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https://issues.apache.org/jira/browse/SPARK-59695?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jose Torres reassigned SPARK-59695:
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Assignee: Anish Mahto
> SCD1 Ignore-null support; Introduce version map in `cdc_metadata`
> -----------------------------------------------------------------
>
> Key: SPARK-59695
> URL: https://issues.apache.org/jira/browse/SPARK-59695
> Project: Spark
> Issue Type: Sub-task
> Components: Declarative Pipelines
> Affects Versions: 4.4.0
> Reporter: Anish Mahto
> Assignee: Anish Mahto
> Priority: Major
> Labels: pull-request-available
>
> In order to support ignore-null in SCD1, we need to persist additional
> metadata per key that tells us the last event that authored each key, if any
> so far.
> This is effectively per-leaf level versioning, rather than the typical
> row/key-level versioning that SCD1 uses when ignore-null is off (the default
> case). The latter relies on the single upsert/delete version per row, also in
> the CDC metadata column.
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