EXISTS);
|
||
|
|
||
|
DayNum min_date;
|
||
|
DayNum max_date;
|
||
|
MergeTreePartInfo::parseMinMaxDatesFromPartName(old_part_name, min_date, max_date);
|
||
|
|
||
|
UInt32 yyyymm = DateLUT::instance().toNumYYYYMM(min_date);
|
||
|
if (yyyymm != DateLUT::instance().toNumYYYYMM(max_date))
|
||
|
throw Exception("Part " + old_part_name + " spans different months",
|
||
|
ErrorCodes::BAD_DATA_PART_NAME);
|
||
|
|
||
|
ReadBufferFromFile checksums_in(old_part_path_str + "checksums.txt", 4096);
|
||
|
MergeTreeDataPartChecksums checksums;
|
||
|
checksums.read(checksums_in);
|
||
|
|
||
|
auto date_col_checksum_it = checksums.files.find(date_column + ".bin");
|
||
|
if (date_col_checksum_it == checksums.files.end())
|
||
|
throw Exception("Couldn't find checksum for the date column .bin file `" + date_column + ".bin`",
|
||
|
ErrorCodes::NO_FILE_IN_DATA_PART);
|
||
|
|
||
|
UInt64 rows = date_col_checksum_it->second.uncompressed_size / DataTypeDate().getSizeOfValueInMemory();
|
||
|
|
||
|
auto new_tmp_part_path = Poco::Path::forDirectory(dest_path);
|
||
|
new_tmp_part_path.pushDirectory("tmp_convert_" + new_part_name);
|
||
|
String new_tmp_part_path_str = new_tmp_part_path.toString();
|
||
|
try
|
||
|
{
|
||
|
Poco::File(new_tmp_part_path).remove(/* recursive = */ true);
|
||
|
}
|
||
|
catch (const Poco::FileNotFoundException &)
|
||
|
{
|
||
|
/// If the file is already deleted, do nothing.
|
||
|
}
|
||
|
localBackup(old_part_path, new_tmp_part_path, {});
|
||
|
|
||
|
WriteBufferFromFile count_out(new_tmp_part_path_str + "count.txt", 4096);
|
||
|
HashingWriteBuffer count_out_hashing(count_out);
|
||
|
writeIntText(rows, count_out_hashing);
|
||
|
count_out_hashing.next();
|
||
|
checksums.files["count.txt"].file_size = count_out_hashing.count();
|
||
|
checksums.files["count.txt"].file_hash = count_out_hashing.getHash();
|
||
|
|
||
|
MergeTreeDataPart::MinMaxIndex minmax_idx(min_date, max_date);
|
||
|
Names minmax_idx_columns = {date_column};
|
||
|
DataTypes minmax_idx_column_types = {std::make_shared<DataTypeDate>()};
|
||
|
minmax_idx.store(minmax_idx_columns, minmax_idx_column_types, new_tmp_part_path_str, checksums);
|
||
|
|
||
|
Block partition_key_sample{{nullptr, std::make_shared<DataTypeUInt32>(), makeASTFunction("toYYYYMM", std::make_shared<ASTIdentifier>(date_column))->getColumnName()}};
|
||
|
|
||
|
MergeTreePartition partition(yyyymm);
|
||
|
partition.store(partition_key_sample, new_tmp_part_path_str, checksums);
|
||
|
String partition_id = partition.getID(partition_key_sample);
|
||
|
|
||
|
Poco::File(new_tmp_part_path_str + "checksums.txt").setWriteable();
|
||
|
WriteBufferFromFile checksums_out(new_tmp_part_path_str + "checksums.txt", 4096);
|
||
|
checksums.write(checksums_out);
|
||
|
|
||
|
Poco::File(new_tmp_part_path).renameTo(new_part_path.toString());
|
||
|
}
|
||
|
|
||
|
}
|
||
|
|
||
|
int main(int argc, char ** argv)
|
||
|
try
|
||
|
{
|
||
|
boost::program_options::options_description desc("Allowed options");
|
||
|
desc.add_options()
|
||
|
("help,h", "produce help message")
|
||
|
("part", boost::program_options::value<std::string>()->required(),
|
||
|
"part directory to convert")
|
||
|
("date-column", boost::program_options::value<std::string>()->required(),
|
||
|
"name of the date column")
|
||
|
("to", boost::program_options::value<std::string>()->required(),
|
||
|
"destination directory")
|
||
|
;
|
||
|
|
||
|
boost::program_options::variables_map options;
|
||
|
boost::program_options::store(boost::program_options::parse_command_line(argc, argv, desc), options);
|
||
|
|
||
|
if (options.count("help") || options.size() < 3)
|
||
|
{
|
||
|
std::cout
|
||
|
<< "Convert a MergeTree part from the old-style month-partitioned table "
|
||
|
<< "(e.g. 20140317_20140323_2_2_0) to the format suitable for ATTACH'ing to a custom-partitioned "
|
||
|
<< "table (201403_2_2_0)." << std::endl << std::endl;
|
||
|
std::cout << desc << std::endl;
|
||
|
return 1;
|
||
|
}
|
||
|
|
||
|
auto part_path = options.at("part").as<DB::String>();
|
||
|
auto date_column = options.at("date-column").as<DB::String>();
|
||
|
auto dest_path = options.at("to").as<DB::String>();
|
||
|
|
||
|
DB::run(part_path, date_column, dest_path);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
catch (...)
|
||
|
{
|
||
|
std::cerr << DB::getCurrentExceptionMessage(true) << '\n';
|
||
|
throw;
|
||
|
}
|