What happens when AUTO_INCREMENT reaches the maximum value?
2024-04-27 08:20:09
Trisha
Laravel
When AUTO_INCREMENT reaches the maximum value in Mysql
If the AUTO_INCREMENT column allows only unique values ??such as a primary key
? An error occurs due to duplication (unique constraint violation).
If the AUTO_INCREMENT column allows duplicate values
? After the maximum value, the maximum value is assigned consecutively.
If the column with AUTO_INCREMENT set in MySQL reaches the maximum value, the same value as the maximum value is automatically assigned after that. Therefore, if a primary key that does not allow duplication of AUTO_INCREMENT is set, key duplication occurs during INSERT, and an error such as ERROR 1062 (23000): Duplicate entry '***' for key 'PRIMARY' occurs. If the AUTO_INCREMENT column allows duplicates, after reaching the maximum value, the row is inserted with the same value as the maximum value.
Please note: You cannot set up circular sequences like MySQL with the CYCLE option in MySQL.
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