Gabriel39 opened a new pull request, #66628:
URL: https://github.com/apache/doris/pull/66628
### What problem does this PR solve?
Issue Number: None
Related PR: None
Problem Summary: Several negative connector queries expose generic plugin or
filesystem implementation details instead of stable connector-facing errors.
Equivalent failures can also produce different messages during metadata
binding, system-table resolution, and scan planning. Use the connector display
name for system-table constraint errors, report a normal table-not-found error
when a remotely resolved handle disappears, and normalize Iceberg metadata-file
misses across all table-loading entry points by inspecting the complete
exception cause chain.
### Release note
Paimon and Iceberg negative queries now return stable connector-facing
errors for unsupported system-table scans, missing redirected tables, and
missing Iceberg metadata files.
### Check List (For Author)
- Test
- [ ] Regression test
- [x] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason
- Behavior changed:
- [ ] No.
- [x] Yes. Connector errors no longer expose generic plugin or
filesystem wrapper details in these paths.
- Does this need documentation?
- [x] No.
- [ ] Yes.
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label
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