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https://issues.apache.org/jira/browse/KUDU-2587?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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xiaokai.wang reassigned KUDU-2587:
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Assignee: xiaokai.wang
> Conditional updating the column value
> -------------------------------------
>
> Key: KUDU-2587
> URL: https://issues.apache.org/jira/browse/KUDU-2587
> Project: Kudu
> Issue Type: New Feature
> Components: tablet
> Reporter: xiaokai.wang
> Assignee: xiaokai.wang
> Priority: Minor
> Labels: features
>
> If wanting to keep max/min value in kudu, before updating data you should
> check the data in kudu, deciding whether to update the data through
> comparing. All this you should call kudu twice when needing to update data.
> Increasing a attribute of 'UpdatingType' to 'ColumnSchema' can only call kudu
> one time. Before using, you should set the column updating type:
> max/min/overwrite. After that, you can just update data the way before. When
> scanning, you can get the data of max/min(delta file applying based on the
> column attribute). When compacting, base data will be max/min if setting
> column max/min.
> Also supporting force over wring way when you want to force updating(when
> column setting max/min).
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