[PR] [rust] Parallelize OR global-index planning across files [paimon-rust]

["XiaoHongbo-Hope (via GitHub)" <gi...@apache.org>]

XiaoHongbo-Hope opened a new pull request, #1011:
URL: https://github.com/apache/paimon-rust/pull/1011

   ## Summary
   - Evaluate OR branches concurrently within the existing scan-level limit, then process their results in predicate order.
   - Serialize BTree queries for the same resolved file path to reuse the reader without consuming permits while waiting on that file.
   - Preserve row-range merging, index coverage, fallback, and residual-filter semantics.
   
   ## Validation
   - `cargo test --locked -p paimon --lib global_index_scanner::tests` — 62 passed, 1 existing ignored.
   - `cargo clippy --locked -p paimon --lib --tests -- -D warnings` — passed.
   - `cargo fmt --all --check` and `git diff --check` — passed.
   
   No customer-workload A/B was run for this patch. Earlier prototype measurements are not claimed as results of this PR.


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Re: [PR] [rust] Parallelize OR global-index planning across files [paimon-rust]

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

JingsongLi merged PR #1011:
URL: https://github.com/apache/paimon-rust/pull/1011


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