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https://github.com/ClickHouse/ClickHouse.git
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Improve performance of format Regexp
This commit is contained in:
Alexey Milovidov
parent
678dd6b3f2
commit
872d0a0fbe
@ -45,7 +45,7 @@ bool RegexpFieldExtractor::parseRow(PeekableReadBuffer & buf)
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buf.makeContinuousMemoryFromCheckpointToPos();
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buf.rollbackToCheckpoint();
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bool match = RE2::FullMatchN(re2::StringPiece(buf.position(), line_size), regexp, re2_arguments_ptrs.data(), re2_arguments_ptrs.size());
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bool match = re2_st::RE2::FullMatchN(re2_st::StringPiece(buf.position(), line_size), regexp, re2_arguments_ptrs.data(), re2_arguments_ptrs.size());
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if (!match && !skip_unmatched)
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throw Exception("Line \"" + std::string(buf.position(), line_size) + "\" doesn't match the regexp.", ErrorCodes::INCORRECT_DATA);
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@ -1,7 +1,7 @@
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#pragma once
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#include <re2/re2.h>
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#include <re2/stringpiece.h>
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#include <re2_st/re2.h>
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#include <re2_st/stringpiece.h>
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#include <string>
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#include <vector>
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#include <Core/Block.h>
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@ -12,6 +12,7 @@
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#include <IO/PeekableReadBuffer.h>
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#include <Formats/ParsedTemplateFormatString.h>
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namespace DB
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{
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@ -26,17 +27,17 @@ public:
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/// Return true if row was successfully parsed and row fields were extracted.
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bool parseRow(PeekableReadBuffer & buf);
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re2::StringPiece getField(size_t index) { return matched_fields[index]; }
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re2_st::StringPiece getField(size_t index) { return matched_fields[index]; }
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size_t getMatchedFieldsSize() const { return matched_fields.size(); }
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size_t getNumberOfGroups() const { return regexp.NumberOfCapturingGroups(); }
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private:
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const RE2 regexp;
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const re2_st::RE2 regexp;
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// The vector of fields extracted from line using regexp.
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std::vector<re2::StringPiece> matched_fields;
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std::vector<re2_st::StringPiece> matched_fields;
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// These two vectors are needed to use RE2::FullMatchN (function for extracting fields).
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std::vector<RE2::Arg> re2_arguments;
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std::vector<RE2::Arg *> re2_arguments_ptrs;
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std::vector<re2_st::RE2::Arg> re2_arguments;
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std::vector<re2_st::RE2::Arg *> re2_arguments_ptrs;
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bool skip_unmatched;
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};
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@ -26,7 +26,6 @@ if (NOT DEFINED ENABLE_UTILS OR ENABLE_UTILS)
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add_subdirectory (zookeeper-adjust-block-numbers-to-parts)
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add_subdirectory (wikistat-loader)
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add_subdirectory (check-marks)
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add_subdirectory (convert-month-partitioned-parts)
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add_subdirectory (checksum-for-compressed-block)
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add_subdirectory (db-generator)
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add_subdirectory (wal-dump)
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@ -1,2 +0,0 @@
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add_executable (convert-month-partitioned-parts main.cpp)
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target_link_libraries(convert-month-partitioned-parts PRIVATE clickhouse_aggregate_functions dbms clickhouse_parsers boost::program_options)
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@ -1,148 +0,0 @@
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#include <DataTypes/DataTypeDate.h>
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#include <DataTypes/DataTypesNumber.h>
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#include <IO/HashingWriteBuffer.h>
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#include <IO/ReadBufferFromFile.h>
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#include <IO/WriteBufferFromFile.h>
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#include <Parsers/ASTFunction.h>
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#include <Parsers/ASTIdentifier.h>
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#include <Storages/MergeTree/IMergeTreeDataPart.h>
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#include <Storages/MergeTree/MergeTreePartInfo.h>
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#include <Storages/MergeTree/localBackup.h>
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#include <Common/Exception.h>
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#include <boost/program_options.hpp>
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#include <Poco/Path.h>
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#include <Poco/File.h>
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#include <iostream>
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#include <Disks/DiskLocal.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int DIRECTORY_ALREADY_EXISTS;
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extern const int BAD_DATA_PART_NAME;
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extern const int NO_FILE_IN_DATA_PART;
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}
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void run(String part_path, String date_column, String dest_path)
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{
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std::shared_ptr<IDisk> disk = std::make_shared<DiskLocal>("local", "/", 0);
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auto old_part_path = Poco::Path::forDirectory(part_path);
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const String & old_part_name = old_part_path.directory(old_part_path.depth() - 1);
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String old_part_path_str = old_part_path.toString();
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auto part_info = MergeTreePartInfo::fromPartName(old_part_name, MergeTreeDataFormatVersion(0));
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String new_part_name = part_info.getPartName();
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auto new_part_path = Poco::Path::forDirectory(dest_path);
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new_part_path.pushDirectory(new_part_name);
