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#pragma once
#include <Core/Field.h>
namespace DB
{
struct SettingChange
{
String name;
Field value;
SettingChange() = default;
SettingChange(std::string_view name_, const Field & value_) : name(name_), value(value_) {}
SettingChange(std::string_view name_, Field && value_) : name(name_), value(std::move(value_)) {}
friend bool operator ==(const SettingChange & lhs, const SettingChange & rhs) { return (lhs.name == rhs.name) && (lhs.value == rhs.value); }
friend bool operator !=(const SettingChange & lhs, const SettingChange & rhs) { return !(lhs == rhs); }
};
class SettingsChanges : public std::vector<SettingChange>
{
public:
using std::vector<SettingChange>::vector;
bool tryGet(std::string_view name, Field & out_value) const;
const Field * tryGet(std::string_view name) const;
Field * tryGet(std::string_view name);
/// Inserts element if doesn't exists and returns true, otherwise just returns false
bool insertSetting(std::string_view name, const Field & value);
/// Sets element to value, inserts if doesn't exist
void setSetting(std::string_view name, const Field & value);
/// If element exists - removes it and returns true, otherwise returns false
bool removeSetting(std::string_view name);
};
}
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