mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-15 19:02:04 +00:00
78 lines
3.0 KiB
C++
78 lines
3.0 KiB
C++
#pragma once
|
|
|
|
#include <Storages/MergeTree/IMergeTreeDataPart.h>
|
|
|
|
namespace DB
|
|
{
|
|
|
|
/** In compact format all columns are stored in one file (`data.bin`).
|
|
* Data is split in granules and columns are serialized sequentially in one granule.
|
|
* Granules are written one by one in data file.
|
|
* Marks are also stored in single file (`data.mrk3`).
|
|
* In compact format one mark is an array of marks for every column and a number of rows in granule.
|
|
* Format of other data part files is not changed.
|
|
* It's considered to store only small parts in compact format (up to 10M).
|
|
* NOTE: Compact parts aren't supported for tables with non-adaptive granularity.
|
|
* NOTE: In compact part compressed and uncompressed size of single column is unknown.
|
|
*/
|
|
class MergeTreeDataPartCompact : public IMergeTreeDataPart
|
|
{
|
|
public:
|
|
static constexpr auto DATA_FILE_NAME = "data";
|
|
static constexpr auto DATA_FILE_NAME_WITH_EXTENSION = "data.bin";
|
|
|
|
MergeTreeDataPartCompact(
|
|
const MergeTreeData & storage_,
|
|
const String & name_,
|
|
const MergeTreePartInfo & info_,
|
|
const VolumePtr & volume_,
|
|
const std::optional<String> & relative_path_ = {},
|
|
const IMergeTreeDataPart * parent_part_ = nullptr);
|
|
|
|
MergeTreeDataPartCompact(
|
|
MergeTreeData & storage_,
|
|
const String & name_,
|
|
const VolumePtr & volume_,
|
|
const std::optional<String> & relative_path_ = {},
|
|
const IMergeTreeDataPart * parent_part_ = nullptr);
|
|
|
|
MergeTreeReaderPtr getReader(
|
|
const NamesAndTypesList & columns,
|
|
const StorageMetadataPtr & metadata_snapshot,
|
|
const MarkRanges & mark_ranges,
|
|
UncompressedCache * uncompressed_cache,
|
|
MarkCache * mark_cache,
|
|
const MergeTreeReaderSettings & reader_settings_,
|
|
const ValueSizeMap & avg_value_size_hints,
|
|
const ReadBufferFromFileBase::ProfileCallback & profile_callback) const override;
|
|
|
|
MergeTreeWriterPtr getWriter(
|
|
const NamesAndTypesList & columns_list,
|
|
const StorageMetadataPtr & metadata_snapshot,
|
|
const std::vector<MergeTreeIndexPtr> & indices_to_recalc,
|
|
const CompressionCodecPtr & default_codec_,
|
|
const MergeTreeWriterSettings & writer_settings,
|
|
const MergeTreeIndexGranularity & computed_index_granularity) const override;
|
|
|
|
bool isStoredOnDisk() const override { return true; }
|
|
|
|
bool isStoredOnRemoteDisk() const override;
|
|
|
|
bool hasColumnFiles(const NameAndTypePair & column) const override;
|
|
|
|
String getFileNameForColumn(const NameAndTypePair & /* column */) const override { return DATA_FILE_NAME; }
|
|
|
|
~MergeTreeDataPartCompact() override;
|
|
|
|
private:
|
|
void checkConsistency(bool require_part_metadata) const override;
|
|
|
|
/// Loads marks index granularity into memory
|
|
void loadIndexGranularity() override;
|
|
|
|
/// Compact parts doesn't support per column size, only total size
|
|
void calculateEachColumnSizes(ColumnSizeByName & each_columns_size, ColumnSize & total_size) const override;
|
|
};
|
|
|
|
}
|