B.4.4.5 Rollback Failure for Nontransactional Tables
If you receive the following message when trying to perform a
ROLLBACK, it means that one or more of the tables you used in the transaction do not support transactions:
Warning: Some non-transactional changed tables couldn't be rolled back
These nontransactional tables are not affected by the
If you were not deliberately mixing transactional and nontransactional tables within the transaction, the most likely cause for this message is that a table you thought was transactional actually is not. This can happen if you try to create a table using a transactional storage engine that is not supported by your mysqld server (or that was disabled with a startup option). If mysqld does not support a storage engine, it instead creates the table as a
MyISAM table, which is nontransactional.
You can check the storage engine for a table by using either of these statements:
SHOW TABLE STATUS LIKE 'tbl_name'; SHOW CREATE TABLE tbl_name;
To check which storage engines your mysqld server supports, use this statement:
See Section 184.108.40.206, “SHOW ENGINES Statement” for full details.