[FLINK-19098] Make RowData CSV and JSON converters public

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.11.0
• Fix Version/s: 1.12.0
• Component/s: Formats (JSON, Avro, Parquet, ORC, SequenceFile), Table SQL / Ecosystem
• Labels: pull-request-available
• Assignee: Brian Zhou
• Reporter: Brian Zhou
• Created: 31/Aug/20 07:36
• Updated: 19/Feb/21 07:28
• Resolved: 25/Sep/20 14:50

Description

Some of the Rowdata converters(SeDer between Rowdata and format objects like GenericRecord/JsonNode) are private or package-private (like Json), this is not easy for other third-party connector projects to utilize to implement its own format factory in Table API.

For example, Pravega connector is now developing a schema-registry-based format factory. The Pravega schema registry is a rest service similar with confluent registry , but it can help to serialize/deserialize json/avro/protobuf/custom format data. It will help a lot if these converters are public.

Noticed in FLINK-16048, we have already moved the avro converters out and made them public. Similarly, it should be safe to make at least json and csv format converters public.

Issue Links

• links to: GitHub Pull Request #13303