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Signed-off-by: wjhuang2016 <huangwenjun1997@gmail.com>
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wjhuang2016 committed Aug 10, 2021
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Expand Up @@ -190,6 +190,7 @@ DROP INDEX idx1 ON t1;
> 表达式索引不能为主键。
>
> 表达式索引中的表达式不能包含以下内容:
>
> - 易变函数,例如 `rand()``now()` 等。
> - 系统变量以及用户变量。
> - 子查询。
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