从MySQL 5.0.3版本就有了，可以看看：
http://dev.mysql.com/doc/refman/5.1/en/index-merge-optimization.html
--EOF--
MySQL Index Merge Optimization 索引合并优化
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About this Entry
This page contains a single entry by 谷多 published on April 20, 2008 4:37 PM.
MySQL 5.1 新特性：Row based replication 和 Table logs was the previous entry in this blog.
MySQL UC2008: Scaling MySQL - Up or Out? is the next entry in this blog.
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