This makes it very convenient and easy to work with the UUID data type from your application code. The C# driver on the other hand will return a struct of type System.GUID. MongoDB drivers usually convert their value as found in the database to language-specific UUID or GUID objects.įor example, when you read a UUID from a MongoDB database using the Java driver, an object of type will be returned. MongoDB itself stores UUIDs as Binary fields and when such Binary fields are accessed from software, MongoDB has built-in support for the UUID data type and most of the MongoDB drivers support UUID natively. (The example above is a random Version 4 UUID generated by Studio 3T) MongoDB and UUID support UUIDs are 128-bit values and are usually displayed as 32 hexadecimal digits separated by hyphens, for example: ![]() Sometimes the term Globally Unique IDentifier ( GUID) is used to describe it.Ī GUID is one of many implementations of the UUID standard. What is a UUID?Ī Universally Unique IDentifier ( UUID) is a unique number used as an identifier in computer software. We’ll make you aware of those configurations and provide you with a set of best practices to follow. We’ll take a closer look at scenarios where working with UUID data in MongoDB might become more complex. It’s also very likely that your data gets corrupted over time and it will be very difficult to recover from such a disaster without having to restore your backups (you do backups on a regular basis, don’t you?). you might no longer be able to match orders to customers. There are some scenarios however, where you might run into unexpected issues that are very difficult to debug.Īs soon as you go multi-language with your deployments you might discover that your applications no longer work as expected, e.g. ![]() In most cases you’ll most likely be fine. It’s very easy and convenient to start using UUID immediately, without having to review the BSON specification. MongoDB and MongoDB drivers come with built-in support for the UUID data type. Download our MongoDB GUI now, in case you haven’t yet.
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