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https://issues.apache.org/jira/browse/SPARK-50573?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jungtaek Lim reassigned SPARK-50573:
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Assignee: Eric Marnadi
> Adding State Schema ID to State Rows to schema evolution
> --------------------------------------------------------
>
> Key: SPARK-50573
> URL: https://issues.apache.org/jira/browse/SPARK-50573
> Project: Spark
> Issue Type: New Feature
> Components: Structured Streaming
> Affects Versions: 4.0.0
> Reporter: Eric Marnadi
> Assignee: Eric Marnadi
> Priority: Major
> Labels: pull-request-available
>
> In order to support schema evolution without a full rewrite, we are
> prepending each state row with a state schema ID, which we will use in
> subsequent changes to look up the schema that a row was written with. This
> change adds the encoding and decoding of this prefix through the
> StateRowPrefixEncoder.
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