ClickHouse/dbms/Databases/DatabasesCommon.h

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#pragma once
#include <Core/Types.h>
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#include <Parsers/ASTFunction.h>
#include <Parsers/IAST.h>
#include <Storages/IStorage_fwd.h>
#include <Databases/IDatabase.h>
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#include <mutex>
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/// General functionality for several different database engines.
namespace DB
{
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class Context;
/// A base class for databases that manage their own list of tables.
class DatabaseWithOwnTablesBase : public IDatabase
{
public:
bool isTableExist(
const Context & context,
const String & table_name) const override;
StoragePtr tryGetTable(
const Context & context,
const String & table_name) const override;
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bool empty(const Context & context) const override;
void attachTable(const String & table_name, const StoragePtr & table) override;
StoragePtr detachTable(const String & table_name) override;
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DatabaseTablesIteratorPtr getTablesIterator(const Context & context, const FilterByNameFunction & filter_by_table_name) override;
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void shutdown() override;
virtual ~DatabaseWithOwnTablesBase() override;
protected:
mutable std::mutex mutex;
Tables tables;
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Dictionaries dictionaries;
Poco::Logger * log;
DatabaseWithOwnTablesBase(const String & name_, const String & logger);
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void attachTableUnlocked(const String & table_name, const StoragePtr & table);
StoragePtr detachTableUnlocked(const String & table_name);
};
}