Mysql-- index-related

Others 2019-11-19 16:04:49 views: null

Index failure situation:

With the growth of the table, where the conditions out too much data, greater than about 20%, making the index failed (CBO calculation would lead to taking the index is greater than the cost to go the whole table)

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Origin www.cnblogs.com/caoweixiong/p/11890025.html

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