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Jack Ye
ddb318567a
## Summary - Complete the SQL reference: `ATTACH DATABASE`, the `CHANGES` clause, and `dedupe()`/`duplicate_pairs()` (verified against current sophon source; these were recently renamed from `vector_dedup`/`vector_duplicate_pairs`). Fix the blob-column default-projection claim and add the previously undocumented `blob_descriptor()`. - Enrich the gated Functions draft (still `.mintignore`'d, pre-release): chained Functions over blob outputs, GPU-produced blobs, Secrets, multi-input/output binding, `code=[module]` packaging. - Upgrade the materialized-view and computed-column auto-refresh drafts with precise, verified catch-up semantics, and add the missing `ALTER MATERIALIZED VIEW` / `CREATE ... WITH(...)` sections (also gated — the automatic-refresh scheduler is still dev/staging-only). - Thread one running example (video frames → GPU extract/caption → dedup → auto-refreshing materialized view) through Functions, materialized views, and the LeRobotDataset integration guide instead of a separate tutorial. - Rename "LanceDB OSS"/"OSS" to "LanceDB Embedded"/"Embedded" throughout (52 files); activate the existing availability-comparison mechanism on `basics/offerings.mdx` for a full feature-by-feature comparison table.
72 lines
3.2 KiB
Plaintext
72 lines
3.2 KiB
Plaintext
---
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title: "Limits"
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sidebarTitle: "Limits"
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description: "Find fixed constraints, configurable bounds and what happens when you reach them."
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icon: ruler
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keywords: ["limits", "maximum", "quota", "constraints", "bounds"]
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---
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<span id="scope" />
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This page lists limits for job events, SQL error reports, sampling and
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full-text indexing. Each table identifies the affected API and what happens
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when a request reaches its limit. SQL and server job limits apply to Enterprise.
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<span id="names" />
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[Naming Rules](/basics/naming) is the reference for name lengths, characters and
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namespace depth. Client and server versions can differ in which rules they
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enforce.
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<span id="jobs" />
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<span id="sql" />
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## Fixed API limits {#fixed-limits}
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| Operation | Scope | Limit and behavior |
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| --- | --- | --- |
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| Job event retrieval | Enterprise | At most 10,000 rows per response. Results can be truncated without a truncation indicator. |
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| `SHOW ERRORS ... LIMIT` | Enterprise SQL | Accepts 1 through 100,000. Values outside the range are rejected. |
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| `SHOW ERRORS` without `FOR JOB` | Enterprise SQL | Inspects up to the 32 most recent failed jobs. Use `FOR JOB` to inspect a specific job. |
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| Percentage sampling | Enterprise SQL | `TABLESAMPLE` accepts percentages from 0 through 100. Values outside the range are rejected. |
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| Row-count sampling | Enterprise SQL | `TABLESAMPLE (... ROWS)` requires a whole number. |
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See [SQL job commands](/sql/ddl/job#errors) and
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[Sampling](/sql/dql/sampling) for syntax and restrictions on supported table types.
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<span id="schema" />
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Data-type and index constraints belong to the operation you choose. Check
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[Data types](/sql/data-types) and [Vector indexes](/indexing/vector-index)
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before choosing a schema or index. For materialized views, confirm your
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source table meets your deployment's requirements with your administrator
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before creating one over it.
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## Configurable limits {#not-quotas}
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| Setting | What it controls |
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| --- | --- |
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| Job event `limit` | Requests more or fewer event rows. The default is 1,000; the 10,000-row maximum still applies. |
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| FTS `max_token_length` | The maximum indexed token length. The default is 40; longer tokens are excluded from the index. |
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| Enterprise capacity and quotas | Storage, request rate and concurrency are governed by your deployment's resources and configuration. Confirm these with your administrator or LanceDB support. |
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## Handling rejected or incomplete results {#behavior}
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- **Rejected requests:** correct the input before retrying, such as a sampling
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percentage outside the accepted range.
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- **Truncated responses:** do not assume that a returned event list is the full
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history. Increasing `limit` cannot exceed the maximum; use filters to narrow
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the events you inspect.
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- **Excluded data:** an FTS token-length setting can affect which words are
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searchable. Choose it for your text and indexing requirements.
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<span id="availability" />
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## Learn more {#next}
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- [Naming Rules](/basics/naming): choose portable names and paths.
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- [Jobs](/basics/jobs): track work and inspect events.
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- [Full-text indexes](/indexing/fts-index): configure tokenization.
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- [SQL](/basics/sql) and [SDKs](/basics/sdk): check interface support.
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- [Enterprise support](/deployment/support): discuss deployment capacity.
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