ClickHouse/dbms/include/DB/Storages/StorageMaterializedView.h
2016-05-16 21:52:24 +03:00

63 lines
2.0 KiB
C++

#pragma once
#include <DB/Storages/StorageView.h>
namespace DB
{
class StorageMaterializedView : public 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_,
bool attach_);
std::string getName() const override { return "MaterializedView"; }
std::string getInnerTableName() const { return ".inner." + table_name; }
StoragePtr getInnerTable() const { return context.getTable(database_name, getInnerTableName()); }
NameAndTypePair getColumn(const String & column_name) const override;
bool hasColumn(const String & column_name) const override;
bool supportsSampling() const override { return getInnerTable()->supportsSampling(); }
bool supportsPrewhere() const override { return getInnerTable()->supportsPrewhere(); }
bool supportsFinal() const override { return getInnerTable()->supportsFinal(); }
bool supportsParallelReplicas() const override { return getInnerTable()->supportsParallelReplicas(); }
bool supportsIndexForIn() const override { return getInnerTable()->supportsIndexForIn(); }
BlockOutputStreamPtr write(ASTPtr query, const Settings & settings) override;
void drop() override;
bool optimize(const String & partition, bool final, const Settings & settings) override;
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;
private:
StorageMaterializedView(
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_,
bool attach_);
};
}