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265 lines
10 KiB
C++
265 lines
10 KiB
C++
#include "MergeTreeDataPartWide.h"
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#include <Poco/File.h>
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#include <Storages/MergeTree/MergeTreeReaderWide.h>
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#include <Storages/MergeTree/MergeTreeDataPartWriterWide.h>
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#include <Storages/MergeTree/IMergeTreeDataPartWriter.h>
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#include <DataTypes/NestedUtils.h>
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#include <Core/NamesAndTypes.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 CANNOT_READ_ALL_DATA;
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extern const int NO_FILE_IN_DATA_PART;
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extern const int BAD_SIZE_OF_FILE_IN_DATA_PART;
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extern const int LOGICAL_ERROR;
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}
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MergeTreeDataPartWide::MergeTreeDataPartWide(
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MergeTreeData & storage_,
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const String & name_,
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const VolumePtr & volume_,
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const std::optional<String> & relative_path_)
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: IMergeTreeDataPart(storage_, name_, volume_, relative_path_, Type::WIDE)
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{
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}
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MergeTreeDataPartWide::MergeTreeDataPartWide(
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const MergeTreeData & storage_,
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const String & name_,
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const MergeTreePartInfo & info_,
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const VolumePtr & volume_,
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const std::optional<String> & relative_path_)
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: IMergeTreeDataPart(storage_, name_, info_, volume_, relative_path_, Type::WIDE)
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{
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}
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IMergeTreeDataPart::MergeTreeReaderPtr MergeTreeDataPartWide::getReader(
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const NamesAndTypesList & columns_to_read,
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const StorageMetadataPtr & metadata_snapshot,
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const MarkRanges & mark_ranges,
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UncompressedCache * uncompressed_cache,
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MarkCache * mark_cache,
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const MergeTreeReaderSettings & reader_settings,
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const ValueSizeMap & avg_value_size_hints,
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const ReadBufferFromFileBase::ProfileCallback & profile_callback) const
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{
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auto new_settings = reader_settings;
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new_settings.convert_nested_to_subcolumns = true;
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auto ptr = std::static_pointer_cast<const MergeTreeDataPartWide>(shared_from_this());
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return std::make_unique<MergeTreeReaderWide>(
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ptr, columns_to_read, metadata_snapshot, uncompressed_cache,
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mark_cache, mark_ranges, new_settings,
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avg_value_size_hints, profile_callback);
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}
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IMergeTreeDataPart::MergeTreeWriterPtr MergeTreeDataPartWide::getWriter(
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const NamesAndTypesList & columns_list,
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const StorageMetadataPtr & metadata_snapshot,
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const std::vector<MergeTreeIndexPtr> & indices_to_recalc,
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const CompressionCodecPtr & default_codec_,
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const MergeTreeWriterSettings & writer_settings,
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const MergeTreeIndexGranularity & computed_index_granularity) const
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{
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return std::make_unique<MergeTreeDataPartWriterWide>(
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shared_from_this(), columns_list, metadata_snapshot, indices_to_recalc,
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index_granularity_info.marks_file_extension,
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default_codec_, writer_settings, computed_index_granularity);
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}
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/// Takes into account the fact that several columns can e.g. share their .size substreams.
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/// When calculating totals these should be counted only once.
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ColumnSize MergeTreeDataPartWide::getColumnSizeImpl(
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const NameAndTypePair & column, std::unordered_set<String> * processed_substreams) const
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{
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ColumnSize size;
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if (checksums.empty())
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return size;
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column.type->enumerateStreams([&](const IDataType::SubstreamPath & substream_path, const IDataType & /* substream_type */)
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{
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String file_name = IDataType::getFileNameForStream(column, substream_path);
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if (processed_substreams && !processed_substreams->insert(file_name).second)
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return;
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auto bin_checksum = checksums.files.find(file_name + ".bin");
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if (bin_checksum != checksums.files.end())
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{
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size.data_compressed += bin_checksum->second.file_size;
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size.data_uncompressed += bin_checksum->second.uncompressed_size;
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}
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auto mrk_checksum = checksums.files.find(file_name + index_granularity_info.marks_file_extension);
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if (mrk_checksum != checksums.files.end())
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size.marks += mrk_checksum->second.file_size;
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}, {});
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return size;
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}
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void MergeTreeDataPartWide::loadIndexGranularity()
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{
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String full_path = getFullRelativePath();
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index_granularity_info.changeGranularityIfRequired(volume->getDisk(), full_path);
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if (columns.empty())
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throw Exception("No columns in part " + name, ErrorCodes::NO_FILE_IN_DATA_PART);
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/// We can use any column, it doesn't matter
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std::string marks_file_path = index_granularity_info.getMarksFilePath(full_path + getFileNameForColumn(columns.front()));
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if (!volume->getDisk()->exists(marks_file_path))
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throw Exception("Marks file '" + fullPath(volume->getDisk(), marks_file_path) + "' doesn't exist", ErrorCodes::NO_FILE_IN_DATA_PART);
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size_t marks_file_size = volume->getDisk()->getFileSize(marks_file_path);
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if (!index_granularity_info.is_adaptive)
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{
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size_t marks_count = marks_file_size / index_granularity_info.getMarkSizeInBytes();
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index_granularity.resizeWithFixedGranularity(marks_count, index_granularity_info.fixed_index_granularity); /// all the same
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}
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else
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{
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auto buffer = volume->getDisk()->readFile(marks_file_path, marks_file_size);
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while (!buffer->eof())
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{
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buffer->seek(sizeof(size_t) * 2, SEEK_CUR); /// skip offset_in_compressed file and offset_in_decompressed_block
