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https://issues.apache.org/jira/browse/HUDI-3304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17629911#comment-17629911
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Jian Feng commented on HUDI-3304:
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[~shenshengli] I mean you can update data to null by specifying multiple
ordering fields since it can distinguish which part is newer.
> Support partial update payload
> ------------------------------
>
> Key: HUDI-3304
> URL: https://issues.apache.org/jira/browse/HUDI-3304
> Project: Apache Hudi
> Issue Type: New Feature
> Components: writer-core
> Reporter: Jian Feng
> Assignee: Jian Feng
> Priority: Critical
> Labels: pull-request-available
> Fix For: 0.13.0
>
> Attachments: image2022-1-13_0-33-5.png
>
>
> h2. current status
> * OverwriteNonDefaultsWithLatestAvroPayload implement partial update
> behavior in combineAndGetUpdateValue method
> * Spark sql also have a 'Merge into' syntax support partial update by
> ExpressionPayload,
> * both OverwriteNonDefaultsWithLatestAvroPayload and ExpressionPayload can
> not handle partial update in preCombine method, so they can only support
> partial update with COW table
> h2. solution
> make preCombine function also support partial update(need pass schema as
> parameter)
> !image2022-1-13_0-33-5.png|width=832,height=516!
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