Jark Wu created FLINK-20205: ------------------------------- Summary: CDC source shouldn't send UPDATE_BEFORE messages if the downstream doesn't need it Key: FLINK-20205 URL: https://issues.apache.org/jira/browse/FLINK-20205 Project: Flink Issue Type: Bug Components: Table SQL / Planner Reporter: Jark Wu Fix For: 1.12.0
Currently, the CDC source will always generate UPDATE_BEFORE and UPDATE_AFTER messages for update. However, many downstream operators don't need the UDPATE_BEFORE, e.g. temporal join and upsert sink. Currently, {{debezium-cdc-source => upsert-kafka}} will generate lots of tombstone messages, which is quite not efficient. -- This message was sent by Atlassian Jira (v8.3.4#803005)