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https://issues.apache.org/jira/browse/FLINK-10170?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16585166#comment-16585166
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ASF GitHub Bot commented on FLINK-10170:
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tragicjun opened a new pull request #6578: [FLINK-10170 [table] Support string
representation for map types in d…
URL: https://github.com/apache/flink/pull/6578
## What is the purpose of the change
Since 1.6 the recommended way of creating source/sink table is using
connector/format/schema/ descriptors. However, when declaring map types in the
schema descriptor, the following exception would be thrown:
> org.apache.flink.table.api.TableException: A string representation for map
types is not supported yet.
This pull request is to add string representation support for map types.
## Brief change log
- Add new `Keyword` and `PackratParser` for map types in TypeStringUtils
- Add normalization logic for map types in `TypeStringUtils.writeTypeInfo()`
- Update relevant unit tests in `TypeStringUtilsTest` and
`TableDescriptorTest`
## Verifying this change
This change can be verified covered by updated unit tests, such as
*TypeStringUtilsTest* and *TableDescriptorTest*.
## 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)
- 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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> Support string representation for map types in descriptor-based Table API
> -------------------------------------------------------------------------
>
> Key: FLINK-10170
> URL: https://issues.apache.org/jira/browse/FLINK-10170
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Affects Versions: 1.6.1, 1.7.0
> Reporter: Jun Zhang
> Assignee: Jun Zhang
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.6.0
>
> Attachments: flink-10170
>
>
> Since 1.6 the recommended way of creating source/sink table is using
> connector/format/schema/ descriptors. However, when declaring map types in
> the schema descriptor, the following exception would be thrown:
> {quote}org.apache.flink.table.api.TableException: A string representation for
> map types is not supported yet.{quote}
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