QuakeWang opened a new pull request, #454:
URL: https://github.com/apache/paimon-rust/pull/454
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### Purpose
<!-- Linking this pull request to the issue -->
Rust already has BTree global index read support, scan integration, and
row-id coverage semantics, but it did not have an entry point to build BTree
global index files. This left the Rust read path unable to close the write/read
lifecycle by itself.
<!-- What is the purpose of the change -->
### Brief change log
<!-- Please describe the changes made in this pull request and explain how
they address the issue -->
- Add a single-column BTree global index builder for data-evolution
row-tracking append tables.
- Plan index shards by contiguous global row-id ranges and reject missing
`first_row_id`.
- Write BTree index files under `{table}/index/` with Java-compatible
BTree/index manifest metadata.
- Add `Table::new_btree_global_index_build_builder()`.
- Add `CALL sys.create_global_index(..., index_type => 'btree')` with
unsupported handling for non-BTree types.
- Add tests for shard planning, row-id gaps, missing row ids, overlap
rejection, manifest metadata, SQL creation, and fast/full/detail scan behavior
after appends.
### Tests
<!-- List unit tests or integration cases to verify this change -->
- `cargo fmt --all -- --check`
- `cargo clippy --all-targets --workspace --features
fulltext,vortex,mosaic -- -D warnings`
- `cargo test -p paimon btree`
- `cargo test -p paimon table::global_index_scanner::tests --lib`
- `cargo test -p paimon table::table_commit::tests::test_global_index
--lib`
- `cargo test -p paimon-datafusion --test procedures`
### API and Format
<!-- Does this change affect API or storage format -->
Adds a minimal Rust API and SQL procedure for BTree global index creation.
The generated files use Java-compatible BTree/index manifest formats.
### Documentation
<!-- Does this change introduce a new feature or require documentation
updates -->
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