Implement expression transform that handles CDF columns

[OussamaSaoudi-db]

Please describe why this is necessary.

Predicates are used to filter rows in Snapshot and in TableChanges for change data feed. Currently, predicates are simply passed to the engine if one is specified. However, predicates may reference columns that do not exist in the data the engine is reading. For example, Generated Columns, and Change Data Feed Generated Columns.

While CDF predicates may be used to filter actions during log replay as an optimization, these columns must be dropped in any predicate applied to physical data.

Describe the functionality you are proposing.

Implement a way to transform logical predicates to physical ones. The physical predicate used by the engine that reference columns in the data. The transformed predicate must not be more selective than the original one.

Additional context

No response