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80 lines
3.0 KiB
C++
80 lines
3.0 KiB
C++
#include <Storages/MergeTree/MergedColumnOnlyOutputStream.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 NOT_IMPLEMENTED;
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}
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MergedColumnOnlyOutputStream::MergedColumnOnlyOutputStream(
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const MergeTreeDataPartPtr & data_part, const Block & header_, bool sync_,
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CompressionCodecPtr default_codec, bool skip_offsets_,
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const std::vector<MergeTreeIndexPtr> & indices_to_recalc,
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WrittenOffsetColumns * offset_columns_,
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const MergeTreeIndexGranularity & index_granularity,
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const MergeTreeIndexGranularityInfo * index_granularity_info,
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bool is_writing_temp_files)
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: IMergedBlockOutputStream(data_part),
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header(header_), sync(sync_)
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{
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const auto & global_settings = data_part->storage.global_context.getSettings();
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MergeTreeWriterSettings writer_settings(
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global_settings,
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index_granularity_info ? index_granularity_info->is_adaptive : data_part->storage.canUseAdaptiveGranularity(),
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global_settings.min_bytes_to_use_direct_io);
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writer_settings.is_writing_temp_files = is_writing_temp_files;
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writer_settings.skip_offsets = skip_offsets_;
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writer = data_part->getWriter(header.getNamesAndTypesList(), indices_to_recalc,
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default_codec,std::move(writer_settings), index_granularity);
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writer->setWrittenOffsetColumns(offset_columns_);
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writer->initSkipIndices();
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}
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void MergedColumnOnlyOutputStream::write(const Block & block)
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{
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std::unordered_set<String> skip_indexes_column_names_set;
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for (const auto & index : writer->getSkipIndices())
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std::copy(index->columns.cbegin(), index->columns.cend(),
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std::inserter(skip_indexes_column_names_set, skip_indexes_column_names_set.end()));
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Names skip_indexes_column_names(skip_indexes_column_names_set.begin(), skip_indexes_column_names_set.end());
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Block skip_indexes_block = getBlockAndPermute(block, skip_indexes_column_names, nullptr);
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size_t rows = block.rows();
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if (!rows)
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return;
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writer->write(block);
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writer->calculateAndSerializeSkipIndices(skip_indexes_block, rows);
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writer->next();
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}
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void MergedColumnOnlyOutputStream::writeSuffix()
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{
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throw Exception("Method writeSuffix is not supported by MergedColumnOnlyOutputStream", ErrorCodes::NOT_IMPLEMENTED);
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}
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MergeTreeData::DataPart::Checksums
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MergedColumnOnlyOutputStream::writeSuffixAndGetChecksums(MergeTreeData::MutableDataPartPtr & new_part, MergeTreeData::DataPart::Checksums & all_checksums)
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{
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/// Finish columns serialization.
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MergeTreeData::DataPart::Checksums checksums;
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writer->finishDataSerialization(checksums, sync);
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writer->finishSkipIndicesSerialization(checksums);
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auto columns = new_part->getColumns();
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auto removed_files = removeEmptyColumnsFromPart(new_part, columns, checksums);
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for (const String & removed_file : removed_files)
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if (all_checksums.files.count(removed_file))
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all_checksums.files.erase(removed_file);
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new_part->setColumns(columns);
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return checksums;
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}
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}
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