Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

op-guide: fix variable description #928

Merged
merged 1 commit into from
Oct 16, 2018
Merged

op-guide: fix variable description #928

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 2 additions & 2 deletions op-guide/history-read.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -100,7 +100,7 @@ TiDB 使用周期性运行的 GC（Garbage Collection，垃圾回收）来进行
> **注意**：
>
> - 这里的时间设置的是 update 语句之前的那个时间。
> - 在 `tidb_snapshot` 前须使用 `@@` 而非 `@`，因为 `@@` 表示全局变量，`@` 表示 Session 变量。
> - 在 `tidb_snapshot` 前须使用 `@@` 而非 `@`，因为 `@@` 表示系统变量，`@` 表示用户变量。

这里读取到的内容即为 update 之前的内容，也就是历史版本：

Expand Down Expand Up @@ -135,4 +135,4 @@ TiDB 使用周期性运行的 GC（Garbage Collection，垃圾回收）来进行
3 rows in set (0.00 sec)
```

> **注意**：在 `tidb_snapshot` 前须使用 `@@` 而非 `@`，因为 `@@` 表示全局变量，`@` 表示 Session 变量。
> **注意**：在 `tidb_snapshot` 前须使用 `@@` 而非 `@`，因为 `@@` 表示系统变量，`@` 表示用户变量。