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if (Poco::File(new_part_path).exists())
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throw Exception("Destination part directory `" + new_part_path.toString() + "` already exists",
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ErrorCodes::DIRECTORY_ALREADY_EXISTS);
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DayNum min_date;
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DayNum max_date;
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MergeTreePartInfo::parseMinMaxDatesFromPartName(old_part_name, min_date, max_date);
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const auto & time_zone = DateLUT::instance();
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UInt32 yyyymm = time_zone.toNumYYYYMM(min_date);
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if (yyyymm != time_zone.toNumYYYYMM(max_date))
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throw Exception("Part " + old_part_name + " spans different months",
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ErrorCodes::BAD_DATA_PART_NAME);
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ReadBufferFromFile checksums_in(old_part_path_str + "checksums.txt", 4096);
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MergeTreeDataPartChecksums checksums;
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checksums.read(checksums_in);
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auto date_col_checksum_it = checksums.files.find(date_column + ".bin");
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if (date_col_checksum_it == checksums.files.end())
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throw Exception("Couldn't find checksum for the date column .bin file `" + date_column + ".bin`",
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ErrorCodes::NO_FILE_IN_DATA_PART);
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UInt64 rows = date_col_checksum_it->second.uncompressed_size / DataTypeDate().getSizeOfValueInMemory();
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auto new_tmp_part_path = Poco::Path::forDirectory(dest_path);
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new_tmp_part_path.pushDirectory("tmp_convert_" + new_part_name);
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String new_tmp_part_path_str = new_tmp_part_path.toString();
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try
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{
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Poco::File(new_tmp_part_path).remove(/* recursive = */ true);
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}
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catch (const Poco::FileNotFoundException &)
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{
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/// If the file is already deleted, do nothing.
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}
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localBackup(disk, old_part_path.toString(), new_tmp_part_path.toString(), {});
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WriteBufferFromFile count_out(new_tmp_part_path_str + "count.txt", 4096);
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HashingWriteBuffer count_out_hashing(count_out);
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writeIntText(rows, count_out_hashing);
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count_out_hashing.next();
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checksums.files["count.txt"].file_size = count_out_hashing.count();
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checksums.files["count.txt"].file_hash = count_out_hashing.getHash();
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IMergeTreeDataPart::MinMaxIndex minmax_idx(min_date, max_date);
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Names minmax_idx_columns = {date_column};
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DataTypes minmax_idx_column_types = {std::make_shared<DataTypeDate>()};
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minmax_idx.store(minmax_idx_columns, minmax_idx_column_types, disk, new_tmp_part_path_str, checksums);
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Block partition_key_sample{{nullptr, std::make_shared<DataTypeUInt32>(), makeASTFunction("toYYYYMM", std::make_shared<ASTIdentifier>(date_column))->getColumnName()}};
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MergeTreePartition partition(yyyymm);
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partition.store(partition_key_sample, disk, new_tmp_part_path_str, checksums);
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String partition_id = partition.getID(partition_key_sample);
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Poco::File(new_tmp_part_path_str + "checksums.txt").setWriteable();
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WriteBufferFromFile checksums_out(new_tmp_part_path_str + "checksums.txt", 4096);
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checksums.write(checksums_out);
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checksums_in.close();
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checksums_out.close();
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Poco::File(new_tmp_part_path).renameTo(new_part_path.toString());
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}
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}
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int main(int argc, char ** argv)
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try
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{
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boost::program_options::options_description desc("Allowed options");
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desc.add_options()
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("help,h", "produce help message")
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("part", boost::program_options::value<std::string>()->required(),
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"part directory to convert")
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("date-column", boost::program_options::value<std::string>()->required(),
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"name of the date column")
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("to", boost::program_options::value<std::string>()->required(),
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"destination directory")
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;
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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") || options.size() < 3)
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{
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std::cout
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<< "Convert a MergeTree part from the old-style month-partitioned table "
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<< "(e.g. 20140317_20140323_2_2_0) to the format suitable for ATTACH'ing to a custom-partitioned "
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<< "table (201403_2_2_0)." << std::endl << 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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auto part_path = options.at("part").as<DB::String>();
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auto date_column = options.at("date-column").as<DB::String>();
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auto dest_path = options.at("to").as<DB::String>();
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DB::run(part_path, date_column, dest_path);
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return 0;
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}
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catch (...)
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{
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std::cerr << DB::getCurrentExceptionMessage(true) << '\n';
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throw;
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}
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