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size_t granularity;
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readIntBinary(granularity, *buffer);
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index_granularity.appendMark(granularity);
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}
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if (index_granularity.getMarksCount() * index_granularity_info.getMarkSizeInBytes() != marks_file_size)
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throw Exception("Cannot read all marks from file " + fullPath(volume->getDisk(), marks_file_path), ErrorCodes::CANNOT_READ_ALL_DATA);
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}
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index_granularity.setInitialized();
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}
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MergeTreeDataPartWide::~MergeTreeDataPartWide()
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{
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removeIfNeeded();
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}
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void MergeTreeDataPartWide::checkConsistency(bool require_part_metadata) const
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{
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checkConsistencyBase();
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String path = getFullRelativePath();
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if (!checksums.empty())
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{
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if (require_part_metadata)
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{
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for (const NameAndTypePair & name_type : columns)
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{
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IDataType::SubstreamPath stream_path;
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name_type.type->enumerateStreams([&](const IDataType::SubstreamPath & substream_path, const IDataType & /* substream_type */)
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{
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String file_name = IDataType::getFileNameForStream(name_type, substream_path);
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String mrk_file_name = file_name + index_granularity_info.marks_file_extension;
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String bin_file_name = file_name + ".bin";
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if (!checksums.files.count(mrk_file_name))
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throw Exception("No " + mrk_file_name + " file checksum for column " + name_type.name + " in part " + fullPath(volume->getDisk(), path),
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ErrorCodes::NO_FILE_IN_DATA_PART);
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if (!checksums.files.count(bin_file_name))
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throw Exception("No " + bin_file_name + " file checksum for column " + name_type.name + " in part " + fullPath(volume->getDisk(), path),
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ErrorCodes::NO_FILE_IN_DATA_PART);
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}, stream_path);
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}
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}
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}
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else
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{
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/// Check that all marks are nonempty and have the same size.
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std::optional<UInt64> marks_size;
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for (const NameAndTypePair & name_type : columns)
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{
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name_type.type->enumerateStreams([&](const IDataType::SubstreamPath & substream_path, const IDataType & /* substream_type */)
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{
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auto file_path = path + IDataType::getFileNameForStream(name_type, substream_path) + index_granularity_info.marks_file_extension;
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/// Missing file is Ok for case when new column was added.
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if (volume->getDisk()->exists(file_path))
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{
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UInt64 file_size = volume->getDisk()->getFileSize(file_path);
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if (!file_size)
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throw Exception("Part " + path + " is broken: " + fullPath(volume->getDisk(), file_path) + " is empty.",
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ErrorCodes::BAD_SIZE_OF_FILE_IN_DATA_PART);
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if (!marks_size)
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marks_size = file_size;
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else if (file_size != *marks_size)
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throw Exception("Part " + path + " is broken: marks have different sizes.",
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ErrorCodes::BAD_SIZE_OF_FILE_IN_DATA_PART);
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}
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});
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}
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}
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}
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bool MergeTreeDataPartWide::hasColumnFiles(const NameAndTypePair & column) const
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{
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bool res = true;
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column.type->enumerateStreams([&](const IDataType::SubstreamPath & substream_path, const IDataType & /* substream_type */)
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{
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String file_name = IDataType::getFileNameForStream(column, substream_path);
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auto bin_checksum = checksums.files.find(file_name + ".bin");
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auto mrk_checksum = checksums.files.find(file_name + index_granularity_info.marks_file_extension);
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if (bin_checksum == checksums.files.end() || mrk_checksum == checksums.files.end())
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res = false;
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}, {});
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return res;
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}
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String MergeTreeDataPartWide::getFileNameForColumn(const NameAndTypePair & column) const
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{
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String filename;
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column.type->enumerateStreams([&](const IDataType::SubstreamPath & substream_path, const IDataType & /* substream_type */)
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{
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if (filename.empty())
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filename = IDataType::getFileNameForStream(column, substream_path);
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});
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return filename;
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}
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void MergeTreeDataPartWide::calculateEachColumnSizes(ColumnSizeByName & each_columns_size, ColumnSize & total_size) const
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{
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std::unordered_set<String> processed_substreams;
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for (const NameAndTypePair & column : columns)
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{
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ColumnSize size = getColumnSizeImpl(column, &processed_substreams);
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each_columns_size[column.name] = size;
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total_size.add(size);
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#ifndef NDEBUG
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/// Most trivial types
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if (rows_count != 0 && column.type->isValueRepresentedByNumber() && !column.type->haveSubtypes())
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{
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size_t rows_in_column = size.data_uncompressed / column.type->getSizeOfValueInMemory();
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if (rows_in_column != rows_count)
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{
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throw Exception(
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ErrorCodes::LOGICAL_ERROR,
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"Column {} has rows count {} according to size in memory "
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"and size of single value, but data part {} has {} rows", backQuote(column.name), rows_in_column, name, rows_count);
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}
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}
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#endif
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}
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}
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}
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