Fixing the MySQL Error “Specified key was too long”

Date: 2023-09-13

MySQL's "Specified key was too long" error arises when creating indexes on columns exceeding the storage engine's maximum index length (often 767 bytes). Solutions include using a character set like utf8mb4 with a smaller footprint, reducing column length, employing prefix indexes to index only part of a column, switching storage engines, or dropping and recreating indexes. Understanding character sets and collations is crucial for managing this issue effectively. Careful consideration and testing are vital when modifying indexes in a production environment.

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