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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-947) Add support for "Named Datasets"
Date Mon, 16 Feb 2015 14:36:11 GMT

    [ https://issues.apache.org/jira/browse/FLINK-947?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14322816#comment-14322816
] 

ASF GitHub Bot commented on FLINK-947:
--------------------------------------

GitHub user aljoscha opened a pull request:

    https://github.com/apache/flink/pull/405

    [FLINK-947] Add a declarative expression API

    This one is quite big. So you should check out the documentation, skaldic, examples and
test cases to see how the API works.

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

    $ git pull https://github.com/aljoscha/flink linq

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

    https://github.com/apache/flink/pull/405.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 #405
    
----
commit 147525ced43db6690a64fbae1395dbd258b8901d
Author: Aljoscha Krettek <aljoscha.krettek@gmail.com>
Date:   2014-10-03T16:25:15Z

    Change translateToDataflow to return Operator
    
    Before, translateToDataflow of SingleInputOperator could only return
    a single input operator of the lower layer, same for TwoInputOperator.
    
    This change allows translateToDataflow to return more kinds of
    operators.

commit 58b5b9ec6e65855bfd71287deb6352dfc4498451
Author: Aljoscha Krettek <aljoscha.krettek@gmail.com>
Date:   2014-10-23T16:09:38Z

    Add methods to CompositeType for querying field types and names

commit ac29ee3ad36a72d7c41549f38da1a00e66d85041
Author: Aljoscha Krettek <aljoscha.krettek@gmail.com>
Date:   2014-10-01T11:12:18Z

    [FLINK-947] Add a declarative expression API

----


> Add support for "Named Datasets"
> --------------------------------
>
>                 Key: FLINK-947
>                 URL: https://issues.apache.org/jira/browse/FLINK-947
>             Project: Flink
>          Issue Type: New Feature
>          Components: Java API
>            Reporter: Aljoscha Krettek
>            Assignee: Aljoscha Krettek
>            Priority: Minor
>
> This would create an API that is a mix between SQL like declarativity and the power of
user defined functions. Example user code could look like this:
> {code:Java}
> NamedDataSet one = ...
> NamedDataSet two = ...
> NamedDataSet result = one.join(two).where("key").equalTo("otherKey")
>   .project("a", "b", "c")
>   .map( (UserTypeIn in) -> return new UserTypeOut(...) )
>   .print();
> {code}



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