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689 lines
22 KiB
C++
689 lines
22 KiB
C++
#include <Storages/StorageLog.h>
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#include <Storages/StorageFactory.h>
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#include <Common/Exception.h>
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#include <Common/StringUtils/StringUtils.h>
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#include <Common/typeid_cast.h>
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#include <Interpreters/evaluateConstantExpression.h>
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#include <IO/ReadBufferFromFileBase.h>
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#include <IO/WriteBufferFromFileBase.h>
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#include <Compression/CompressedReadBuffer.h>
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#include <Compression/CompressedWriteBuffer.h>
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#include <IO/ReadHelpers.h>
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#include <IO/WriteHelpers.h>
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#include <DataTypes/NestedUtils.h>
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#include <DataStreams/IBlockInputStream.h>
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#include <DataStreams/IBlockOutputStream.h>
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#include <Columns/ColumnArray.h>
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#include <Interpreters/Context.h>
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#include <Parsers/ASTLiteral.h>
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#include "StorageLogSettings.h"
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#include <Processors/Sources/SourceWithProgress.h>
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#include <Processors/Pipe.h>
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#define DBMS_STORAGE_LOG_DATA_FILE_EXTENSION ".bin"
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#define DBMS_STORAGE_LOG_MARKS_FILE_NAME "__marks.mrk"
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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 LOGICAL_ERROR;
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extern const int DUPLICATE_COLUMN;
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extern const int SIZES_OF_MARKS_FILES_ARE_INCONSISTENT;
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extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
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extern const int INCORRECT_FILE_NAME;
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}
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class LogSource final : public SourceWithProgress
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{
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public:
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static Block getHeader(const NamesAndTypesList & columns)
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{
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Block res;
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for (const auto & name_type : columns)
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res.insert({ name_type.type->createColumn(), name_type.type, name_type.name });
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return Nested::flatten(res);
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}
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LogSource(
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size_t block_size_, const NamesAndTypesList & columns_, StorageLog & storage_,
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size_t mark_number_, size_t rows_limit_, size_t max_read_buffer_size_)
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: SourceWithProgress(getHeader(columns_)),
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block_size(block_size_),
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columns(columns_),
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storage(storage_),
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mark_number(mark_number_),
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rows_limit(rows_limit_),
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max_read_buffer_size(max_read_buffer_size_)
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{
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}
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String getName() const override { return "Log"; }
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protected:
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Chunk generate() override;
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private:
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size_t block_size;
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NamesAndTypesList columns;
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StorageLog & storage;
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size_t mark_number; /// from what mark to read data
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size_t rows_limit; /// The maximum number of rows that can be read
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size_t rows_read = 0;
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size_t max_read_buffer_size;
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struct Stream
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{
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Stream(const DiskPtr & disk, const String & data_path, size_t offset, size_t max_read_buffer_size_)
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: plain(disk->readFile(data_path, std::min(max_read_buffer_size_, disk->getFileSize(data_path)))),
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compressed(*plain)
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{
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if (offset)
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plain->seek(offset, SEEK_SET);
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}
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std::unique_ptr<ReadBufferFromFileBase> plain;
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CompressedReadBuffer compressed;
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};
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using FileStreams = std::map<String, Stream>;
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FileStreams streams;
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using DeserializeState = IDataType::DeserializeBinaryBulkStatePtr;
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using DeserializeStates = std::map<String, DeserializeState>;
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DeserializeStates deserialize_states;
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void readData(const String & name, const IDataType & type, IColumn & column, size_t max_rows_to_read);
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};
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class LogBlockOutputStream final : public IBlockOutputStream
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{
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public:
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explicit LogBlockOutputStream(StorageLog & storage_, const StorageMetadataPtr & metadata_snapshot_)
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: storage(storage_)
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, metadata_snapshot(metadata_snapshot_)
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, lock(storage.rwlock)
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, marks_stream(
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storage.disk->writeFile(storage.marks_file_path, 4096, WriteMode::Rewrite))
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{
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}
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~LogBlockOutputStream() override
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{
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try
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{
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if (!done)
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{
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/// Rollback partial writes.
