ClickHouse/dbms/include/DB/Storages/StorageMaterializedView.h

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C
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#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; }
NameAndTypePair getColumn(const String & column_name) const override;
bool hasColumn(const String & column_name) const override;
bool supportsSampling() const override { return data->supportsSampling(); }
bool supportsFinal() const override { return data->supportsFinal(); }
bool supportsPrewhere() const override { return data->supportsPrewhere(); }
BlockOutputStreamPtr write(ASTPtr query) override;
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void drop() override;
bool optimize() 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:
StoragePtr data;
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_);
};
}