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

Jump to bottom

ticdc: fix the description of safe-mode (#13792) #13811

Merged
merged 1 commit into from
Apr 26, 2023
Merged

ticdc: fix the description of safe-mode (#13792) #13811

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.
Jump to
Jump to file
Failed to load files.
Diff view
Diff view
2 changes: 1 addition & 1 deletion ticdc/ticdc-faq.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -228,7 +228,7 @@ mysql root@127.0.0.1:test> show create table test;

产生表结构不一致的原因是 `explicit_defaults_for_timestamp` 的[默认值在 TiDB 和 MySQL 5.7 不同](/mysql-compatibility.md#默认设置)。从 TiCDC v5.0.1/v4.0.13 版本开始，同步到 MySQL 会自动设置 session 变量 `explicit_defaults_for_timestamp = ON`，保证同步时间类型时上下游行为一致。对于 v5.0.1/v4.0.13 以前的版本，同步时间类型时需要注意 `explicit_defaults_for_timestamp` 默认值不同带来的兼容性问题。

## 使用 TiCDC 创建同步任务时将 `enable-old-value` 设置为 `true` 后，为什么上游的 `INSERT`/`UPDATE` 语句经 TiCDC 同步到下游后变为了 `REPLACE INTO`？
## 使用 TiCDC 创建同步任务时将 `safe-mode` 设置为 `true` 后，为什么上游的 `INSERT`/`UPDATE` 语句经 TiCDC 同步到下游后变为了 `REPLACE INTO`？

TiCDC 创建 changefeed 时会默认指定 `safe-mode` 为 `true`，从而为上游的 `INSERT`/`UPDATE` 语句生成 `REPLACE INTO` 的执行语句。

Expand Down