QuakeWang opened a new pull request, #9310:
URL: https://github.com/apache/paimon/pull/9310
### Purpose
`PredicateConverter` passed `BETWEEN` bounds directly as Flink expression
objects instead of converting them to typed Paimon literal values. This could
produce predicates with incompatible bound types, especially when implicit type
conversion or null bounds were involved.
Convert both bounds using the referenced field type before building the
predicate.
### Tests
- Added coverage for implicit numeric conversion, inclusive boundaries,
null input, and null bounds.
- Passed `PredicateConverterTest` with both Flink 1 and Flink 2 profiles.
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