ClickHouse/src/Common/SettingsChanges.h

#pragma once

#include <Core/Field.h>


namespace DB
{

class IColumn;

struct SettingChange
{
    String name;
    Field value;

    SettingChange() = default;
    SettingChange(const std::string_view & name_, const Field & value_) : name(name_), value(value_) {}
    SettingChange(const 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(const std::string_view & name, Field & out_value) const;
    const Field * tryGet(const std::string_view & name) const;
    Field * tryGet(const std::string_view & name);
};

}