ClickHouse/dbms/src/Storages/System/StorageSystemMergeTreeSettings.cpp

#include <DataTypes/DataTypeString.h>
#include <DataTypes/DataTypesNumber.h>
#include <Interpreters/Context.h>
#include <Storages/System/StorageSystemMergeTreeSettings.h>


namespace DB
{

NamesAndTypesList SystemMergeTreeSettings::getNamesAndTypes()
{
    return {
        {"name",    std::make_shared<DataTypeString>()},
        {"value",   std::make_shared<DataTypeString>()},
        {"changed", std::make_shared<DataTypeUInt8>()},
    };
}

void SystemMergeTreeSettings::fillData(MutableColumns & res_columns, const Context & context, const SelectQueryInfo &) const
{
    for (const auto & setting : context.getMergeTreeSettings())
    {
        res_columns[0]->insert(setting.getName().toString());
        res_columns[1]->insert(setting.getValueAsString());
        res_columns[2]->insert(setting.isChanged());
    }
}

}