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https://github.com/ClickHouse/ClickHouse.git
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450 lines
15 KiB
C++
450 lines
15 KiB
C++
#include <map>
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#include <Poco/Path.h>
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#include <DB/Common/escapeForFileName.h>
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#include <DB/Core/Exception.h>
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#include <DB/Core/ErrorCodes.h>
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#include <DB/IO/ReadHelpers.h>
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#include <DB/IO/WriteHelpers.h>
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#include <DB/DataTypes/DataTypeArray.h>
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#include <DB/DataTypes/DataTypeNested.h>
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#include <DB/Columns/ColumnArray.h>
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#include <DB/Columns/ColumnNested.h>
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#include <DB/Storages/StorageTinyLog.h>
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#include <Poco/DirectoryIterator.h>
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#define DBMS_STORAGE_LOG_DATA_FILE_EXTENSION ".bin"
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namespace DB
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{
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using Poco::SharedPtr;
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TinyLogBlockInputStream::TinyLogBlockInputStream(size_t block_size_, const Names & column_names_, StorageTinyLog & storage_)
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: block_size(block_size_), column_names(column_names_), storage(storage_), finished(false)
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{
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}
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String TinyLogBlockInputStream::getID() const
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{
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std::stringstream res;
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res << "TinyLog(" << storage.getTableName() << ", " << &storage;
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for (const auto & name : column_names)
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res << ", " << name;
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res << ")";
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return res.str();
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}
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Block TinyLogBlockInputStream::readImpl()
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{
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Block res;
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if (finished || (!streams.empty() && streams.begin()->second->compressed.eof()))
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{
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/** Закрываем файлы (ещё до уничтожения объекта).
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* Чтобы при создании многих источников, но одновременном чтении только из нескольких,
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* буферы не висели в памяти.
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*/
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finished = true;
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streams.clear();
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return res;
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}
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{
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/// если в папке нет файлов, то это значит, что таблица пока пуста
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if (Poco::DirectoryIterator(storage.full_path()) == Poco::DirectoryIterator())
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return res;
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}
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/// Если файлы не открыты, то открываем их.
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if (streams.empty())
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for (Names::const_iterator it = column_names.begin(); it != column_names.end(); ++it)
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addStream(*it, *storage.getDataTypeByName(*it));
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/// Указатели на столбцы смещений, общие для столбцов из вложенных структур данных
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typedef std::map<std::string, ColumnPtr> OffsetColumns;
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OffsetColumns offset_columns;
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for (Names::const_iterator it = column_names.begin(); it != column_names.end(); ++it)
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{
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ColumnWithNameAndType column;
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column.name = *it;
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column.type = storage.getDataTypeByName(*it);
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bool read_offsets = true;
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/// Для вложенных структур запоминаем указатели на столбцы со смещениями
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if (const DataTypeArray * type_arr = typeid_cast<const DataTypeArray *>(&*column.type))
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{
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String name = DataTypeNested::extractNestedTableName(column.name);
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if (offset_columns.count(name) == 0)
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offset_columns[name] = new ColumnArray::ColumnOffsets_t;
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else
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read_offsets = false; /// на предыдущих итерациях смещения уже считали вызовом readData
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column.column = new ColumnArray(type_arr->getNestedType()->createColumn(), offset_columns[name]);
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}
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else
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column.column = column.type->createColumn();
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readData(*it, *column.type, *column.column, block_size, 0, read_offsets);
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if (column.column->size())
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res.insert(column);
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}
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if (!res || streams.begin()->second->compressed.eof())
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{
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finished = true;
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streams.clear();
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}
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return res;
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}
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void TinyLogBlockInputStream::addStream(const String & name, const IDataType & type, size_t level)
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{
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/// Для массивов используются отдельные потоки для размеров.