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streams.clear();
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storage.file_checker.repair();
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}
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}
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catch (...)
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{
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tryLogCurrentException(__PRETTY_FUNCTION__);
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}
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}
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Block getHeader() const override { return metadata_snapshot->getSampleBlock(); }
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void write(const Block & block) override;
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void writeSuffix() override;
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private:
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StorageLog & storage;
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StorageMetadataPtr metadata_snapshot;
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std::unique_lock<std::shared_mutex> lock;
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bool done = false;
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struct Stream
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{
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Stream(const DiskPtr & disk, const String & data_path, CompressionCodecPtr codec, size_t max_compress_block_size) :
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plain(disk->writeFile(data_path, max_compress_block_size, WriteMode::Append)),
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compressed(*plain, std::move(codec), max_compress_block_size),
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plain_offset(disk->getFileSize(data_path))
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{
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}
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std::unique_ptr<WriteBuffer> plain;
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CompressedWriteBuffer compressed;
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size_t plain_offset; /// How many bytes were in the file at the time the LogBlockOutputStream was created.
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void finalize()
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{
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compressed.next();
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plain->next();
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}
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};
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using Mark = StorageLog::Mark;
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using MarksForColumns = std::vector<std::pair<size_t, Mark>>;
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using FileStreams = std::map<String, Stream>;
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FileStreams streams;
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using WrittenStreams = std::set<String>;
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std::unique_ptr<WriteBuffer> marks_stream; /// Declared below `lock` to make the file open when rwlock is captured.
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using SerializeState = IDataType::SerializeBinaryBulkStatePtr;
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using SerializeStates = std::map<String, SerializeState>;
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SerializeStates serialize_states;
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IDataType::OutputStreamGetter createStreamGetter(const String & name, WrittenStreams & written_streams);
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void writeData(const String & name, const IDataType & type, const IColumn & column,
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MarksForColumns & out_marks,
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WrittenStreams & written_streams);
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void writeMarks(MarksForColumns && marks);
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};
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Chunk LogSource::generate()
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{
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Block res;
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if (rows_read == rows_limit)
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return {};
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if (storage.disk->isDirectoryEmpty(storage.table_path))
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return {};
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/// How many rows to read for the next block.
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size_t max_rows_to_read = std::min(block_size, rows_limit - rows_read);
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for (const auto & name_type : columns)
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{
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MutableColumnPtr column = name_type.type->createColumn();
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try
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{
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readData(name_type.name, *name_type.type, *column, max_rows_to_read);
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}
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catch (Exception & e)
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{
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e.addMessage("while reading column " + name_type.name + " at " + fullPath(storage.disk, storage.table_path));
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throw;
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}
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if (!column->empty())
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res.insert(ColumnWithTypeAndName(std::move(column), name_type.type, name_type.name));
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}
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if (res)
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rows_read += res.rows();
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if (!res || rows_read == rows_limit)
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{
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/** Close the files (before destroying the object).
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* When many sources are created, but simultaneously reading only a few of them,
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* buffers don't waste memory.
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*/
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streams.clear();
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}
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res = Nested::flatten(res);
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UInt64 num_rows = res.rows();
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return Chunk(res.getColumns(), num_rows);
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}
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void LogSource::readData(const String & name, const IDataType & type, IColumn & column, size_t max_rows_to_read)
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{
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IDataType::DeserializeBinaryBulkSettings settings; /// TODO Use avg_value_size_hint.
