Why would you save something that you can’t retrieve later on? What’s the point?
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Why would you save something that you can’t retrieve later on? What’s the point?
It is useful in a replicated environment where all SQL statements are run on all nodes, but you only want some nodes to actually store the result. This is a use case given in the documentation: http://dev.mysql.com/doc/refman/5.0/en/blackhole-storage-engine.html
Other uses given in the documentation include: