[Flink 7003] [Table API & SQL] use PEEK_FIELDS_NO_EXPAND for CompositeRelDataType

[suez1224]

What is the purpose of the change

This pull request change CompositeRelDataType to use the newly added StructKind PEEK_FIELDS_NO_EXPAND to disable the flattening behavior when select star.

Brief change log

• Change CompositeRelDataType to use StructKind.PEEK_FIELDS_NO_EXPAND.
• added unittests for both stream/batch table/SQL APIs.

Verifying this change

This change added unittests for both stream/batch table/SQL APIs to verify the behavior.

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): NO
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: NO
• The S3 file system connector: NO

Documentation

No

[fhueske]

Thanks for the PR @suez1224.
I will merge it.

Thanks, Fabian

[twalthr]

Maybe we can reduce the number of ITCases in this PR and add tests to CompositeAccessTest instead.

[fhueske]

Yes, I noticed that as well. I tried to add a test to CompositeAccessTest but this doesn't not work with the test base class, because the optimizer removes the Calc node which results in a ClassCastException.

Instead I merged some of the ITCases.