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auto create_string_getter = [&](bool stream_for_prefix)
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{
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return [&, stream_for_prefix] (const IDataType::SubstreamPath & path) -> ReadBuffer *
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{
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String stream_name = IDataType::getFileNameForStream(name, path);
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const auto & file_it = storage.files.find(stream_name);
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if (storage.files.end() == file_it)
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throw Exception("Logical error: no information about file " + stream_name + " in StorageLog", ErrorCodes::LOGICAL_ERROR);
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UInt64 offset = 0;
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if (!stream_for_prefix && mark_number)
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offset = file_it->second.marks[mark_number].offset;
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auto & data_file_path = file_it->second.data_file_path;
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auto it = streams.try_emplace(stream_name, storage.disk, data_file_path, offset, max_read_buffer_size).first;
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return &it->second.compressed;
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};
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};
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if (deserialize_states.count(name) == 0)
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{
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settings.getter = create_string_getter(true);
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type.deserializeBinaryBulkStatePrefix(settings, deserialize_states[name]);
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}
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settings.getter = create_string_getter(false);
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type.deserializeBinaryBulkWithMultipleStreams(column, max_rows_to_read, settings, deserialize_states[name]);
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}
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void LogBlockOutputStream::write(const Block & block)
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{
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metadata_snapshot->check(block, true);
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/// The set of written offset columns so that you do not write shared offsets of columns for nested structures multiple times
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WrittenStreams written_streams;
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MarksForColumns marks;
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marks.reserve(storage.file_count);
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for (size_t i = 0; i < block.columns(); ++i)
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{
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const ColumnWithTypeAndName & column = block.safeGetByPosition(i);
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writeData(column.name, *column.type, *column.column, marks, written_streams);
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}
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writeMarks(std::move(marks));
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}
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void LogBlockOutputStream::writeSuffix()
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{
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if (done)
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return;
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WrittenStreams written_streams;
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IDataType::SerializeBinaryBulkSettings settings;
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for (const auto & column : getHeader())
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{
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auto it = serialize_states.find(column.name);
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if (it != serialize_states.end())
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{
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settings.getter = createStreamGetter(column.name, written_streams);
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column.type->serializeBinaryBulkStateSuffix(settings, it->second);
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}
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}
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/// Finish write.
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marks_stream->next();
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for (auto & name_stream : streams)
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name_stream.second.finalize();
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Strings column_files;
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for (const auto & name_stream : streams)
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column_files.push_back(storage.files[name_stream.first].data_file_path);
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column_files.push_back(storage.marks_file_path);
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for (const auto & file : column_files)
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storage.file_checker.update(file);
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storage.file_checker.save();
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streams.clear();
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done = true;
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}
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IDataType::OutputStreamGetter LogBlockOutputStream::createStreamGetter(const String & name,
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WrittenStreams & written_streams)
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{
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return [&] (const IDataType::SubstreamPath & path) -> WriteBuffer *
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{
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String stream_name = IDataType::getFileNameForStream(name, path);
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if (written_streams.count(stream_name))
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return nullptr;
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auto it = streams.find(stream_name);
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if (streams.end() == it)
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throw Exception("Logical error: stream was not created when writing data in LogBlockOutputStream",
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ErrorCodes::LOGICAL_ERROR);
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return &it->second.compressed;
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};
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}
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void LogBlockOutputStream::writeData(const String & name, const IDataType & type, const IColumn & column,
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MarksForColumns & out_marks, WrittenStreams & written_streams)
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{
