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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-4294) Allow access of composite type fields
Date Mon, 01 Aug 2016 12:21:20 GMT

    [ https://issues.apache.org/jira/browse/FLINK-4294?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15401935#comment-15401935

ASF GitHub Bot commented on FLINK-4294:

GitHub user twalthr opened a pull request:


    [FLINK-4294] [table] Allow access of composite type fields

    Thanks for contributing to Apache Flink. Before you open your pull request, please take
the following check list into consideration.
    If your changes take all of the items into account, feel free to open your pull request.
For more information and/or questions please refer to the [How To Contribute guide](http://flink.apache.org/how-to-contribute.html).
    In addition to going through the list, please provide a meaningful description of your
    - [x] General
      - The pull request references the related JIRA issue ("[FLINK-XXX] Jira title text")
      - The pull request addresses only one issue
      - Each commit in the PR has a meaningful commit message (including the JIRA id)
    - [ ] Documentation
      - Documentation has been added for new functionality
      - Old documentation affected by the pull request has been updated
      - JavaDoc for public methods has been added
    - [x] Tests & Build
      - Functionality added by the pull request is covered by tests
      - `mvn clean verify` has been executed successfully locally or a Travis build has passed
    This PR implements composite types for the Table API & SQL. Fields of Flink's composite
types such as Tuples, POJO, etc. can be accessed from within expressions/SQL (see also CompositeAccessTest
for examples). This PR is not mergable at the moment as Calcite does not allow for selecting
entire composite types. I will write on the Calcite ML for this.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/twalthr/flink FLINK-4294

Alternatively you can review and apply these changes as the patch at:


To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #2319
commit 9ffc30416cb0873381b0b0bf484119bdd4459bdd
Author: twalthr <twalthr@apache.org>
Date:   2016-08-01T12:15:49Z

    [FLINK-4294] [table] Allow access of composite type fields


> Allow access of composite type fields
> -------------------------------------
>                 Key: FLINK-4294
>                 URL: https://issues.apache.org/jira/browse/FLINK-4294
>             Project: Flink
>          Issue Type: New Feature
>          Components: Table API & SQL
>            Reporter: Timo Walther
>            Assignee: Timo Walther
> Currently all Flink CompositeTypes are treated as GenericRelDataTypes. It would be better
to access individual fields of composite types, too. e.g.
> {code}
> SELECT composite.name FROM composites
> SELECT tuple.f0 FROM tuples
> 'f0.getField(0)
> {code}

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