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84 lines
2.7 KiB
C++
84 lines
2.7 KiB
C++
#include <Storages/MergeTree/MergedColumnOnlyOutputStream.h>
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#include <Storages/MergeTree/MergeTreeDataPartWriterOnDisk.h>
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#include <Interpreters/Context.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,
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const StorageMetadataPtr & metadata_snapshot_,
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const Block & header_,
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CompressionCodecPtr default_codec,
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const MergeTreeIndices & 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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: IMergedBlockOutputStream(data_part, metadata_snapshot_)
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, header(header_)
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{
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const auto & global_settings = data_part->storage.getContext()->getSettings();
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const auto & storage_settings = data_part->storage.getSettings();
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MergeTreeWriterSettings writer_settings(
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global_settings,
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storage_settings,
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index_granularity_info ? index_granularity_info->is_adaptive : data_part->storage.canUseAdaptiveGranularity(),
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/* rewrite_primary_key = */false);
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writer = data_part->getWriter(
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header.getNamesAndTypesList(),
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metadata_snapshot_,
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indices_to_recalc,
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default_codec,
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std::move(writer_settings),
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index_granularity);
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auto * writer_on_disk = dynamic_cast<MergeTreeDataPartWriterOnDisk *>(writer.get());
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if (!writer_on_disk)
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throw Exception("MergedColumnOnlyOutputStream supports only parts stored on disk", ErrorCodes::NOT_IMPLEMENTED);
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writer_on_disk->setWrittenOffsetColumns(offset_columns_);
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}
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void MergedColumnOnlyOutputStream::write(const Block & block)
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{
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if (!block.rows())
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return;
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writer->write(block, nullptr);
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}
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MergeTreeData::DataPart::Checksums
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MergedColumnOnlyOutputStream::writeSuffixAndGetChecksums(
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MergeTreeData::MutableDataPartPtr & new_part,
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MergeTreeData::DataPart::Checksums & all_checksums,
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bool sync)
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{
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/// Finish columns serialization.
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MergeTreeData::DataPart::Checksums checksums;
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writer->finish(checksums, sync);
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for (const auto & [projection_name, projection_part] : new_part->getProjectionParts())
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checksums.addFile(
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projection_name + ".proj",
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projection_part->checksums.getTotalSizeOnDisk(),
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projection_part->checksums.getTotalChecksumUInt128());
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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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