vignesh-manel opened a new pull request, #194:
URL: https://github.com/apache/polaris-tools/pull/194
Adds the functionality to update Iceberg table using Edit Schema option in
table details page.
Features:
- Edit, add, and remove fields on an existing table's schema from the UI
- Preserves existing field IDs to maintain schema compatibility
- Preserves identifier-field-ids (used for row-level operations/upserts)
across schema updates
- Optimistic concurrency via assert-current-schema-id — concurrent schema
changes are detected and surfaced as an error
- Warning banner shown when fields are removed, indicating existing data
in those columns will become inaccessible
Known Limitations / Future Work:
- Json Schema Editor has not been added
- Nested struct fields inside list element types are not covered by the
removed-field count warning
- Type changing on existing fields is allowed in the UI but may be
rejected by the Iceberg catalog depending on compatibility rules — no
pre-validation is performed client-side
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