Anish Mahto created SPARK-57264:
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             Summary: AutoCDC Flow Execution; Support SCD2 in `AutoCdcMergeFlow`
                 Key: SPARK-57264
                 URL: https://issues.apache.org/jira/browse/SPARK-57264
             Project: Spark
          Issue Type: Sub-task
          Components: Declarative Pipelines
    Affects Versions: 4.3.0
            Reporter: Anish Mahto


Today, `AutoCdcMergeFlow` throws a feature not supported exception if the 
provided `
storedAsScdType` specifies SCD2.
 
Implement support for SCD2 in `AutoCdcMergeFlow`, by implementing the `schema` 
and `load` implementations for SCD2, as well as implementing SCD2 specific 
schema-level validations.



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