lincoln-lil opened a new pull request #17939:
URL: https://github.com/apache/flink/pull/17939
## What is the purpose of the change
In order to minimize the distributed disorder problem when writing data into
table with primary keys that many users suffers. We introduce
'table.exec.sink.pk-shuffle' option, by default it will auto add a shuffle by
default when the sink's parallelism differs from upstream operator and upstream
is append only.
This works only when the upstream ensures the multi-records' order on the
primary key, if not, the added shuffle can not solve the problem (In this
situation, a more proper way is to consider the deduplicate operation for the
source firstly or use an upsert source with primary key definition which truly
reflect the records evolution.
## Brief change log
add new option 'table.exec.sink.pk-shuffle' and related test cases.
## Verifying this change
Streaming sql's `RankTest`, `AggregateTest` and `JoinTest`
## 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, Kubernetes/Yarn, ZooKeeper: (no)
- The S3 file system connector: (no)
## Documentation
- Does this pull request introduce a new feature? (yes)
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