choksi2212 commented on PR #26482:
URL: https://github.com/apache/datafusion/pull/26482#issuecomment-6250649615

   Hi! This is my first PR to DataFusion, so the workflow runs need a 
maintainer approval to start. Happy to wait, but flagging it here in case it 
slipped through.
   
   For reviewers, everything was verified locally on top of 61c3472:
   
   - `cargo test -p datafusion-functions-aggregate --lib bit_xor`: 4/4, 
including the three new accumulator tests
   - New `bit_xor_sliding_window.slt` (modeled on 
`array_agg_sliding_window.slt`): runs green end to end
   - Negative control: with only the `evaluate` guard reverted, exactly the two 
all-NULL-frame tests fail with `UInt64(0)` vs `UInt64(NULL)`, which is the 
issue symptom; the regression pins keep passing
   - `rustfmt --check` and `cargo clippy -p datafusion-functions-aggregate 
--all-targets` clean
   
   The legitimate-zero case (a frame holding two equal values XORs to 0 and 
must stay 0) is pinned in the sqllogictest file, so the NULL guard can't be 
over-applied.
   


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