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IDataType::SerializeBinaryBulkSettings settings;
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type.enumerateStreams([&] (const IDataType::SubstreamPath & path)
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{
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String stream_name = IDataType::getFileNameForStream(name, path);
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if (written_streams.count(stream_name))
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return;
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const auto & columns = metadata_snapshot->getColumns();
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streams.try_emplace(
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stream_name,
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storage.disk,
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storage.files[stream_name].data_file_path,
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columns.getCodecOrDefault(name),
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storage.max_compress_block_size);
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}, settings.path);
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settings.getter = createStreamGetter(name, written_streams);
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if (serialize_states.count(name) == 0)
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type.serializeBinaryBulkStatePrefix(settings, serialize_states[name]);
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type.enumerateStreams([&] (const IDataType::SubstreamPath & path)
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{
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String stream_name = IDataType::getFileNameForStream(name, path);
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if (written_streams.count(stream_name))
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return;
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const auto & file = storage.files[stream_name];
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const auto stream_it = streams.find(stream_name);
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Mark mark;
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mark.rows = (file.marks.empty() ? 0 : file.marks.back().rows) + column.size();
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mark.offset = stream_it->second.plain_offset + stream_it->second.plain->count();
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out_marks.emplace_back(file.column_index, mark);
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}, settings.path);
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type.serializeBinaryBulkWithMultipleStreams(column, 0, 0, settings, serialize_states[name]);
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type.enumerateStreams([&] (const IDataType::SubstreamPath & path)
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{
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String stream_name = IDataType::getFileNameForStream(name, path);
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if (!written_streams.emplace(stream_name).second)
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return;
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auto it = streams.find(stream_name);
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if (streams.end() == it)
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throw Exception("Logical error: stream was not created when writing data in LogBlockOutputStream", ErrorCodes::LOGICAL_ERROR);
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it->second.compressed.next();
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}, settings.path);
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}
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void LogBlockOutputStream::writeMarks(MarksForColumns && marks)
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{
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if (marks.size() != storage.file_count)
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throw Exception("Wrong number of marks generated from block. Makes no sense.", ErrorCodes::LOGICAL_ERROR);
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std::sort(marks.begin(), marks.end(), [](const auto & a, const auto & b) { return a.first < b.first; });
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for (const auto & mark : marks)
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{
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writeIntBinary(mark.second.rows, *marks_stream);
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writeIntBinary(mark.second.offset, *marks_stream);
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size_t column_index = mark.first;
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storage.files[storage.column_names_by_idx[column_index]].marks.push_back(mark.second);
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}
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}
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StorageLog::StorageLog(
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DiskPtr disk_,
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const String & relative_path_,
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const StorageID & table_id_,
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const ColumnsDescription & columns_,
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const ConstraintsDescription & constraints_,
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bool attach,
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size_t max_compress_block_size_)
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: IStorage(table_id_)
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, disk(std::move(disk_))
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, table_path(relative_path_)
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, max_compress_block_size(max_compress_block_size_)
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, file_checker(disk, table_path + "sizes.json")
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{
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StorageInMemoryMetadata storage_metadata;
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storage_metadata.setColumns(columns_);
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storage_metadata.setConstraints(constraints_);
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setInMemoryMetadata(storage_metadata);
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if (relative_path_.empty())
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throw Exception("Storage " + getName() + " requires data path", ErrorCodes::INCORRECT_FILE_NAME);
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if (!attach)
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{
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/// create directories if they do not exist
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disk->createDirectories(table_path);
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}
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else
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{
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try
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{
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file_checker.repair();
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}
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catch (...)
