ClickHouse/dbms/include/DB/Storages/StorageChunkRef.h
Michael Kolupaev 9aec07070a Merge
2013-02-08 17:06:29 +00:00

46 lines
1.2 KiB
C++

#pragma once
#include <DB/Storages/StorageChunks.h>
namespace DB
{
/** Ссылка на кусок данных в таблице типа Chunks.
* Запись не поддерживается.
*/
class StorageChunkRef : public IStorage
{
public:
static StoragePtr create(const std::string & name_, NamesAndTypesListPtr columns_, Context & context_, const std::string & source_database_name_, const std::string & source_table_name_, bool attach);
std::string getName() const { return "ChunkRef"; }
std::string getTableName() const { return name; }
const NamesAndTypesList & getColumnsList() const { return *columns; }
BlockInputStreams read(
const Names & column_names,
ASTPtr query,
const Settings & settings,
QueryProcessingStage::Enum & processed_stage,
size_t max_block_size = DEFAULT_BLOCK_SIZE,
unsigned threads = 1);
void dropImpl();
String source_database_name;
String source_table_name;
private:
String name;
NamesAndTypesListPtr columns;
Context context;
StorageChunkRef(const std::string & name_, NamesAndTypesListPtr columns_, Context & context_, const std::string & source_database_name_, const std::string & source_table_name_, bool attach);
StorageChunks * getSource();
};
}