twalthr opened a new pull request #13413:
URL: https://github.com/apache/flink/pull/13413
## What is the purpose of the change
Example for aggregating and ranking data using Flink SQL on updating (but
bounded) streams.
This PR depends on #13291.
## Brief change log
The example shows how to declare a table using SQL DDL for reading
insert-only data and handling
updating data. It should give a first impression about Flink SQL as a
changelog processor. The example
uses some streaming operations that produce a stream of updates. See the
other examples for pure CDC
processing and more complex operations.
## Verifying this change
This change added tests and can be verified as follows:
`UpdatingTopCityExample`
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): yes
- 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/Mesos, ZooKeeper: no
- The S3 file system connector: no
## Documentation
- Does this pull request introduce a new feature? no
- If yes, how is the feature documented? not applicable
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