lvyanquan commented on code in PR #3894:
URL: https://github.com/apache/flink-cdc/pull/3894#discussion_r1929687870
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docs/content.zh/docs/connectors/flink-sources/mysql-cdc.md:
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@@ -422,6 +434,11 @@ Flink SQL> SELECT * FROM orders;
<td>TIMESTAMP_LTZ(3) NOT NULL</td>
<td>当前记录表在数据库中更新的时间。 <br>如果从表的快照而不是 binlog 读取记录，该值将始终为0。</td>
</tr>
+ <tr>
+ <td>row_kind</td>
+ <td>STRING NOT NULL</td>
+ <td>这表示着 changelog 的类型。注意: 下游的 SQL 算子可能会因为添加了 'row_kind'
列而导致数据回撤失败。如果源算子选择输出'row_kind'列，则下游的SQL算子可能会因为无法比较'row_kind'列而失败。建议仅在简单的同步作业中使用此元数据列。<br>'+I'
代表着 INSERT 数据，'-D' 代表着 DELETE 数据，'-U' 代表着 UPDATE_BEFORE 数据以及 '+U' 代表着
UPDATE_AFTER 数据。</td>
Review Comment:
Addressed it.
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