[jira] [Commented] (FLINK-31240) Reduce the overhead of conversion between DataStream and Table

["Dong Lin (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-31240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17705739#comment-17705739 ] 

Dong Lin commented on FLINK-31240:
----------------------------------

[~yunfengzhou] Can you explain the impact of this performance optimizing in the JIRA description?

> Reduce the overhead of conversion between DataStream and Table
> --------------------------------------------------------------
>
>                 Key: FLINK-31240
>                 URL: https://issues.apache.org/jira/browse/FLINK-31240
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table SQL / API
>            Reporter: Jiang Xin
>            Assignee: Yunfeng Zhou
>            Priority: Major
>              Labels: pull-request-available
>
> In some cases, users may need to convert the underlying DataStream to Table and then convert it back to DataStream(e.g. some Flink ML libraries accept a Table as input and convert it to DataStream for calculation.). This would cause unnecessary overhead because of data conversion between the internal data type and the external data type.
> We can reduce the overhead by checking if there are paired `fromDataStream`/`toDataStream` function call without any transformation, if so using the source datastream directly.
>  



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