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https://issues.apache.org/jira/browse/FLINK-3118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15043304#comment-15043304
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Chesnay Schepler commented on FLINK-3118:
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that would mean skipping the input validation for all functions that implement
ResultTypeQueryable.
Now i don't know anything about the Graph API, but why can't you get the input
type from the input datasets?
> Check if MessageFunction implements ResultTypeQueryable
> -------------------------------------------------------
>
> Key: FLINK-3118
> URL: https://issues.apache.org/jira/browse/FLINK-3118
> Project: Flink
> Issue Type: Bug
> Components: Gelly
> Reporter: Martin Junghanns
> Assignee: Martin Junghanns
>
> To generalize message values in vertex centric computations, it is necessary
> to let the user define the {{TypeInformation}} via {{ResultTypeQueryable}}.
> This needs to be checked in {{VertexCentricIteration}}.
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