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Re: Using indexes for "IN" clauses with composite values
Posted by: Peter Brawley
Date: April 14, 2014 11:41AM

Since 5.6.5 there is some semi-join optimisation, see https://dev.mysql.com/doc/refman/5.6/en/subquery-optimization.html.

Generally though, optimisation is better when you convert semi-joins like IN() to full joins.

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Re: Using indexes for "IN" clauses with composite values
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April 14, 2014 11:41AM


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