nevzheng opened a new pull request, #12086: URL: https://github.com/apache/gravitino/pull/12086
### What changes were proposed in this pull request? Define and document ClickHouse compatibility for the five Gravitino V3-native type families. | Type family | Outcome | | --- | --- | | Nanosecond timestamps | Round-trip exact precision-9 timestamps, including the UTC timezone-aware representation. | | Variant | Reject because the available JSON-like types do not implement the complete Variant contract. | | Unknown/Null | Reject. | | Geometry | Reject because CRS metadata cannot be recovered faithfully. | | Geography | Reject because CRS and edge-algorithm metadata cannot be recovered faithfully. | ### Why are the changes needed? ClickHouse can represent nanosecond timestamps exactly, but the remaining families would lose type identity or parameters. The connector must distinguish the exact mapping from the lossy ones. Fix: #12070 Related: #12056 Shared JDBC preflight: #12065 Shared JDBC preflight PR: #12081 ### Does this PR introduce _any_ user-facing change? Yes. Precision-9 timestamps gain an exact mapping; unsupported Variant, Unknown, and spatial schemas fail before DDL. ### How was this patch tested? - Added exact timestamp round-trip coverage. - Added converter and custom-operation rejection coverage. - Covered Docker rejected-create and no-table behavior. - Updated `docs/jdbc-clickhouse-catalog.md`. -- 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]
