fix: downcast to FixedSizeBinaryArray in CASE literal lookup table (#26096)
Sole Author: Patrick Ribbsaeter (@patrickswedish) · Immutable Commit SHA: c52eb9734b4c968ad9880fb82f3214efd88cd82b
Physical expression evaluator fix resolving runtime downcast panics when evaluating SQL CASE literal lookup tables over Arrow FixedSizeBinaryArray columns.
PR #26096
Merged Mainline
c52eb97
Immutable Git SHA
Rust
Systems
48/48 CI Green
CI & Test Matrix
01 · Engineering problem
The failure mode
Evaluating CASE WHEN expressions mixing FixedSizeBinary columns and scalar binary literals failed physical expression coercion or panicked when literal byte lengths differed.
02 · Technical response
What changed
- 01Updated CASE expression type coercion and literal adaptation for FixedSizeBinary operands.
- 02Added comprehensive sqllogictest and unit regression coverage for matching and mismatched binary literal widths.
03 · Verified outcome
Evidence-backed result
- ✓Restored deterministic FixedSizeBinary CASE expression evaluation across DataFusion.
- ✓Merged upstream from commit c52eb9734b4c968ad9880fb82f3214efd88cd82b.
04 · Cryptographic Git record
Immutable source evidence
Independent open-source engineering authored solely by Patrick Ribbsaeter (@patrickswedish). Company and project names identify the public repository context only under nominative fair use. No employment, client, vendor, or partnership relationship is implied unless explicitly stated.