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Jack Ye
734eb39dc3
Six groups were verbs -- Manage, Ingest, Train, Operate, Secure, Deploy -- and now name the thing rather than the action. Four more were sentence case. The page labels that were verb phrases follow: Add Computed Column becomes Computed Columns, Refresh Column becomes Column Refresh, Configuring Storage becomes Configuration, and Explain becomes Query Plans, which is also more accurate now that the page covers analyze as well. SQL statement pages take the keyword -- SELECT, DDL, DML, REFRESH, SHOW, EXPLAIN -- because a statement name is a noun and lowercase Select and Show read as instructions. Concept pages there keep noun phrases: Joins, Window Functions, Subqueries, Operators. Two duplicate labels are resolved on the way. Reranking sat in Semantic Search labelled Overview despite being the only page on its subject, and the Enterprise client page sat in SQL Reference labelled SQL next to the reference Overview; it is Client Connection now. Title case leaves prepositions and articles lowercase, so Needle in a Haystack and Hybrid Search on BEIR are already correct and unchanged.
90 lines
2.5 KiB
Plaintext
90 lines
2.5 KiB
Plaintext
---
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title: "SHOW"
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sidebarTitle: "SHOW"
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description: "Listing jobs, functions, materialized views, and the errors a job produced."
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icon: list
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keywords: ["show jobs", "show functions", "show materialized views", "show errors", "show tables"]
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---
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<Badge color="red">Enterprise</Badge> [SQL runs on a deployment.](/sql)
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Introspection over objects DataFusion has no concept of. All four are LanceDB
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extensions.
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<Warning>
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DataFusion's own `SHOW TABLES`, `SHOW COLUMNS` and `SHOW <variable>` are **not
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available**. They are implemented over `information_schema`, which this session
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does not enable, so they fail with
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`"... is not supported unless information_schema is enabled"`.
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List tables with the SDKs -- `table_names()` / `tableNames()`. For a table's
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columns, use [`DESCRIBE`](/sql/explain#describe).
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</Warning>
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## SHOW MATERIALIZED VIEWS {#materialized-views}
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```sql
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SHOW MATERIALIZED VIEWS
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```
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<Note>
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Cheaper than the SDK equivalent. `list_materialized_views` finds views by
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reading every table's schema, costing one open per table; this asks the server.
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</Note>
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## SHOW FUNCTIONS {#functions}
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```sql
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SHOW FUNCTIONS
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```
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Lists registered [functions](/management/function) and their versions. Since a
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version is immutable and a column pins the version that fills it, this is how
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you find which versions are still in use before dropping one.
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## SHOW JOBS {#jobs}
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```sql
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SHOW JOBS
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```
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Every job the server knows about — id, type, state, creation time. The SQL
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counterpart of `list_jobs`; see [Query and job](/basics/jobs).
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## SHOW ERRORS {#errors}
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```sql
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SHOW ERRORS ON <table> [FOR JOB '<job-id>'] [LIMIT <n>]
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```
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```sql
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SHOW ERRORS ON documents
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SHOW ERRORS ON documents FOR JOB 'job-abc' LIMIT 100
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```
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Why rows failed. This is the statement to reach for when a
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[refresh](/sql/refresh) reports fewer filled rows than you expected.
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**Errors and limits**
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| --- | --- |
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| `LIMIT` | must be between 1 and 100,000 |
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| Failed jobs scanned without `FOR JOB` | 32 most recent |
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| Tables the server does not open directly | not supported |
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Without `FOR JOB` this surveys recent failures and stops at 32 jobs. When the
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listing stops at your `LIMIT`, the message says so — narrow with `FOR JOB`
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rather than raising the limit blindly.
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## See also {#see-also}
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<CardGroup cols={2}>
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<Card title="Management" icon="folder-tree" href="/management">
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The SDK listing calls, per object.
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</Card>
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<Card title="Query and job" icon="hourglass-half" href="/basics/jobs">
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What a job handle exposes beyond these listings.
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</Card>
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</CardGroup>
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