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Update ticdc/ticdc-faq.md
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qiancai authored and ti-chi-bot committed Jan 22, 2025
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Expand Up @@ -435,4 +435,4 @@ TiDB 有事务超时的机制,当事务运行超过 [`max-txn-ttl`](/tidb-conf

> **注意:**
>
> 当同步存储生成列到 Kafka 或存储服务后,再将其写回 MySQL 时,可能会遇到 `Error 3105 (HY000): The value specified for generated column 'xx' in table 'xxx' is not allowed` 错误。为避免该错误,你可以使用 [Open Protocol](/ticdc/ticdc-open-protocol.md#ticdc-open-protocol) 进行同步。该协议的输出包含[列的 flag 值](/ticdc/ticdc-open-protocol.md#列标志位),可以区分是否为生成列。
> 当同步存储生成列到 Kafka 或存储服务后,再将其写回 MySQL 时,可能会遇到 `Error 3105 (HY000): The value specified for generated column 'xx' in table 'xxx' is not allowed` 错误。为避免该错误,你可以使用 [Open Protocol](/ticdc/ticdc-open-protocol.md) 进行同步。该协议的输出包含[列的 flag 值](/ticdc/ticdc-open-protocol.md#列标志位),可以区分是否为生成列。

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