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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-1776) APIs provide invalid Semantic Properties for Operators with SelectorFunction keys
Date Thu, 02 Apr 2015 19:00:54 GMT

    [ https://issues.apache.org/jira/browse/FLINK-1776?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14393169#comment-14393169
] 

ASF GitHub Bot commented on FLINK-1776:
---------------------------------------

Github user fhueske commented on the pull request:

    https://github.com/apache/flink/pull/532#issuecomment-89010020
  
    Will rebase and merge this in about 24h unless somebody raises a flag.


> APIs provide invalid Semantic Properties for Operators with SelectorFunction keys
> ---------------------------------------------------------------------------------
>
>                 Key: FLINK-1776
>                 URL: https://issues.apache.org/jira/browse/FLINK-1776
>             Project: Flink
>          Issue Type: Bug
>          Components: Java API, Scala API
>    Affects Versions: 0.9
>            Reporter: Fabian Hueske
>            Assignee: Fabian Hueske
>            Priority: Critical
>             Fix For: 0.9
>
>
> Semantic properties are defined by users and evaluated by the optimizer.
> When semantic properties such as forwarded or read fields are bound to the input type
of a function.
> In case of operators with selector function keys, a user function is wrapped by a wrapping
function that has a different input types than the original user function. However, the user-defined
semantic properties are verbatim forwarded to the optimizer. 
> Since the properties refer to a specific type which is changed by the wrapping function
and the semantic properties are not adapted, the optimizer uses wrong properties and might
produce invalid plans



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