raminqaf opened a new pull request, #28166:
URL: https://github.com/apache/flink/pull/28166
## What is the purpose of the change
CDC streams often deliver events out of order. The PTF ORDER BY clause
introduced in FLINK-39256 aligns naturally with FROM_CHANGELOG: partitioning by
the primary key and ordering by event time reorders out-of-order CDC events per
key before the operations are applied.
Adds a new "Ordering CDC events with ORDER BY" subsection to the
FROM_CHANGELOG documentation with the SQL example and the requirements
(watermarked time attribute, ASC on the first order column, set semantics via
PARTITION BY). Extends the Table API examples with the equivalent
partitionBy(...).orderBy(...).fromChangelog() pattern.
Adds a corresponding example in the PartitionedTable#fromChangelog Javadoc.
Adds a cross-reference from the PTF ORDER BY guide to FROM_CHANGELOG so
users discover the pattern from either side.
## 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? (no)
- If yes, how is the feature documented? (docs / JavaDocs)
---
##### Was generative AI tooling used to co-author this PR?
<!--
If generative AI tooling has been used in the process of authoring this PR,
please
change the checkbox below to `[X]` followed by the name of the tool, and
uncomment the
"Generated-by" line. See the ASF Generative Tooling Guidance for details:
https://www.apache.org/legal/generative-tooling.html
You are responsible for the quality and correctness of every change in this
PR
regardless of the tooling used. Low-effort AI-generated PRs will be closed.
See
AGENTS.md for the full guidance.
-->
- [X] Yes (please specify the tool below)
Generated-by: Opus 4.7
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