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{
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tryLogCurrentException(__PRETTY_FUNCTION__);
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}
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}
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for (const auto & column : storage_metadata.getColumns().getAllPhysical())
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addFiles(column.name, *column.type);
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marks_file_path = table_path + DBMS_STORAGE_LOG_MARKS_FILE_NAME;
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if (!attach)
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for (const auto & file : files)
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file_checker.setEmpty(file.second.data_file_path);
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}
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void StorageLog::addFiles(const String & column_name, const IDataType & type)
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{
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if (files.end() != files.find(column_name))
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throw Exception("Duplicate column with name " + column_name + " in constructor of StorageLog.",
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ErrorCodes::DUPLICATE_COLUMN);
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IDataType::StreamCallback stream_callback = [&] (const IDataType::SubstreamPath & substream_path)
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{
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String stream_name = IDataType::getFileNameForStream(column_name, substream_path);
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if (!files.count(stream_name))
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{
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ColumnData & column_data = files[stream_name];
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column_data.column_index = file_count;
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column_data.data_file_path = table_path + stream_name + DBMS_STORAGE_LOG_DATA_FILE_EXTENSION;
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column_names_by_idx.push_back(stream_name);
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++file_count;
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}
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};
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IDataType::SubstreamPath substream_path;
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type.enumerateStreams(stream_callback, substream_path);
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}
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void StorageLog::loadMarks()
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{
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std::unique_lock<std::shared_mutex> lock(rwlock);
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if (loaded_marks)
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return;
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using FilesByIndex = std::vector<Files::iterator>;
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FilesByIndex files_by_index(file_count);
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for (Files::iterator it = files.begin(); it != files.end(); ++it)
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files_by_index[it->second.column_index] = it;
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if (disk->exists(marks_file_path))
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{
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size_t file_size = disk->getFileSize(marks_file_path);
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if (file_size % (file_count * sizeof(Mark)) != 0)
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throw Exception("Size of marks file is inconsistent", ErrorCodes::SIZES_OF_MARKS_FILES_ARE_INCONSISTENT);
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size_t marks_count = file_size / (file_count * sizeof(Mark));
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for (auto & file : files_by_index)
|
|
file->second.marks.reserve(marks_count);
|
|
|
|
std::unique_ptr<ReadBuffer> marks_rb = disk->readFile(marks_file_path, 32768);
|
|
while (!marks_rb->eof())
|
|
{
|
|
for (auto & file : files_by_index)
|
|
{
|
|
Mark mark;
|
|
readIntBinary(mark.rows, *marks_rb);
|
|
readIntBinary(mark.offset, *marks_rb);
|
|
file->second.marks.push_back(mark);
|
|
}
|
|
}
|
|
}
|
|
|
|
loaded_marks = true;
|
|
}
|
|
|
|
|
|
void StorageLog::rename(const String & new_path_to_table_data, const StorageID & new_table_id)
|
|
{
|
|
std::unique_lock<std::shared_mutex> lock(rwlock);
|
|
|
|
disk->moveDirectory(table_path, new_path_to_table_data);
|
|
|
|
table_path = new_path_to_table_data;
|
|
file_checker.setPath(table_path + "sizes.json");
|
|
|
|
for (auto & file : files)
|
|
file.second.data_file_path = table_path + fileName(file.second.data_file_path);
|
|
|
|
marks_file_path = table_path + DBMS_STORAGE_LOG_MARKS_FILE_NAME;
|
|
renameInMemory(new_table_id);
|
|
}
|
|
|
|
void StorageLog::truncate(const ASTPtr &, const StorageMetadataPtr & metadata_snapshot, const Context &, TableExclusiveLockHolder &)
|
|
{
|
|
std::shared_lock<std::shared_mutex> lock(rwlock);
|
|
|
|
files.clear();
|
|
file_count = 0;
|
|
loaded_marks = false;
|
|
|
|
disk->clearDirectory(table_path);
|
|
|
|
for (const auto & column : metadata_snapshot->getColumns().getAllPhysical())
|
|
addFiles(column.name, *column.type);
|
|
|
|
file_checker = FileChecker{disk, table_path + "sizes.json"};
|
|
marks_file_path = table_path + DBMS_STORAGE_LOG_MARKS_FILE_NAME;
|
|
}
|
|
|
|
|
|
const StorageLog::Marks & StorageLog::getMarksWithRealRowCount(const StorageMetadataPtr & metadata_snapshot) const
|
|
{
|
|
/// There should be at least one physical column
|
|
const String column_name = metadata_snapshot->getColumns().getAllPhysical().begin()->name;
|
|
const auto column_type = metadata_snapshot->getColumns().getAllPhysical().begin()->type;
|
|
String filename;
|
|
|
|
/** We take marks from first column.
|
|
* If this is a data type with multiple stream, get the first stream, that we assume have real row count.
|
|
* (Example: for Array data type, first stream is array sizes; and number of array sizes is the number of arrays).
