Anish Mahto created SPARK-59208:
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Summary: SCD2 Ignore-null support; Introduce ignore-null selection
in `ChangeArgs`
Key: SPARK-59208
URL: https://issues.apache.org/jira/browse/SPARK-59208
Project: Spark
Issue Type: Sub-task
Components: Declarative Pipelines
Affects Versions: 4.4.0
Reporter: Anish Mahto
`ChangeArgs` holds all of the user-specified configurations (arguments) that
should apply to their AutoCDC flow by execution time.
Ignore-null is a new AutoCDC argument that allows users to specify a set of
columns that AutoCDC should treat as unauthored by an event when they receive a
null-value in that event.
We need to represent this selection in `ChangeArgs` so that AutoCDC batch
processors can later reference it, and validate that the columns selected
indeed exist and are eligible for selection. Ex. a key column or reserved
AutoCDC column may never be specified as ignore-null.
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