QuakeWang opened a new pull request, #8366:
URL: https://github.com/apache/paimon/pull/8366
### Purpose
Fix partition filter handling in vector search builders.
Previously, `withFilter` extracted partition predicates but still kept the
full predicate in the scalar filter. For partition-only filters, indexed vector
reads could incorrectly enter the scalar pre-filter path and return empty
results when no scalar index files existed. In addition, explicit
`withPartitionFilter` calls and partition predicates extracted from
`withFilter` could overwrite each other instead of behaving as a stable
intersection.
### Tests
- `mvn -pl paimon-core -Dtest=VectorSearchBuilderTest test`
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