chakkk309 opened a new pull request, #22338:
URL: https://github.com/apache/datafusion/pull/22338
## Which issue does this PR close?
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- Closes #22223.
## Rationale for this change
`lead` / `lag` normalize offsets internally by negating values in some
cases. When the offset is `i64::MIN`, negating it overflows because `i64::MIN`
cannot be represented as a positive `i64`.
This can trigger an overflow panic instead of returning a proper DataFusion
error.
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## What changes are included in this PR?
This PR rejects `i64::MIN` offsets for `lead` / `lag` before they can be
negated.
It adds checked offset negation logic and returns an execution error like:
```text
lag offset must not be i64::MIN
```
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## Are these changes tested?
Yes
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## Are there any user-facing changes?
Yes
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