SteNicholas opened a new pull request #14792:
URL: https://github.com/apache/flink/pull/14792
## What is the purpose of the change
*Metadata column of `CanalJsonDecodingFormat` doesn't support to extract the
`es` field of Canal JSON record, which field extracts from MySQL binlog
represent for the row data real change time in MySQL. The `event-timestamp`
metadata column expresses the event time.*
## Brief change log
- *`CanalJsonDecodingFormat` adds `event-timestamp` metadata column for
the `es` field of Canal JSON record.*
## Verifying this change
- *`CanalJsonSerDeSchemaTest` adds the validation to verify whether the
`event-timestamp` metadata column value is equal to the value of `es` field.*
- *`KafkaChangelogTableITCase` adds the `event-timestamp` metadata column
in the DDL of Kafka source table to verify the `event-timestamp` metadata
column could be used as event time.*
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (yes / **no**)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (yes / **no**)
- The serializers: (yes / **no** / don't know)
- The runtime per-record code paths (performance sensitive): (yes / **no**
/ don't know)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: (yes / **no** /
don't know)
- The S3 file system connector: (yes / **no** / don't know)
## Documentation
- Does this pull request introduce a new feature? (yes / **no**)
- If yes, how is the feature documented? (**not applicable** / docs /
JavaDocs / not documented)
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