u70b3 opened a new pull request, #4090:
URL: https://github.com/apache/doris-website/pull/4090
Document the `SHOW INDEX` support for Lance Filesystem Catalog tables added
in apache/doris#66637.
## What Changed
- `lakehouse/catalogs/lance-catalog.mdx` (EN + zh-CN)
- Feature Overview: metadata access now lists `SHOW INDEX` (Filesystem
Catalogs only); added a `System tables (table$...)` row marked "Not supported"
that points users to `SHOW INDEX` for index metadata, aligning with the
Paimon/Iceberg system-table model.
- New "Inspect Lance Indexes / 查看 Lance 索引" section: syntax and aliases
(`SHOW INDEXES` / `SHOW KEY` / `SHOW KEYS`), the 13-column result mapping for
Lance tables (only `Table`, `Key_name`, `Seq_in_index`, `Column_name`,
`Index_type`, and `Properties` carry values), nested-field paths with backtick
quoting, the `Properties` details allowlist, output examples taken from the
code PR's regression test, fail-closed semantics, the `SHOW` privilege
requirement, and the fixed `SHOW INDEX is not supported for Lance REST
catalogs` error.
- Current Limitations and Recommendations: added a `SHOW INDEX` bullet.
- `sql-manual/sql-statements/table-and-view/index/SHOW-INDEX.md` (EN + zh-CN)
- Description now covers Lance logical indexes, and notes that tables in
other external catalogs (Iceberg, Paimon, ...) return an empty result, with
links to their system-table docs (including Paimon `table_indexes`).
- Added a Lance example.
`docs/` (dev) is intentionally untouched: the Lance catalog doc was removed
from dev in #4086 because apache/doris master has no Lance code (the feature
lives on branch-4.1).
## Version Note for Reviewers
The page states "Lance Catalog is supported starting from Apache Doris 4.2",
but the code shipped on the 4.1.4 line: the Lance catalog appears in
`4.1.4-rc01` (2026-08-18) and `SHOW INDEX` appears in `4.1.4-rc02`
(2026-08-25); `4.1.3` contains neither. The new content deliberately adds no
version marker of its own and inherits the page-level note. Please confirm
whether the page note should be corrected to 4.1.4.
## Versions
- [ ] dev
- [x] 4.x
- [ ] 3.x
- [ ] 2.1 or older (not covered by version/language sync gate)
## Languages
- [x] Chinese
- [x] English
## Docs Checklist
- [x] Checked by AI
- [ ] Test Cases Built
- [x] Updated required version and language counterparts, or explained why
not
- [ ] If only one language changed, confirmed whether source/translation
counterparts need sync
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