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Posted to dev@flink.apache.org by nick <ni...@nickkarpov.com> on 2021/03/03 22:44:36 UTC

Update operation encoding/format

Hi,

It's mentioned in the following documentation,
https://ci.apache.org/projects/flink/flink-docs-stable/dev/table/connectors/formats/canal.html,
that "...currently Flink can’t combine UPDATE_BEFORE and UPDATE_AFTER into
a single UPDATE message."

Can anyone elaborate on this? Was decomposing a single update into two rows
a specific design decision or more influenced by a technical
limitation/implementation difficulty? The "currently" implies the latter,
and that it may be possible to support this in the future.

Thanks!