MySQL 5.0 Reference Manual  /  ...  /  Replication and the Query Optimizer

16.4.1.19 Replication and the Query Optimizer

It is possible for the data on the master and slave to become different if a statement is written in such a way that the data modification is nondeterministic; that is, left up the query optimizer. (In general, this is not a good practice, even outside of replication.) Examples of nondeterministic statements include DELETE or UPDATE statements that use LIMIT with no ORDER BY clause; see Section 16.4.1.10, “Replication and LIMIT”, for a detailed discussion of these.

Also see Section B.5.7, “Known Issues in MySQL”.


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