kosiew opened a new issue, #17763:
URL: https://github.com/apache/datafusion/issues/17763
# 4. Update pruning to handle `CastColumnExpr`
* **Goal:** Preserve statistics-based pruning when predicates include
struct-aware casts.
* **Scope & Location:** `datafusion/physical-optimizer/pruning` and its
tests.
* **Key Tasks:**
* Modify `rewrite_expr_to_prunable` (and related helpers) to unwrap or
appropriately interpret `CastColumnExpr`.
* Ensure predicate evaluation during pruning handles missing
fields/nullable differences correctly.
* Add regression tests covering struct predicates before/after pruning to
confirm behavior is unchanged or improved.
* **Dependencies:** Specs #1–3 should be merged; pruning relies on
expression and serialization support already in place.
* **Out of Scope:** Schema adapter rewrites or broader optimizer refactors.
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