split the update event when using avro or csv protocol #9086
Labels
affects-6.5
This bug affects the 6.5.x(LTS) versions.
affects-7.1
This bug affects the 7.1.x(LTS) versions.
area/ticdc
Issues or PRs related to TiCDC.
component/sink
Sink component.
report/community
The community has encountered this bug.
type/enhancement
The issue or PR belongs to an enhancement.
Avro and CSV Protocol, does not emit the old value for the update event to downstream, so if the primary key is updated, the old data cannot be deleted from the downstream data system.
By split the update event into delete event and insert event, the old data can be delete first, and then insert the new data.
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