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24 lines
847 B
C++
24 lines
847 B
C++
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#include <Storages/BlockNumberColumn.h>
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#include <Compression/CompressionCodecMultiple.h>
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namespace DB
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{
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CompressionCodecPtr getCompressionCodecDelta(UInt8 delta_bytes_size);
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CompressionCodecPtr getCompressionCodecForBlockNumberColumn()
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{
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std::vector <CompressionCodecPtr> codecs;
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codecs.reserve(2);
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auto data_bytes_size = BlockNumberColumn::type->getSizeOfValueInMemory();
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codecs.emplace_back(getCompressionCodecDelta(data_bytes_size));
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codecs.emplace_back(CompressionCodecFactory::instance().get("LZ4", {}));
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return std::make_shared<CompressionCodecMultiple>(codecs);
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}
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const String BlockNumberColumn::name = "_block_number";
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const DataTypePtr BlockNumberColumn::type = std::make_shared<DataTypeUInt64>();
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const CompressionCodecPtr BlockNumberColumn::compression_codec = getCompressionCodecForBlockNumberColumn();
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}
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