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#include <DataTypes/DataTypeString.h>
#include <DataTypes/DataTypesNumber.h>
#include <DataTypes/DataTypeNullable.h>
#include <Interpreters/Context.h>
#include <Storages/System/StorageSystemMergeTreeSettings.h>
#include <Access/SettingsConstraintsAndProfileIDs.h>
namespace DB
{
template <bool replicated>
NamesAndTypesList SystemMergeTreeSettings<replicated>::getNamesAndTypes()
{
return {
{"name", std::make_shared<DataTypeString>()},
{"value", std::make_shared<DataTypeString>()},
{"changed", std::make_shared<DataTypeUInt8>()},
{"description", std::make_shared<DataTypeString>()},
{"min", std::make_shared<DataTypeNullable>(std::make_shared<DataTypeString>())},
{"max", std::make_shared<DataTypeNullable>(std::make_shared<DataTypeString>())},
{"readonly", std::make_shared<DataTypeUInt8>()},
{"type", std::make_shared<DataTypeString>()},
{"is_obsolete", std::make_shared<DataTypeUInt8>()},
};
}
template <bool replicated>
void SystemMergeTreeSettings<replicated>::fillData(MutableColumns & res_columns, ContextPtr context, const SelectQueryInfo &) const
{
const auto & settings = replicated ? context->getReplicatedMergeTreeSettings() : context->getMergeTreeSettings();
auto constraints_and_current_profiles = context->getSettingsConstraintsAndCurrentProfiles();
const auto & constraints = constraints_and_current_profiles->constraints;
for (const auto & setting : settings.all())
{
const auto & setting_name = setting.getName();
res_columns[0]->insert(setting_name);
res_columns[1]->insert(setting.getValueString());
res_columns[2]->insert(setting.isValueChanged());
res_columns[3]->insert(setting.getDescription());
Field min, max;
SettingConstraintWritability writability = SettingConstraintWritability::WRITABLE;
constraints.get(settings, setting_name, min, max, writability);
/// These two columns can accept strings only.
if (!min.isNull())
min = Settings::valueToStringUtil(setting_name, min);
if (!max.isNull())
max = Settings::valueToStringUtil(setting_name, max);
res_columns[4]->insert(min);
res_columns[5]->insert(max);
res_columns[6]->insert(writability == SettingConstraintWritability::CONST);
res_columns[7]->insert(setting.getTypeName());
res_columns[8]->insert(setting.isObsolete());
}
}
template class SystemMergeTreeSettings<false>;
template class SystemMergeTreeSettings<true>;
}
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