Add information_schema, duckdb_* introspection functions, pragma_* functions,
and relative path traversal patterns to the SQL blocklist so users cannot
enumerate schema metadata regardless of RBAC. Add six corresponding tests.
Replace substring matching with word-boundary regex in query endpoint's
table access validation. Prevents false positives where short table names
like 'id' would block any query containing the word. Uses re.escape() to
safely handle special characters in table names.
- Import re module at top
- Use regex pattern with word boundaries (\b) for matching
- Add tests to verify no false positives and proper blocking
Expand blocked keywords to cover parquet_scan, read_csv_auto, query_table,
iceberg_scan, delta_scan, call, URL schemes (http/https/s3/gcs), and
additional file-scan functions. Set enable_external_access=false on the
non-read-only analytics connection path. Add three new tests covering
parquet_scan, read_csv_auto, and query_table blocking.
Schema v3: add is_public column to table_registry (default true).
src/rbac.py: can_access_table() checks admin bypass, public flag,
explicit permissions, wildcard bucket permissions.
API enforcement:
- manifest: filters tables by user access
- download: 403 if no access
- catalog: filters table list
- query: validates referenced tables against allowed list
New admin permissions API (/api/admin/permissions) for grant/revoke.
28 access control tests + 733 total tests passing.
