You might find a warning like the below in your error log:
130522 17:54:18 [Warning] Unsafe statement written to the
binary log using statement format since BINLOG_FORMAT =
STATEMENT. Statements writing to a table with an auto-increment
column after selecting from another table are unsafe because the
order in which rows are retrieved determines what (if any) rows
will be written. This order cannot be predicted and may differ on
master and the slave.
Statement: INSERT INTO tbl2 SELECT * FROM tbl1 WHERE col IN (417,523)
What do MariaDB and MySQL mean with this warning? The server can’t guarantee that this exact query, with STATEMENT based replication, will always yield identical results on the slave.
Does that mean that you have to use ROW based (or MIXED) replication? Possibly, but not necessarily.
For this type of query, it primarily refers to the fact that without …[Read more]