The discussion in the following paragraphs does not apply when
binlog_format=ROW because, in
that case, temporary tables are not replicated; this means that
there are never any temporary tables on the slave to be lost in
the event of an unplanned shutdown by the slave. The remainder
of this section applies only when using statement-based or
mixed-format replication. Loss of replicated temporary tables on
the slave can be an issue, whenever
statements involving temporary tables that can be logged safely
using statement-based format. For more information about
row-based replication and temporary tables, see
Row-based logging of temporary tables.
Safe slave shutdown when using temporary tables. Temporary tables are replicated except in the case where you stop the slave server (not just the slave threads) and you have replicated temporary tables that are open for use in updates that have not yet been executed on the slave. If you stop the slave server, the temporary tables needed by those updates are no longer available when the slave is restarted. To avoid this problem, do not shut down the slave while it has temporary tables open. Instead, use the following procedure:
STOP SLAVE SQL_THREADstatement.
If the value is not 0, restart the slave SQL thread with
START SLAVE SQL_THREADand repeat the procedure later.
When the value is 0, issue a mysqladmin shutdown command to stop the slave.
Temporary tables and replication options.
By default, all temporary tables are replicated; this happens
whether or not there are any matching
options in effect. However, the
options are honored for temporary tables. The exception is
that to enable correct removal of temporary tables at the end
of a session, a replication slave always replicates a
DROP TEMPORARY TABLE IF EXISTS statement,
regardless of any exclusion rules that would normally apply
for the specified table.
A recommended practice when using statement-based or
mixed-format replication is to designate a prefix for exclusive
use in naming temporary tables that you do not want replicated,
then employ a
option to match that prefix. For example, you might give all
such tables names beginning with
norepyourtable, and so on), then use
to prevent them from being replicated.