mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-12 02:23:14 +00:00
74 lines
2.1 KiB
C++
74 lines
2.1 KiB
C++
#pragma once
|
||
|
||
#include <ext/share_ptr_helper.hpp>
|
||
|
||
#include <DB/Parsers/ASTSelectQuery.h>
|
||
#include <DB/Storages/IStorage.h>
|
||
|
||
|
||
namespace DB
|
||
{
|
||
|
||
class StorageView : private ext::share_ptr_helper<StorageView>, public IStorage
|
||
{
|
||
friend class ext::share_ptr_helper<StorageView>;
|
||
|
||
public:
|
||
static StoragePtr create(
|
||
const String & table_name_,
|
||
const String & database_name_,
|
||
Context & context_,
|
||
ASTPtr & query_,
|
||
NamesAndTypesListPtr columns_,
|
||
const NamesAndTypesList & materialized_columns_,
|
||
const NamesAndTypesList & alias_columns_,
|
||
const ColumnDefaults & column_defaults_);
|
||
|
||
std::string getName() const override { return "View"; }
|
||
std::string getTableName() const override { return table_name; }
|
||
const NamesAndTypesList & getColumnsListImpl() const override { return *columns; }
|
||
ASTPtr getInnerQuery() const { return inner_query.clone(); };
|
||
|
||
/// Пробрасывается внутрь запроса и решается на его уровне.
|
||
bool supportsSampling() const override { return true; }
|
||
bool supportsFinal() const override { return true; }
|
||
|
||
bool supportsParallelReplicas() const override { return true; }
|
||
|
||
BlockInputStreams read(
|
||
const Names & column_names,
|
||
ASTPtr query,
|
||
const Context & context,
|
||
const Settings & settings,
|
||
QueryProcessingStage::Enum & processed_stage,
|
||
size_t max_block_size = DEFAULT_BLOCK_SIZE,
|
||
unsigned threads = 1) override;
|
||
|
||
void drop() override;
|
||
|
||
protected:
|
||
String select_database_name;
|
||
String select_table_name;
|
||
String table_name;
|
||
String database_name;
|
||
ASTSelectQuery inner_query;
|
||
Context & context;
|
||
NamesAndTypesListPtr columns;
|
||
|
||
StorageView(
|
||
const String & table_name_,
|
||
const String & database_name_,
|
||
Context & context_,
|
||
ASTPtr & query_,
|
||
NamesAndTypesListPtr columns_,
|
||
const NamesAndTypesList & materialized_columns_,
|
||
const NamesAndTypesList & alias_columns_,
|
||
const ColumnDefaults & column_defaults_);
|
||
|
||
private:
|
||
/// Достать из самого внутреннего подзапроса имя базы данных и таблицы: select_database_name, select_table_name.
|
||
void extractDependentTable(const ASTSelectQuery & query);
|
||
};
|
||
|
||
}
|