The UUID_TO_BIN() function is used to convert the UUID values from a human-readable format into a compact format for storing it in the databases. NOTE: It is to note that these functions are only available in the MySQL version 8.0 or later. These functions allow us to store UUID values in a compact format (BINARY) and display them in a human-readable format (VARCHAR). We can overcome these issues in MySQL by using the functions given below. It can also cause performance issues because of the unordered values and their size.For example, we can imagine the expression WHERE id = '185e6dfd-1cc8-11eb-9a2c-107d1a24f935' instead of WHERE id = 5. It makes the debugging more difficult.If we store the UUID (16-bytes) values in the databases, it occupies more space/storage than integers (4-bytes) or big integers (8-bytes).Using UUID, we can generate the PRIMARY KEY value of the parent table and insert rows into both tables simultaneously.īesides the advantages, the following are the disadvantages of using UUID for a primary key: For example, if we want to insert data into parent and child tables, we must first insert data into the parent table, get generated id, and then fill record into the child table. It also simplifies replication (logic in the application). Mongodb uuid generator spring data Offline#
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