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https://issues.apache.org/jira/browse/FLINK-7683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16179116#comment-16179116
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ASF GitHub Bot commented on FLINK-7683:
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GitHub user pnowojski opened a pull request:
https://github.com/apache/flink/pull/4722
[FLINK-7683] Iterate over keys in KeyedStateBackend
## What is the purpose of the change
This is required to make possible preserving backward compatibility while
changing state definition of a keyed state operator.
## Verifying this change
This change added new unit tests to cover new feature.
## 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
## Documentation
- Does this pull request introduce a new feature? yes
- If yes, how is the feature documented? JavaDocs
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/pnowojski/flink keys
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/4722.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #4722
----
commit ac41b26cdb5c2341bb25e520c4d449ec4e956a8f
Author: Piotr Nowojski <[email protected]>
Date: 2017-09-14T10:39:30Z
[FLINK-7683] Iterate over keys in KeyedStateBackend
----
> Add method to iterate over all of the existing keys in a statebackend
> ---------------------------------------------------------------------
>
> Key: FLINK-7683
> URL: https://issues.apache.org/jira/browse/FLINK-7683
> Project: Flink
> Issue Type: New Feature
> Components: State Backends, Checkpointing
> Reporter: Piotr Nowojski
> Assignee: Piotr Nowojski
>
> This is required to make possible preserving backward compatibility while
> changing state definition of a keyed state operator.
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