ClickHouse/dbms/src/DataStreams/MarkInCompressedFile.h

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#pragma once
#include <tuple>
#include <Core/Types.h>
#include <IO/WriteHelpers.h>
#include <Common/PODArray.h>
#include <Common/config.h>
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#if USE_MIMALLOC
#include <Common/MiAllocator.h>
#endif
namespace DB
{
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/** Mark is the position in the compressed file. The compressed file consists of adjacent compressed blocks.
* Mark is a tuple - the offset in the file to the start of the compressed block, the offset in the decompressed block to the start of the data.
*/
struct MarkInCompressedFile
{
size_t offset_in_compressed_file;
size_t offset_in_decompressed_block;
bool operator==(const MarkInCompressedFile & rhs) const
{
return std::tie(offset_in_compressed_file, offset_in_decompressed_block)
== std::tie(rhs.offset_in_compressed_file, rhs.offset_in_decompressed_block);
}
bool operator!=(const MarkInCompressedFile & rhs) const
{
return !(*this == rhs);
}
String toString() const
{
return "(" + DB::toString(offset_in_compressed_file) + "," + DB::toString(offset_in_decompressed_block) + ")";
}
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String toStringWithRows(size_t rows_num)
{
return "(" + DB::toString(offset_in_compressed_file) + "," + DB::toString(offset_in_decompressed_block) + "," + DB::toString(rows_num) + ")";
}
};
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#if USE_MIMALLOC
using MarksInCompressedFile = PODArray<MarkInCompressedFile, 4096, MiAllocator>;
#else
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using MarksInCompressedFile = PODArray<MarkInCompressedFile>;
#endif
}