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if (const DataTypeArray * type_arr = typeid_cast<const DataTypeArray *>(&type))
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{
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String size_name = DataTypeNested::extractNestedTableName(name) + ARRAY_SIZES_COLUMN_NAME_SUFFIX + toString(level);
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if (!streams.count(size_name))
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streams.emplace(size_name, std::unique_ptr<Stream>(new Stream(storage.files[size_name].data_file.path())));
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addStream(name, *type_arr->getNestedType(), level + 1);
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}
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else if (const DataTypeNested * type_nested = typeid_cast<const DataTypeNested *>(&type))
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{
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String size_name = name + ARRAY_SIZES_COLUMN_NAME_SUFFIX + toString(level);
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streams[size_name].reset(new Stream(storage.files[size_name].data_file.path()));
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const NamesAndTypesList & columns = *type_nested->getNestedTypesList();
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for (NamesAndTypesList::const_iterator it = columns.begin(); it != columns.end(); ++it)
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addStream(DataTypeNested::concatenateNestedName(name, it->name), *it->type, level + 1);
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}
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else
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streams[name].reset(new Stream(storage.files[name].data_file.path()));
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}
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void TinyLogBlockInputStream::readData(const String & name, const IDataType & type, IColumn & column, size_t limit, size_t level, bool read_offsets)
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{
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/// Для массивов требуется сначала десериализовать размеры, а потом значения.
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if (const DataTypeArray * type_arr = typeid_cast<const DataTypeArray *>(&type))
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{
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if (read_offsets)
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{
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type_arr->deserializeOffsets(
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column,
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streams[DataTypeNested::extractNestedTableName(name) + ARRAY_SIZES_COLUMN_NAME_SUFFIX + toString(level)]->compressed,
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limit);
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}
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if (column.size())
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{
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IColumn & nested_column = typeid_cast<ColumnArray &>(column).getData();
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size_t nested_limit = typeid_cast<ColumnArray &>(column).getOffsets()[column.size() - 1];
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readData(name, *type_arr->getNestedType(), nested_column, nested_limit, level + 1);
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if (nested_column.size() != nested_limit)
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throw Exception("Cannot read array data for all offsets", ErrorCodes::CANNOT_READ_ALL_DATA);
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}
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}
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else if (const DataTypeNested * type_nested = typeid_cast<const DataTypeNested *>(&type))
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{
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type_nested->deserializeOffsets(
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column,
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streams[name + ARRAY_SIZES_COLUMN_NAME_SUFFIX + toString(level)]->compressed,
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limit);
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if (column.size())
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{
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ColumnNested & column_nested = typeid_cast<ColumnNested &>(column);
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NamesAndTypesList::const_iterator it = type_nested->getNestedTypesList()->begin();
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for (size_t i = 0; i < column_nested.getData().size(); ++i, ++it)
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{
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readData(
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DataTypeNested::concatenateNestedName(name, it->name),
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*it->type,
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*column_nested.getData()[i],
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column_nested.getOffsets()[column.size() - 1],
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level + 1);
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}
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}
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}
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else
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type.deserializeBinary(column, streams[name]->compressed, limit);
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}
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TinyLogBlockOutputStream::TinyLogBlockOutputStream(StorageTinyLog & storage_)
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: storage(storage_)
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{
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for (const auto & col : storage.getColumnsList())
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addStream(col.name, *col.type);
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}
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void TinyLogBlockOutputStream::addStream(const String & name, const IDataType & type, size_t level)
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{
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/// Для массивов используются отдельные потоки для размеров.
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if (const DataTypeArray * type_arr = typeid_cast<const DataTypeArray *>(&type))
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{
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String size_name = DataTypeNested::extractNestedTableName(name) + ARRAY_SIZES_COLUMN_NAME_SUFFIX + toString(level);
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if (!streams.count(size_name))
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streams.emplace(size_name, std::unique_ptr<Stream>(new Stream(storage.files[size_name].data_file.path(), storage.max_compress_block_size)));
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addStream(name, *type_arr->getNestedType(), level + 1);
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}
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else if (const DataTypeNested * type_nested = typeid_cast<const DataTypeNested *>(&type))
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{
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String size_name = name + ARRAY_SIZES_COLUMN_NAME_SUFFIX + toString(level);
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streams[size_name].reset(new Stream(storage.files[size_name].data_file.path(), storage.max_compress_block_size));
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const NamesAndTypesList & columns = *type_nested->getNestedTypesList();
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for (NamesAndTypesList::const_iterator it = columns.begin(); it != columns.end(); ++it)
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addStream(DataTypeNested::concatenateNestedName(name, it->name), *it->type, level + 1);
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}
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else
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streams[name].reset(new Stream(storage.files[name].data_file.path(), storage.max_compress_block_size));
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}
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void TinyLogBlockOutputStream::writeData(const String & name, const IDataType & type, const IColumn & column,
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OffsetColumns & offset_columns, size_t level)
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{
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/// Для массивов требуется сначала сериализовать размеры, а потом значения.
