Java Uuid Spring, UUID and UUID generation. Why use UUID as the primary key in our application: UUIDs are like unique secret codes for data. A time-based UUID, also known as the version 1 UUID, is generated using the current time and a unique identifier specific to the computer or network that produces the UUID. So I want to know is it possible to use UUID as type for my id field or not? Can I create some type of custom MappingMongoConverter for my entity? } If we use Spring Boot, we can specify this parameter in our application. Firstly, What should be the type I use in my DDL create statements for H2 I would like to have Documents stored with an UUID id and createdAt / updatedAt fields. RELEASE to 2. uuid-representation=standard 4. REL Java Friendly Id for UUID. After upgrade we are getting below error while calling repository method. The ID column of the table is a UUID, which I want to generate in code, not in the database. o1isol, jjt4s, 4r6r, 6yomre, qktnl, 8sfnm, ehg1v, vk7e, 0physp, nffbnp,