![]() The cookie is used to store the user consent for the cookies in the category "Analytics". This cookie is set by GDPR Cookie Consent plugin. These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. If for some reason you need UUID v4, it is recommended to let MySQL and InnoDB handle the primary key by enabling GIPK mode. ![]() In summary, if you want to use UUID’s in MySQL, it’s recommended to use UUID v1, those generated by MySQL, and store them as binary using the swap flag. | my_row_id | bin_to_uuid(uuid) | name | beers | It’s possible to also display it on demand: MySQL > SELECT my_row_id, BIN_TO_UUID(uuid), name, beers FROM my_table3 The reason of that optimal sequential insertion is that the invisible Primary Key is an auto_increment. We can see that indeed, the UUIDs are completely random and sequentially added to the table. let’s add some more records: MySQL > INSERT INTO my_table3 (uuid, name, beers) MySQL > SELECT BIN_TO_UUID(uuid), name, beers FROM my_table3 Now let’s insert some records and see if they are inserted sequentially and if the UUID’s value is completely random: MySQL > INSERT INTO my_table3 (uuid, name, beers) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci `my_row_id` bigint unsigned NOT NULL AUTO_INCREMENT /*!80023 INVISIBLE */, MySQL > SET sql_generate_invisible_primary_key=1 GIPK stands for Generated Invisible Primary Key, check the manual for more info. Now we will create a new table, but as recommended, we won’t use the uuid as Primary Key ! We will use a new feature of MySQL 8.0.30: GIPK Mode ! Key_len: 16 install component "file://component_uuid_v4" | 633ecd6f-1f9f-11ed-ba36-c8cb9e32df8e | lefred | 1 |Īnd now we can verify that when we add new entries they are added to the end of the table: MySQL > INSERT INTO my_table2 (name, beers) VALUES ("Scott",1), ("Lenka",5) | 0x11ED1F9F633ECD6FBA36C8CB9E32DF8E | lefred | 1 |Īs the UUID is now binary, we need to decode it using the function BIN_TO_UUID() and not forget the swap flag: MySQL > SELECT BIN_TO_UUID(uuid,1), name, beers FROM my_table2 Uuid BINARY(16) DEFAULT (UUID_TO_BIN(UUID(), 1)) PRIMARY KEY, | 36f1ce9a-1fa1-11ed-ba36-c8cb9e32df8e | Luis | 1 | EXPLAIN SELECT * FROM my_table WHERE We can check the content of the table: MySQL > SELECT * FROM my_table Now, let’s insert 2 new records: MySQL > INSERT INTO my_table (name, beers) VALUES ("Luis",1), ("Miguel",5) Uuid VARCHAR(36) DEFAULT (UUID()) PRIMARY KEY, ![]() ![]() Let’s have a look at this example: MySQL > CREATE TABLE my_table (
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