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#include <Storages/MergeTree/MergeTreeDataPartInMemory.h>
#include <Storages/MergeTree/MergeTreeReaderInMemory.h>
#include <Storages/MergeTree/MergedBlockOutputStream.h>
#include <Storages/MergeTree/MergeTreeDataPartWriterInMemory.h>
#include <Storages/MergeTree/IMergeTreeReader.h>
#include <Storages/MergeTree/LoadedMergeTreeDataPartInfoForReader.h>
#include <Storages/MergeTree/DataPartStorageOnDiskFull.h>
#include <DataTypes/NestedUtils.h>
#include <Disks/createVolume.h>
#include <Interpreters/Context.h>
#include <Poco/Logger.h>
#include <Common/logger_useful.h>
namespace DB
{
namespace ErrorCodes
{
extern const int DIRECTORY_ALREADY_EXISTS;
extern const int NOT_IMPLEMENTED;
}
MergeTreeDataPartInMemory::MergeTreeDataPartInMemory(
const MergeTreeData & storage_,
const String & name_,
const MergeTreePartInfo & info_,
const MutableDataPartStoragePtr & data_part_storage_,
const IMergeTreeDataPart * parent_part_)
: IMergeTreeDataPart(storage_, name_, info_, data_part_storage_, Type::InMemory, parent_part_)
{
default_codec = CompressionCodecFactory::instance().get("NONE", {});
}
IMergeTreeDataPart::MergeTreeReaderPtr MergeTreeDataPartInMemory::getReader(
const NamesAndTypesList & columns_to_read,
const StorageSnapshotPtr & storage_snapshot,
const MarkRanges & mark_ranges,
UncompressedCache * /* uncompressed_cache */,
MarkCache * /* mark_cache */,
const AlterConversionsPtr & alter_conversions,
const MergeTreeReaderSettings & reader_settings,
const ValueSizeMap & /* avg_value_size_hints */,
const ReadBufferFromFileBase::ProfileCallback & /* profile_callback */) const
{
auto read_info = std::make_shared<LoadedMergeTreeDataPartInfoForReader>(shared_from_this(), alter_conversions);
auto ptr = std::static_pointer_cast<const MergeTreeDataPartInMemory>(shared_from_this());
return std::make_unique<MergeTreeReaderInMemory>(
read_info, ptr, columns_to_read, storage_snapshot, mark_ranges, reader_settings);
}
IMergeTreeDataPart::MergeTreeWriterPtr MergeTreeDataPartInMemory::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 */)
{
auto ptr = std::static_pointer_cast<MergeTreeDataPartInMemory>(shared_from_this());
return std::make_unique<MergeTreeDataPartWriterInMemory>(
ptr, columns_list, metadata_snapshot, writer_settings);
}
MutableDataPartStoragePtr MergeTreeDataPartInMemory::flushToDisk(const String & new_relative_path, const StorageMetadataPtr & metadata_snapshot) const
{
auto reservation = storage.reserveSpace(block.bytes(), getDataPartStorage());
VolumePtr volume = storage.getStoragePolicy()->getVolume(0);
VolumePtr data_part_volume = createVolumeFromReservation(reservation, volume);
auto new_data_part = storage.getDataPartBuilder(name, data_part_volume, new_relative_path)
.withPartFormat(storage.choosePartFormatOnDisk(block.bytes(), rows_count))
.build();
auto new_data_part_storage = new_data_part->getDataPartStoragePtr();
new_data_part_storage->beginTransaction();
new_data_part->uuid = uuid;
new_data_part->setColumns(columns, {}, metadata_snapshot->getMetadataVersion());
new_data_part->partition.value = partition.value;
new_data_part->minmax_idx = minmax_idx;
if (new_data_part_storage->exists())
{
throw Exception(
ErrorCodes::DIRECTORY_ALREADY_EXISTS,
"Could not flush part {}. Part in {} already exists",
quoteString(getDataPartStorage().getFullPath()),
new_data_part_storage->getFullPath());
}
new_data_part_storage->createDirectories();
auto compression_codec = storage.getContext()->chooseCompressionCodec(0, 0);
