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https://issues.apache.org/jira/browse/FLINK-36093?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Leonard Xu reassigned FLINK-36093:
----------------------------------

    Assignee: MOBIN

> PreTransform operator wrongly filters out columns when multiple transform 
> rules were defined
> --------------------------------------------------------------------------------------------
>
>                 Key: FLINK-36093
>                 URL: https://issues.apache.org/jira/browse/FLINK-36093
>             Project: Flink
>          Issue Type: Improvement
>          Components: Flink CDC
>            Reporter: yux
>            Assignee: MOBIN
>            Priority: Major
>
> Currently, such transform rule could not work:
> ```yaml
> transform:
>   - projection: 'A' as result
>     filter: tag >= 0
>   - projection: score as result
>     filter: tag < 0
> ```
> Here, `score` column will be filtered out in PreTransform stage, since it 
> wasn't referenced in the first transform rule. As a result, the following 
> transform rule will fail since `score` does not exist in PostTransform 
> operator.



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