[PR] fix(file_index): skip pruning for narrowing integer schema changes [paimon-rust]

["QuakeWang (via GitHub)" <gi...@apache.org>]

QuakeWang opened a new pull request, #806:
URL: https://github.com/apache/paimon-rust/pull/806

   ### Purpose
   
   Follow-up to #783. FileIndex predicate remapping checked literal conversion but allowed narrowing integer schema changes. An old INT value such as 383 becomes NULL when read as TINYINT, so pushing IS NULL into the old index can incorrectly discard matching rows.
   
   ### Brief change log
   
   - Reject index predicate remapping for narrowing integer changes, matching Java's fallback rule.
   - Preserve safe integer widening and add regression tests for predicate composition and index-enabled/disabled result equivalence.
   
   ### Tests
   
   - `cargo fmt --all -- --check`
   - `cargo clippy --locked --all-targets --workspace --features fulltext,vortex -- -D warnings`
   - `cargo test --locked -p paimon --all-targets --features fulltext,vortex`
   
   ### API and Format
   
   No changes.
   
   ### Documentation
   
   No changes needed.
   


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Re: [PR] fix(file_index): skip pruning for narrowing integer schema changes [paimon-rust]

["JingsongLi (via GitHub)" <gi...@apache.org>]

JingsongLi merged PR #806:
URL: https://github.com/apache/paimon-rust/pull/806


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