When using the MIXED format with the READ COMMITTED isolation level, am I safe?
If you use READ COMMITTED or enable innodb_locks_unsafe_for_binlog, you must use row-based binary logging
In the list of
When running in MIXED logging format, the server automatically switches from statement-based to row-based logging under the following conditions
.. the isolation level is not mentioned: http://dev.mysql.com/doc/refman/5.5/en/binary-log-mixed.html
Furthermore, the following bug from 2006/2007 talks about adding an warning or error message if the isolation level is used with the incompatible log format. See link to bug in the comment section
I have tested the combination in MySQL 5.5 and I don't get any warning. So I assume that the row format is used if the isolation is used. Am I right?
The following suggests that it is safe (that ROW will be used when having MIXED). Link to manual in the comments (I can't post more than 2 links)
If you are using InnoDB tables and the transaction isolation level is READ COMMITTED or READ UNCOMMITTED, only row-based logging can be used. It is possible to change the logging format to STATEMENT, but doing so at runtime leads very rapidly to errors because InnoDB can no longer perform inserts.