auto indices = MergeTreeIndexFactory::instance().getMany(metadata_snapshot->getSecondaryIndices());
MergedBlockOutputStream out(new_data_part, metadata_snapshot, columns, indices, compression_codec, NO_TRANSACTION_PTR);
out.write(block);
const auto & projections = metadata_snapshot->getProjections();
for (const auto & [projection_name, projection] : projection_parts)
{
if (projections.has(projection_name))
{
auto old_projection_part = asInMemoryPart(projection);
auto new_projection_part = new_data_part->getProjectionPartBuilder(projection_name)
.withPartFormat(storage.choosePartFormatOnDisk(old_projection_part->block.bytes(), rows_count))
.build();
new_projection_part->is_temp = false; // clean up will be done on parent part
new_projection_part->setColumns(projection->getColumns(), {}, metadata_snapshot->getMetadataVersion());
auto new_projection_part_storage = new_projection_part->getDataPartStoragePtr();
if (new_projection_part_storage->exists())
{
throw Exception(
ErrorCodes::DIRECTORY_ALREADY_EXISTS,
"Could not flush projection part {}. Projection part in {} already exists",
projection_name,
new_projection_part_storage->getFullPath());
}
new_projection_part_storage->createDirectories();
const auto & desc = projections.get(name);
auto projection_compression_codec = storage.getContext()->chooseCompressionCodec(0, 0);
auto projection_indices = MergeTreeIndexFactory::instance().getMany(desc.metadata->getSecondaryIndices());
MergedBlockOutputStream projection_out(
new_projection_part, desc.metadata,
new_projection_part->getColumns(), projection_indices,
projection_compression_codec, NO_TRANSACTION_PTR);
projection_out.write(old_projection_part->block);
projection_out.finalizePart(new_projection_part, false);
new_data_part->addProjectionPart(projection_name, std::move(new_projection_part));
}
}
out.finalizePart(new_data_part, false);
new_data_part_storage->commitTransaction();
return new_data_part_storage;
}
DataPartStoragePtr MergeTreeDataPartInMemory::makeCloneInDetached(const String & prefix,
const StorageMetadataPtr & metadata_snapshot,
const DiskTransactionPtr & disk_transaction) const
{
if (disk_transaction)
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "InMemory parts are not compatible with disk transactions");
String detached_path = *getRelativePathForDetachedPart(prefix, /* broken */ false);
return flushToDisk(detached_path, metadata_snapshot);
}
void MergeTreeDataPartInMemory::renameTo(const String & new_relative_path, bool /* remove_new_dir_if_exists */)
{
getDataPartStorage().setRelativePath(new_relative_path);
}
void MergeTreeDataPartInMemory::calculateEachColumnSizes(ColumnSizeByName & each_columns_size, ColumnSize & total_size) const
{
auto it = checksums.files.find("data.bin");
if (it != checksums.files.end())
total_size.data_uncompressed += it->second.uncompressed_size;
for (const auto & column : columns)
each_columns_size[column.name].data_uncompressed += block.getByName(column.name).column->byteSize();
}
IMergeTreeDataPart::Checksum MergeTreeDataPartInMemory::calculateBlockChecksum() const
{
SipHash hash;
IMergeTreeDataPart::Checksum checksum;
for (const auto & column : block)
column.column->updateHashFast(hash);
checksum.uncompressed_size = block.bytes();
checksum.uncompressed_hash = getSipHash128AsPair(hash);
return checksum;
}
DataPartInMemoryPtr asInMemoryPart(const MergeTreeDataPartPtr & part)
{
return std::dynamic_pointer_cast<const MergeTreeDataPartInMemory>(part);
}
}
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