XiaoHongbo-Hope opened a new pull request, #8045:
URL: https://github.com/apache/paimon/pull/8045
### Purpose
Updating a column covered by a global index via `update_by_arrow_with_row_id`
caused the index to become outdated — subsequent queries through the index
returned stale data instead of the updated values.
This PR adds the `global-index.column-update-action` option and enforces it
during single-machine column updates:
- **THROW_ERROR** (default): raises when the update touches indexed
columns.
- **DROP_PARTITION_INDEX**: drops affected index entries from the manifest.
### Tests
- e2e: THROW_ERROR raises + DROP_PARTITION_INDEX succeeds with index
removed.
- Unit: index manifest write/read roundtrip and combine_deletes cases.
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