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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2020/02/27 10:32:23 UTC

[GitHub] [flink] wuchong opened a new pull request #11236: [FLINK-16269][FLINK-16108][table-planner-blink] Fix schema of query and sink do not match when generic or POJO type is requested

wuchong opened a new pull request #11236: [FLINK-16269][FLINK-16108][table-planner-blink] Fix schema of query and sink do not match when generic or POJO type is requested
URL: https://github.com/apache/flink/pull/11236

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## What is the purpose of the change

Fix schema of query and sink do not match when generic or POJO type is requested, e.g. `table.toAppendStream[MyPojo]`.

## Brief change log

1. Generic type
- Currently, we create a `LEGACY('RAW', ...)` type for generic type, however, after optimization, the type will be `RAW('MyPojo', ..)`. Then the type is mistach.
- We should convert generic type info into `RAW(...)` at the begining.
2. POJO type
- Currently, we infer sink schema from the PojoTypeInfo. However, the fields order may be mismatch with the query schema fields.
- We should generate sink schema using the types from PojoTypeInfo, but field order from query schema.

## Verifying this change

This change added a test which transforms a nested data type.

## 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, 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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