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if (const DataTypeArray * type_arr = typeid_cast<const DataTypeArray *>(&type))
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{
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String size_name = DataTypeNested::extractNestedTableName(name) + ARRAY_SIZES_COLUMN_NAME_SUFFIX + toString(level);
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if (offset_columns.count(size_name) == 0)
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{
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offset_columns.insert(size_name);
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type_arr->serializeOffsets(
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column,
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streams[size_name]->compressed);
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}
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writeData(name, *type_arr->getNestedType(), typeid_cast<const ColumnArray &>(column).getData(), offset_columns, level + 1);
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}
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else if (const DataTypeNested * type_nested = typeid_cast<const DataTypeNested *>(&type))
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{
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String size_name = name + ARRAY_SIZES_COLUMN_NAME_SUFFIX + toString(level);
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type_nested->serializeOffsets(column, streams[size_name]->compressed);
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const ColumnNested & column_nested = typeid_cast<const ColumnNested &>(column);
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NamesAndTypesList::const_iterator it = type_nested->getNestedTypesList()->begin();
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for (size_t i = 0; i < column_nested.getData().size(); ++i, ++it)
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{
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writeData(
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DataTypeNested::concatenateNestedName(name, it->name),
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*it->type,
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*column_nested.getData()[i],
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offset_columns,
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level + 1);
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}
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}
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else
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type.serializeBinary(column, streams[name]->compressed);
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}
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void TinyLogBlockOutputStream::writeSuffix()
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{
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/// Заканчиваем запись.
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for (FileStreams::iterator it = streams.begin(); it != streams.end(); ++it)
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it->second->finalize();
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std::vector<Poco::File> column_files;
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for (auto & pair : streams)
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column_files.push_back(storage.files[pair.first].data_file);
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storage.file_checker.update(column_files.begin(), column_files.end());
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streams.clear();
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}
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void TinyLogBlockOutputStream::write(const Block & block)
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{
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storage.check(block, true);
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/// Множество записанных столбцов со смещениями, чтобы не писать общие для вложенных структур столбцы несколько раз
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OffsetColumns offset_columns;
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for (size_t i = 0; i < block.columns(); ++i)
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{
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const ColumnWithNameAndType & column = block.getByPosition(i);
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writeData(column.name, *column.type, *column.column, offset_columns);
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}
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}
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StorageTinyLog::StorageTinyLog(
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const std::string & path_,
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const std::string & name_,
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NamesAndTypesListPtr columns_,
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const NamesAndTypesList & materialized_columns_,
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const NamesAndTypesList & alias_columns_,
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const ColumnDefaults & column_defaults_,
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bool attach,
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size_t max_compress_block_size_)
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: IStorage{materialized_columns_, alias_columns_, column_defaults_},
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path(path_), name(name_), columns(columns_),
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max_compress_block_size(max_compress_block_size_),
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file_checker(path + escapeForFileName(name) + '/' + "sizes.json", *this),
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log(&Logger::get("StorageTinyLog"))
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{
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if (columns->empty())
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throw Exception("Empty list of columns passed to StorageTinyLog constructor", ErrorCodes::EMPTY_LIST_OF_COLUMNS_PASSED);
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String full_path = path + escapeForFileName(name) + '/';
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if (!attach)
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{
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/// создаём файлы, если их нет
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if (0 != mkdir(full_path.c_str(), S_IRWXU | S_IRWXG | S_IRWXO) && errno != EEXIST)
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throwFromErrno("Cannot create directory " + full_path, ErrorCodes::CANNOT_CREATE_DIRECTORY);
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}
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for (const auto & col : getColumnsList())
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addFile(col.name, *col.type);
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}
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StoragePtr StorageTinyLog::create(
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const std::string & path_,
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const std::string & name_,
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NamesAndTypesListPtr columns_,
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const NamesAndTypesList & materialized_columns_,
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const NamesAndTypesList & alias_columns_,
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const ColumnDefaults & column_defaults_,
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bool attach,
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size_t max_compress_block_size_)
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{
