function getGlobalStorageValue(key, parser)
    local valueQuery = db.storeQuery("SELECT `value` FROM `global_storage` WHERE `key` = " .. key .. ";")
    if not valueQuery then
        if parser then
            return false
        else
            return -1
        end
    end
    local value = result.getDataInt(valueQuery, "value")
    result.free(valueQuery)
    return tonumber(value) or value
end

function setGlobalStorageValue(key, value)
    if getGlobalStorageValue(key, true) then
        db.executeQuery("UPDATE `global_storage` SET `value` = '" .. value .. "' WHERE `key` = " .. key .. ";")
    else
        db.executeQuery("INSERT INTO `global_storage` (`key`, `value`) VALUES (" .. key .. ", " .. value .. ");")
    end
    return true
end