|
|
*/
|
|
IDataType::SubstreamPath substream_root_path;
|
|
column_type->enumerateStreams([&](const IDataType::SubstreamPath & substream_path)
|
|
{
|
|
if (filename.empty())
|
|
filename = IDataType::getFileNameForStream(column_name, substream_path);
|
|
}, substream_root_path);
|
|
|
|
Files::const_iterator it = files.find(filename);
|
|
if (files.end() == it)
|
|
throw Exception("Cannot find file " + filename, ErrorCodes::LOGICAL_ERROR);
|
|
|
|
return it->second.marks;
|
|
}
|
|
|
|
Pipes StorageLog::read(
|
|
const Names & column_names,
|
|
const StorageMetadataPtr & metadata_snapshot,
|
|
const SelectQueryInfo & /*query_info*/,
|
|
const Context & context,
|
|
QueryProcessingStage::Enum /*processed_stage*/,
|
|
size_t max_block_size,
|
|
unsigned num_streams)
|
|
{
|
|
metadata_snapshot->check(column_names, getVirtuals(), getStorageID());
|
|
loadMarks();
|
|
|
|
NamesAndTypesList all_columns = Nested::collect(metadata_snapshot->getColumns().getAllPhysical().addTypes(column_names));
|
|
|
|
std::shared_lock<std::shared_mutex> lock(rwlock);
|
|
|
|
Pipes pipes;
|
|
|
|
const Marks & marks = getMarksWithRealRowCount(metadata_snapshot);
|
|
size_t marks_size = marks.size();
|
|
|
|
if (num_streams > marks_size)
|
|
num_streams = marks_size;
|
|
|
|
size_t max_read_buffer_size = context.getSettingsRef().max_read_buffer_size;
|
|
|
|
for (size_t stream = 0; stream < num_streams; ++stream)
|
|
{
|
|
size_t mark_begin = stream * marks_size / num_streams;
|
|
size_t mark_end = (stream + 1) * marks_size / num_streams;
|
|
|
|
size_t rows_begin = mark_begin ? marks[mark_begin - 1].rows : 0;
|
|
size_t rows_end = mark_end ? marks[mark_end - 1].rows : 0;
|
|
|
|
pipes.emplace_back(std::make_shared<LogSource>(
|
|
max_block_size,
|
|
all_columns,
|
|
*this,
|
|
mark_begin,
|
|
rows_end - rows_begin,
|
|
max_read_buffer_size));
|
|
}
|
|
|
|
return pipes;
|
|
}
|
|
|
|
BlockOutputStreamPtr StorageLog::write(const ASTPtr & /*query*/, const StorageMetadataPtr & metadata_snapshot, const Context & /*context*/)
|
|
{
|
|
loadMarks();
|
|
return std::make_shared<LogBlockOutputStream>(*this, metadata_snapshot);
|
|
}
|
|
|
|
CheckResults StorageLog::checkData(const ASTPtr & /* query */, const Context & /* context */)
|
|
{
|
|
std::shared_lock<std::shared_mutex> lock(rwlock);
|
|
return file_checker.check();
|
|
}
|
|
|
|
|
|
void registerStorageLog(StorageFactory & factory)
|
|
{
|
|
StorageFactory::StorageFeatures features{
|
|
.supports_settings = true
|
|
};
|
|
|
|
factory.registerStorage("Log", [](const StorageFactory::Arguments & args)
|
|
{
|
|
if (!args.engine_args.empty())
|
|
throw Exception(
|
|
"Engine " + args.engine_name + " doesn't support any arguments (" + toString(args.engine_args.size()) + " given)",
|
|
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
|
|
|
|
String disk_name = getDiskName(*args.storage_def);
|
|
DiskPtr disk = args.context.getDisk(disk_name);
|
|
|
|
return StorageLog::create(
|
|
disk, args.relative_data_path, args.table_id, args.columns, args.constraints,
|
|
args.attach, args.context.getSettings().max_compress_block_size);
|
|
}, features);
|
|
}
|
|
|
|
}
|