kevinjqliu opened a new issue, #3496:
URL: https://github.com/apache/iceberg-python/issues/3496
`ResidualVisitor.visit_not_starts_with` appears to always return
`AlwaysFalse()` for partitioned residuals because it applies Python `not` to
the `AlwaysTrue()` / `AlwaysFalse()` object returned by `visit_starts_with`.
Example with an identity partition:
```text
partition value: x_part = "bb"
filter: NotStartsWith("x", "a")
actual residual: AlwaysFalse()
expected residual: AlwaysTrue()
```
This can attach an incorrect residual to planned scan tasks.
Relevant code: `pyiceberg/expressions/visitors.py`
`ResidualVisitor.visit_not_starts_with`.
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