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https://issues.apache.org/jira/browse/FLINK-22318?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17329230#comment-17329230
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todd commented on FLINK-22318:
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I think it should be done in two steps, the first step is to extend the SQL
syntax, and the second step is to modify Schema#UnresolvedColumn#columnName.
The current columnName is of final type, I need to remove the flinal keyword
and add the setColumnName method at the same time.
> Support RENAME column name for ALTER TABLE statement
> ----------------------------------------------------
>
> Key: FLINK-22318
> URL: https://issues.apache.org/jira/browse/FLINK-22318
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / API
> Reporter: Jark Wu
> Priority: Major
>
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