mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-10-05 16:10:50 +00:00
150 lines
4.4 KiB
C++
150 lines
4.4 KiB
C++
|
#include <map>
|
|||
|
|
|||
|
#include <DB/Common/escapeForFileName.h>
|
|||
|
|
|||
|
#include <DB/Core/Exception.h>
|
|||
|
#include <DB/Core/ErrorCodes.h>
|
|||
|
|
|||
|
#include <DB/IO/ReadHelpers.h>
|
|||
|
#include <DB/IO/WriteHelpers.h>
|
|||
|
|
|||
|
#include <DB/Storages/StorageTinyLog.h>
|
|||
|
|
|||
|
|
|||
|
#define DBMS_STORAGE_LOG_DATA_FILE_EXTENSION ".bin"
|
|||
|
|
|||
|
|
|||
|
namespace DB
|
|||
|
{
|
|||
|
|
|||
|
using Poco::SharedPtr;
|
|||
|
|
|||
|
|
|||
|
TinyLogBlockInputStream::TinyLogBlockInputStream(size_t block_size_, const Names & column_names_, StorageTinyLog & storage_)
|
|||
|
: block_size(block_size_), column_names(column_names_), storage(storage_)
|
|||
|
{
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
Block TinyLogBlockInputStream::readImpl()
|
|||
|
{
|
|||
|
Block res;
|
|||
|
|
|||
|
/// Если файлы не открыты, то открываем их.
|
|||
|
if (streams.empty())
|
|||
|
{
|
|||
|
for (Names::const_iterator it = column_names.begin(); it != column_names.end(); ++it)
|
|||
|
streams.insert(std::make_pair(*it, new Stream(storage.files[*it].data_file.path())));
|
|||
|
}
|
|||
|
else if (streams[0]->compressed.eof())
|
|||
|
return res;
|
|||
|
|
|||
|
for (Names::const_iterator it = column_names.begin(); it != column_names.end(); ++it)
|
|||
|
{
|
|||
|
ColumnWithNameAndType column;
|
|||
|
column.name = *it;
|
|||
|
column.type = storage.getDataTypeByName(*it);
|
|||
|
column.column = column.type->createColumn();
|
|||
|
column.type->deserializeBinary(*column.column, streams[column.name]->compressed, block_size);
|
|||
|
|
|||
|
if (column.column->size())
|
|||
|
res.insert(column);
|
|||
|
}
|
|||
|
|
|||
|
if (!res || streams[0]->compressed.eof())
|
|||
|
{
|
|||
|
/** Закрываем файлы (ещё до уничтожения объекта).
|
|||
|
* Чтобы при создании многих источников, но одновременном чтении только из нескольких,
|
|||
|
* буферы не висели в памяти.
|
|||
|
*/
|
|||
|
streams.clear();
|
|||
|
}
|
|||
|
|
|||
|
return res;
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
TinyLogBlockOutputStream::TinyLogBlockOutputStream(StorageTinyLog & storage_)
|
|||
|
: storage(storage_)
|
|||
|
{
|
|||
|
for (NamesAndTypesList::const_iterator it = storage.columns->begin(); it != storage.columns->end(); ++it)
|
|||
|
streams.insert(std::make_pair(it->first, new Stream(storage.files[it->first].data_file.path())));
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
void TinyLogBlockOutputStream::write(const Block & block)
|
|||
|
{
|
|||
|
storage.check(block);
|
|||
|
|
|||
|
for (size_t i = 0; i < block.columns(); ++i)
|
|||
|
{
|
|||
|
const ColumnWithNameAndType & column = block.getByPosition(i);
|
|||
|
column.type->serializeBinary(*column.column, streams[column.name]->compressed);
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
StorageTinyLog::StorageTinyLog(const std::string & path_, const std::string & name_, NamesAndTypesListPtr columns_)
|
|||
|
: path(path_), name(name_), columns(columns_)
|
|||
|
{
|
|||
|
if (columns->empty())
|
|||
|
throw Exception("Empty list of columns passed to StorageTinyLog constructor", ErrorCodes::EMPTY_LIST_OF_COLUMNS_PASSED);
|
|||
|
|
|||
|
/// создаём файлы, если их нет
|
|||
|
Poco::File(path + escapeForFileName(name) + '/').createDirectories();
|
|||
|
|
|||
|
for (NamesAndTypesList::const_iterator it = columns->begin(); it != columns->end(); ++it)
|
|||
|
{
|
|||
|
if (files.end() != files.find(it->first))
|
|||
|
throw Exception("Duplicate column with name " + it->first + " in constructor of StorageTinyLog.",
|
|||
|
ErrorCodes::DUPLICATE_COLUMN);
|
|||
|
|
|||
|
ColumnData column_data;
|
|||
|
files.insert(std::make_pair(it->first, column_data));
|
|||
|
files[it->first].data_file = Poco::File(path + escapeForFileName(name) + '/' + escapeForFileName(it->first) + DBMS_STORAGE_LOG_DATA_FILE_EXTENSION);
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
void StorageTinyLog::rename(const String & new_path_to_db, const String & new_name)
|
|||
|
{
|
|||
|
/// Переименовываем директорию с данными.
|
|||
|
Poco::File(path + escapeForFileName(name)).renameTo(new_path_to_db + escapeForFileName(new_name));
|
|||
|
|
|||
|
path = new_path_to_db;
|
|||
|
name = new_name;
|
|||
|
|
|||
|
for (NamesAndTypesList::const_iterator it = columns->begin(); it != columns->end(); ++it)
|
|||
|
files[it->first].data_file = Poco::File(path + escapeForFileName(name) + '/' + escapeForFileName(it->first) + DBMS_STORAGE_LOG_DATA_FILE_EXTENSION);
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
BlockInputStreams StorageTinyLog::read(
|
|||
|
const Names & column_names,
|
|||
|
ASTPtr query,
|
|||
|
QueryProcessingStage::Enum & processed_stage,
|
|||
|
size_t max_block_size,
|
|||
|
unsigned threads)
|
|||
|
{
|
|||
|
check(column_names);
|
|||
|
processed_stage = QueryProcessingStage::FetchColumns;
|
|||
|
return BlockInputStreams(1, new TinyLogBlockInputStream(max_block_size, column_names, *this));
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
BlockOutputStreamPtr StorageTinyLog::write(
|
|||
|
ASTPtr query)
|
|||
|
{
|
|||
|
return new TinyLogBlockOutputStream(*this);
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
void StorageTinyLog::drop()
|
|||
|
{
|
|||
|
for (Files_t::iterator it = files.begin(); it != files.end(); ++it)
|
|||
|
if (it->second.data_file.exists())
|
|||
|
it->second.data_file.remove();
|
|||
|
}
|
|||
|
|
|||
|
}
|