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https://issues.apache.org/jira/browse/SPARK-34255?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-34255:
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Assignee: Apache Spark
> DataSource V2: support static partitioning on required distribution and
> ordering
> --------------------------------------------------------------------------------
>
> Key: SPARK-34255
> URL: https://issues.apache.org/jira/browse/SPARK-34255
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Jungtaek Lim
> Assignee: Apache Spark
> Priority: Major
>
> SPARK-34026 addressed the functionality of requiring repartition and sort
> order from data source, but left the number of partitions during repartition
> as depending on the config (default number of shuffle partitions).
> Some special data sources may require the "static number of partitions"
> during repartition - for example, state data source. Spark stores the state
> via partitioned by "hash(group key) % default number of shuffle partitions",
> which means state data source should do the same to rewrite the state data.
> And the data source is required to "change" the default number of shuffle
> partitions, as the value is not guaranteed to be same, and also there's a
> chance we change the number of partitions to non-static one (like letting AQE
> decides it, SPARK-34230).
> This issue tracks the effort to support static number of partitions during
> repartition.
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