[jira] [Commented] (FLINK-28434) Extend "NestedProjectionUtil" to unify support for projection pushdown for physical fields or metadata only

["lincoln lee (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-28434?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17563534#comment-17563534 ] 

lincoln lee commented on FLINK-28434:
-------------------------------------

cc [~fsk119] would you like to look at this issue when you have time later? 

> Extend "NestedProjectionUtil" to unify support for projection pushdown for physical fields or metadata only
> -----------------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-28434
>                 URL: https://issues.apache.org/jira/browse/FLINK-28434
>             Project: Flink
>          Issue Type: Improvement
>            Reporter: lincoln lee
>            Priority: Minor
>
> Extend `NestedProjectionUtil` to unify support for projection pushdown for physical fields or metadata only. 
> Currently, the `NestedProjectionUtil` relies on rewritten of the input row type, this not works on the case that a table source only [SupportsReadingMetadata|https://github.com/apache/flink/pull/20118#] and not [SupportsProjectionPushDown (which was fixed by |https://github.com/apache/flink/pull/20118#] [FLINK-28334|https://github.com/apache/flink/pull/20118#] [)|https://github.com/apache/flink/pull/20118#]
> Some refactor work is needed.



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