MYSQL index column size issue after upgrading from from 5.7 to 8

Question

We have a RDS MYSQL with AWS. After upgrading the mysql fro 5.7 to 8, one of our table has been in error. "Index column size too large. The maximum size is 767 bytes.

We've tried to drop the table, alter, truncate, drop index, all these command responded with the same error above, I'm stuck, please help, Thanks.

Answer 1

That should have been fixed in 5.7 and carried over into 8.0. Please provide SHOW CREATE TABLE , the exact version numbers, and any other details you can think of.

See this for 5 workarounds: http://mysql.rjweb.org/doc.php/limits#767_limit_in_innodb_indexes