p-eye opened a new pull request, #28498:
URL: https://github.com/apache/flink/pull/28498
## What is the purpose of the change
This pull request implements metadata reading support for the
`debezium-avro-confluent` format, bringing feature parity with the
`debezium-json` format. Users can now access Debezium metadata fields (such as
source database, schema, table, and timestamps) when using Avro-encoded
Debezium messages from Kafka.
## Brief change log
- Add `DebeziumAvroDecodingFormat` implementing `ProjectableDecodingFormat`
with metadata support
- Implement 6 metadata fields (`ingestion-timestamp`, `source.timestamp`,
`source.databases`, `source.schema`, `schema name`, `source.table`,
`source.properties`)
- Add metadata deserialization tests
- Update documentation with Avro format examples
## Verifying this change
This change added tests and can be verified as follows:
- Added `DebeziumAvroSerDeSchemaTest.testDeserializationWithMetadata()` that
validates all 6 metadata fields (ingestion-timestamp, source.timestamp,
source.database, source.schema, source.table, source.properties) are correctly
extracted from Debezium Avro CDC messages.
- Update `DebeziumAvroFormatFactoryTest.testSeDeSchema()` and
`testSeDeSchemaWithSchemaOption()` to verify the factory creates
deserialization schemas with correct metadata support parameters
- Existing tests (`testDeleteDataDeserialization()`,
`testSeDeSchemaWithInvalidSchemaOption()`) pass without modification, ensuring
backward compatibility
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): no
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: no
- The serializers: no
- The runtime per-record code paths (performance sensitive): yes (adds
metadata extraction in deser path, but only when metadata columns are
explicitly requested)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
- The S3 file system connector: no
## Documentation
- Does this pull request introduce a new feature? yes
- If yes, how is the feature documented? docs
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