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https://issues.apache.org/jira/browse/IMPALA-11565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17602075#comment-17602075
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Baike Xia commented on IMPALA-11565:
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Patch available for review: [https://gerrit.cloudera.org/c/18953/]
> For KUDU tables, alter table add column operation is optimized
> ---------------------------------------------------------------
>
> Key: IMPALA-11565
> URL: https://issues.apache.org/jira/browse/IMPALA-11565
> Project: IMPALA
> Issue Type: New Feature
> Reporter: Baike Xia
> Assignee: Baike Xia
> Priority: Major
> Fix For: Impala 4.2.0
>
>
> For kudu table, *add/replace if not exists column* operation , if the columns
> already exist and are of the same type, no operation is performed; If the
> type is different, an error is reported.
>
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