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Brendan Clement
06aa526ae1
This PR is part of the documentation revamp. Once the full set of PRs is merged, we’ll publish the combined site to staging for review before updating docs.lancedb.com. The curation, SQL and operations pages contain outdated claims and examples that do not reliably work as written. This corrects those pages against the reviewed SDK and local server evidence, including prepared statements, background jobs, cleanup and monitoring. Integration guides are grouped with their examples in #4533. Function and Secret-object documentation stays unpublished until its release. The two Function pages are listed in `.mintignore` and left out of the navigation, and the sections about them on other pages are MDX comments. Stacked on #4533. Each MDX file has one PR owner. Rebase onto main after #4533 is squash-merged. Local assembly, Mint validation and link checks pass, and the assembled site shows no Function or Secret-object content. A local release rehearsal that uncomments the drafts and restores the navigation also passes. Hold publication until this PR and lancedb/sophon#8688 are on `main`.
60 lines
2.0 KiB
Plaintext
60 lines
2.0 KiB
Plaintext
---
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title: "Index"
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sidebarTitle: "Index"
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description: "CREATE INDEX and DROP INDEX — one column, with the algorithm chosen by USING."
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icon: bolt
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keywords: ["create index", "drop index", "sql"]
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---
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<Badge color="red">Enterprise</Badge> [SQL runs in LanceDB Enterprise.](/sql)
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## CREATE INDEX {#create}
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```sql
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CREATE INDEX ON documents USING btree (title)
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CREATE INDEX text_search ON documents USING fts (text)
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```
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`USING` is required: it names the algorithm. The scalar algorithms are `btree`,
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`bitmap` and `label_list`; `fts` builds a full-text index; and the vector
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algorithms are `ivf_pq`, `ivf_rq`, `ivf_flat`, `ivf_hnsw_sq` and `ivf_hnsw_pq`,
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where the deployment supports them. Index options go in a `WITH (...)` clause.
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<Note>
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In LanceDB Enterprise, SQL `CREATE INDEX` covers **one column**. A name between
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`INDEX` and `ON` names the index, where the deployment's configuration allows
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it; without one, the server names it after the column, as in `title_idx`. For a
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multi-column index, use the SDK's [`create_index`](/indexing).
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</Note>
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<Note>
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**Enterprise job type:** `reindex_` followed by the algorithm, such as
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`reindex_btree` or `reindex_ivf_pq`; the name says which algorithm is building,
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not a different feature. An SDK build that must not replace an existing index
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runs as `create_` followed by the algorithm instead. See
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[Build & Repair](/indexing/reindexing).
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</Note>
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## DROP INDEX {#drop}
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```sql
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DROP INDEX documents.title_idx
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```
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Takes the qualified `table.index` name. Find it with the SDK's
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[`list_indices`](/indexing) if you created the index without
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naming it yourself. A deployment builds the index in the background after
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`CREATE INDEX` returns; until that build finishes, the index is not listed and
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`DROP INDEX` reports it as not found.
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## What to read next {#next}
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<CardGroup cols={2}>
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<Card title="Indexing" icon="bolt" href="/indexing">
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Choosing an index type from the SDK.
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</Card>
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<Card title="Build & Repair" icon="refresh" href="/indexing/reindexing">
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Keeping an index current as data arrives.
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</Card>
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</CardGroup>
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