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https://issues.apache.org/jira/browse/FLINK-8838?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16383525#comment-16383525
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ASF GitHub Bot commented on FLINK-8838:
---------------------------------------
GitHub user lincoln-lil opened a pull request:
https://github.com/apache/flink/pull/5619
[FLINK-8838] [table] Add Support for UNNEST a MultiSet type field.
## What is the purpose of the change
*This PR add support for UNNEST a MultiSet type field according to SQL
standard UNNEST a collection value
(<collection value expression> ::= <array value expression> | <multiset
value expression>)
## Brief change log
- *Add support for UNNEST a MultiSet type field
## Verifying this change
- *See added unit tests.
## 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): yes
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, 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? JavaDocs
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/lincoln-lil/flink FLINK-8838
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/5619.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 #5619
----
commit 961582b28ef20bfab1ea47ceb548b6e6e104e1f7
Author: lincoln-lil <lincoln.86xy@...>
Date: 2018-03-02T12:05:44Z
[FLINK-8838] [table] Add Support for UNNEST a MultiSet type field.
----
> Add Support for UNNEST a MultiSet type field
> --------------------------------------------
>
> Key: FLINK-8838
> URL: https://issues.apache.org/jira/browse/FLINK-8838
> Project: Flink
> Issue Type: New Feature
> Components: Table API & SQL
> Reporter: lincoln.lee
> Assignee: lincoln.lee
> Priority: Major
>
> MultiSetTypeInfo was introduced by FLINK-7491, and UNNEST support Array type
> only, so it would be nice to support UNNEST a MultiSet type field.
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