JingsongLi opened a new pull request, #834: URL: https://github.com/apache/paimon-rust/pull/834
### Purpose Preserve local-timezone semantics when reading PyPaimon schemas containing `TIMESTAMP_LTZ(p)`. Rust currently rejects that spelling in `LocalZonedTimestampType` and then accepts it as an ordinary `TimestampType` because both share the `TIMESTAMP` prefix. In a non-UTC process, native planning consequently computes the wrong partition directory and can select a stale table-level deletion vector. For example, with `partition.legacy-name=false` and `TZ=Asia/Shanghai`, an LTZ instant at `2026-09-15 20:00:00 UTC` belongs under `2026-09-16 04:00:00.000`, but the mistaken type keeps `2026-09-15 20:00:00.000`. This was reproduced while fixing LTZ paths in apache/paimon#9825. ### Brief change log - Recognize `TIMESTAMP_LTZ(p)` as `LocalZonedTimestampType`, preserving precision and nullability. - Reject LTZ spellings in the ordinary timestamp parser so they cannot silently lose timezone semantics. - Keep serialization in Java's canonical `TIMESTAMP(p) WITH LOCAL TIME ZONE` form. ### Tests - Type tests: 15 passed. The new regression covers precisions 0/3/6/9, nullable and non-nullable fields, both LTZ spellings, canonical serialization, and ordinary timestamp behavior. It failed before the fix. - Partition utilities: 32 tests passed. - Python binding writes: 21 passed, including two new cases that reload PyPaimon's schema alias, write actual partitioned files, inspect directory names, plan, and read through SQL. Both new cases failed with the old wheel. - With a rebuilt wheel and the corresponding Python path fix, 299 related PyPaimon tests passed, including isolated UTC/Asia-Shanghai LTZ cases for Python and native planning, repeated deletes, and historical reads. - Rust fmt/clippy, Python Flake8, and `git diff --check` passed. ### API and Format No public API or binary encoding changes. LTZ aliases now retain their intended timezone semantics instead of being interpreted as ordinary timestamps. Canonical serialized type names are unchanged. Files previously written using the mistaken type's partition directory are not automatically moved. ### Documentation Added a parser comment explaining PyPaimon's LTZ schema spelling. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
