ClickHouse/dbms/src/Storages/System/StorageSystemFunctions.h

32 lines
803 B
C++

#pragma once
#include <DataTypes/DataTypeString.h>
#include <DataTypes/DataTypesNumber.h>
#include <ext/shared_ptr_helper.h>
#include <Storages/System/IStorageSystemOneBlock.h>
namespace DB
{
class Context;
/** Implements `functions`system table, which allows you to get a list
* all normal and aggregate functions.
*/
class StorageSystemFunctions : public ext::shared_ptr_helper<StorageSystemFunctions>, public IStorageSystemOneBlock<StorageSystemFunctions>
{
public:
std::string getName() const override { return "SystemFunctions"; }
static NamesAndTypesList getNamesAndTypes();
protected:
using IStorageSystemOneBlock::IStorageSystemOneBlock;
void fillData(MutableColumns & res_columns, const Context & context, const SelectQueryInfo & query_info) const override;
};
}