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https://issues.apache.org/jira/browse/FLINK-24700?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17436814#comment-17436814
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Timo Walther commented on FLINK-24700:
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I will wait with improving the docs until FLINK-24717 is fixed.
> Clarify semantics of filter, projection, partition, and metadata pushdown
> -------------------------------------------------------------------------
>
> Key: FLINK-24700
> URL: https://issues.apache.org/jira/browse/FLINK-24700
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / API
> Reporter: Timo Walther
> Assignee: Timo Walther
> Priority: Major
>
> FLINK-19903 has revealed a couple of shortcomings that occur when
> implementing multiple ability interfaces. We should improve the documentation
> and better define the semantics.
> - Push produced type not only for metadata pushdown but also projection push
> down.
> - Clarify order of filter + projection
> - Clarify order of projection/filter + partition
> - Simplify handling of partition columns
> ...
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