Home Database Mysql Tutorial 聚集索引更新后会不会马上重新排序

聚集索引更新后会不会马上重新排序

Jun 07, 2016 pm 05:38 PM
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聚集索引更新后会不会马上重新排序 今天在QQ群里有人问到下面问题 提问人用的是MYSQL,不过这个问题让我想起了SQLSERVER的万圣节问题 万圣节问题就是因为更新了非聚集索引之后,非聚集索引迅速排序导致的更新错误问题 详见:SQLSERVER中的假脱机 当时我只是

聚集索引更新后会不会马上重新排序

今天在QQ群里有人问到下面问题

 

提问人用的是MYSQL,,不过这个问题让我想起了SQLSERVER的万圣节问题

万圣节问题就是因为更新了非聚集索引之后,非聚集索引迅速排序导致的更新错误问题

详见:SQLSERVER中的假脱机

当时我只是测试了非聚集索引下面的情况,但是聚集索引下面有没有这种情况呢?

我们修改一下SQLSERVER中的假脱机中的脚本,将建立非聚集索引的那条语句改为建立聚集索引

 

使用下面SQL脚本建立测试环境

1 USE master Spool Halloween 12 ( 13 ID INT IDENTITY(1, 1), 14 Name VARCHAR(30) , 15 Salary NUMERIC(18, 2), 16 Remark NVARCHAR(3000) 17 ) .( , , ) ,, ,, 3000) ix_Halloween ) Halloween 34 GO

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