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Re: How to handle secondary keys in partitioning?
Posted by: John Smith
Date: May 06, 2010 12:34AM

Thanks.

Can you explain why it is a good idea to do sub-partitioning?

Even with the sub-partitioning, when I do "SELECT * FROM tp WHERE sender_id=1 ORDER BY date" MySQL would still need to read from 5 indexes and then merge sort, which is the same as when there is no sub-partitioning.

What are the advantages of sub-partitioning then?

Thanks.

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