Splitting a large table into small pieces may lead to better
performance if only part of the data is accessed because less
information is retrieved or updated.

As part of this WL replication will inject into the binary log,
information on table partition (partition_id)and make it visible
through mysqlbinlog.

In particular, an external tool may need to take into account Innodb
Partitions to support change propagation on partitioned tables.