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return (new StorageTinyLog{
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path_, name_, columns_,
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materialized_columns_, alias_columns_, column_defaults_,
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attach, max_compress_block_size_
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})->thisPtr();
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}
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void StorageTinyLog::addFile(const String & column_name, const IDataType & type, size_t level)
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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 StorageTinyLog.",
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ErrorCodes::DUPLICATE_COLUMN);
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if (const DataTypeArray * type_arr = typeid_cast<const DataTypeArray *>(&type))
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{
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String size_column_suffix = ARRAY_SIZES_COLUMN_NAME_SUFFIX + toString(level);
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String size_name = DataTypeNested::extractNestedTableName(column_name) + size_column_suffix;
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if (files.end() == files.find(size_name))
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{
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ColumnData column_data;
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files.insert(std::make_pair(size_name, column_data));
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files[size_name].data_file = Poco::File(
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path + escapeForFileName(name) + '/' + escapeForFileName(DataTypeNested::extractNestedTableName(column_name)) + size_column_suffix + DBMS_STORAGE_LOG_DATA_FILE_EXTENSION);
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}
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addFile(column_name, *type_arr->getNestedType(), level + 1);
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}
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else if (const DataTypeNested * type_nested = typeid_cast<const DataTypeNested *>(&type))
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{
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String size_column_suffix = ARRAY_SIZES_COLUMN_NAME_SUFFIX + toString(level);
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ColumnData column_data;
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files.insert(std::make_pair(column_name + size_column_suffix, column_data));
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files[column_name + size_column_suffix].data_file = Poco::File(
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path + escapeForFileName(name) + '/' + escapeForFileName(column_name) + size_column_suffix + DBMS_STORAGE_LOG_DATA_FILE_EXTENSION);
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const NamesAndTypesList & columns = *type_nested->getNestedTypesList();
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for (NamesAndTypesList::const_iterator it = columns.begin(); it != columns.end(); ++it)
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addFile(DataTypeNested::concatenateNestedName(name, it->name), *it->type, level + 1);
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}
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else
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{
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ColumnData column_data;
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files.insert(std::make_pair(column_name, column_data));
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files[column_name].data_file = Poco::File(
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path + escapeForFileName(name) + '/' + escapeForFileName(column_name) + DBMS_STORAGE_LOG_DATA_FILE_EXTENSION);
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}
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}
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void StorageTinyLog::rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name)
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{
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/// Переименовываем директорию с данными.
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Poco::File(path + escapeForFileName(name)).renameTo(new_path_to_db + escapeForFileName(new_table_name));
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path = new_path_to_db;
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name = new_table_name;
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file_checker.setPath(path + escapeForFileName(name) + "/" + "sizes.json");
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for (Files_t::iterator it = files.begin(); it != files.end(); ++it)
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it->second.data_file = Poco::File(path + escapeForFileName(name) + '/' + Poco::Path(it->second.data_file.path()).getFileName());
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}
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BlockInputStreams StorageTinyLog::read(
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const Names & column_names,
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ASTPtr query,
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const Settings & settings,
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QueryProcessingStage::Enum & processed_stage,
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size_t max_block_size,
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unsigned threads)
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{
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check(column_names);
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processed_stage = QueryProcessingStage::FetchColumns;
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return BlockInputStreams(1, new TinyLogBlockInputStream(max_block_size, column_names, *this));
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}
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BlockOutputStreamPtr StorageTinyLog::write(
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ASTPtr query)
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{
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return new TinyLogBlockOutputStream(*this);
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}
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void StorageTinyLog::drop()
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{
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for (Files_t::iterator it = files.begin(); it != files.end(); ++it)
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if (it->second.data_file.exists())
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it->second.data_file.remove();
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}
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bool StorageTinyLog::checkData() const
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{
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return file_checker.check();
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}
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StorageTinyLog::Files_t & StorageTinyLog::getFiles()
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{
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return files;
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}
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TinyLogBlockOutputStream::~TinyLogBlockOutputStream()
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{
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writeSuffix();
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}
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}
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