I studied the MySQL and InnoDB manual, but I did not find anything about
the internal usage of foreign keys.
I mean if I define a foreign key it is good for me, because the InnoDB
engine does not let the database to get integrity errors. But I think the
foreign key definitions could be used in query optimizations, but I did not
find anything about it.
So, are foreign keys used in query optimizations in case of InnoDB
databases to speed up performance?
Thanks,
Daniel Kiss
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