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https://issues.apache.org/jira/browse/HUDI-5272?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HUDI-5272:
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Labels: pull-request-available (was: )
> Align with Flink to support no_precombine in spark
> --------------------------------------------------
>
> Key: HUDI-5272
> URL: https://issues.apache.org/jira/browse/HUDI-5272
> Project: Apache Hudi
> Issue Type: Improvement
> Reporter: kazdy
> Assignee: kazdy
> Priority: Major
> Labels: pull-request-available
>
> Flink supports {{public static final String NO_PRE_COMBINE =
> "no_precombine";}} (although not documented) for inserts and updates.
> This was Introduced by [#3874|https://github.com/apache/hudi/pull/3874].
> https://issues.apache.org/jira/browse/HUDI-2633
> {{When the precombine field is not specified, we use the proctime semantics,
> that means, the records come later are more fresh}}
> There's argument against it, because for updates records cannot be
> deduplicated properly. But at the same time Hudi allows us to use non-strict
> insert mode that breaks PK uniqueness.
> Users can make informed decision and handle duplicates on their own or bring
> in their own precombine logic with window functions etc before triggering
> hudi write.
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