gonappuccino opened a new pull request, #26958:
URL: https://github.com/apache/datafusion/pull/26958

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   ## Which issue does this PR close?
   
   - Closes #26949.
   
   ## Rationale for this change
   
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   `lpad`/`rpad` panic or abort when an array length is negative or very large, 
while a scalar length returns `""` or the "too large" error.
   
   ## What changes are included in this PR?
   
   `pad_data_capacity` skips lengths outside `0..=i32::MAX` and caps the total 
at `i32::MAX`. Per-row validation is unchanged.
   
   ## What is the testing strategy for this PR?
   
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   Unit tests in `lpad.rs`/`rpad.rs` and sqllogictest cases in 
`string_literal.slt` cover negative and very large array lengths.
   
   ## Are there any user-facing changes?
   
   No.
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