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ticdc: add note to the Avro protocol #19636

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Jan 22, 2025
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ticdc: add note to the Avro protocol #19636

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Update ticdc-avro-protocol.md
wk989898 Jan 21, 2025
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Update ticdc/ticdc-avro-protocol.md
wk989898 Jan 22, 2025
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format udpates
qiancai Jan 22, 2025
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Expand Up @@ -81,6 +81,7 @@ Value 数据格式默认与 Key 数据格式相同，但是 Value 的 `fields`
> - 对于 Delete 事件，只编码 Key 部分，Value 部分为空。
> - 对于 Insert 事件，编码所有列数据到 Value 部分。
> - 对于 Update 事件，只编码更新后的所有列数据到 Value 部分。
> - Avro 协议不会对 Insert 和 Delete 事件的旧值进行编码。此外，为了与大多数仅在删除时识别空记录（"delete.on.null"）的 Confluent sink 连接器兼容，即使启用了 enable-tidb-extension 选项，delete 事件也不包含 TiDB 扩展字段信息，例如 _tidb_commit_ts。如果您需要这些功能，请考虑使用其他协议，例如 Canal-JSON 或 Debezium。
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## TiDB 扩展字段

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