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https://issues.apache.org/jira/browse/SPARK-57322?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-57322:
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Labels: pull-request-available (was: )
> Implement SCD2 Batch Processor; Reconcile StartAt/EndAt
> -------------------------------------------------------
>
> Key: SPARK-57322
> URL: https://issues.apache.org/jira/browse/SPARK-57322
> Project: Spark
> Issue Type: Sub-task
> Components: Declarative Pipelines
> Affects Versions: 4.3.0
> Reporter: Anish Mahto
> Priority: Major
> Labels: pull-request-available
>
> {*}Preamble{*}:
> The SCD type 2 flow is a foreachBatch streaming query on an input
> change-data-feed, and is responsible for reconciling the incoming change data
> onto some target table that follows SCD2 replication semantics.
> SCD2 flows also maintain an "auxiliary" table to keep track of early-arriving
> out-of-order received events state. Each microbatch will need to reconcile
> against this auxiliary table as well, and update the auxiliary table's state
> appropriately for future microbatches.
> *Reconcile StartAt/EndAt*
> Once we have all of the relevant rows for microbatch SCD2 reconciliation
> decomposed, we can begin setting the start/end-at for incoming microbatch
> rows, and rewriting existing start/end-at of existing rows in the aux/target
> tables to account for late arriving events.
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