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Make UUID() call inside string functions not charset sensetive | ec0888ca-05dd-11e8-84cd-005056aa737d | ec0888cc05dd11e884cd005056aa737d |Īs you can see using REPLACE make UUID return duplicate, but without REPLACE UUID still returns unique values UUIDs generated below validates using OSSP UUID Tool, and output for. Values in this column should be unique and not null. | def085dd-05dd-11e8-84cd-005056aa737d | def0824905dd11e884cd005056aa737d | Therefore, it is possible that this function does not return unique ID for the. 1 In mysql database I have user table and I need to add userkey column where values will be computed as uuid (). Mysql> SELECT UUID() AS unique_column, REPLACE(UUID(), '-', '') AS non_unique_column FROM a Mysql> CREATE TABLE a ( `value` INT NOT NULL ) 1) Create table and fill it with more then one row

If use call to UUID() function inside any string function (like CONCAT or REPLACE) with connection charset = 'utf8mb4' then value of uuid is not unique for each row. To summarize, MySQL does not have special data types for IPv6 addresses or UUIDs but instead encourages the use of VARBINARY(16).