mirror of
https://github.com/lancedb/lancedb.git
synced 2026-10-13 23:32:27 +00:00
Brendan Clement
e20664740f
The two Function pages declare `launch: functions`, and every other page marks what it says about Functions, so the assembled site leaves them out until the launch. Before it, the pages that offered Functions for Python work point Enterprise readers at Geneva instead. The SQL Function example now uses Arrow type names, which the server requires, and states the 3.12 default for `python_version`.
54 lines
1.6 KiB
Plaintext
54 lines
1.6 KiB
Plaintext
---
|
|
title: "Namespace"
|
|
sidebarTitle: "Namespace"
|
|
description: "CREATE SCHEMA and DROP SCHEMA — the SQL spelling of namespace DDL."
|
|
icon: folder-tree
|
|
keywords: ["namespace", "schema", "create schema", "drop schema", "sql"]
|
|
---
|
|
|
|
<Badge color="red">Enterprise</Badge> [SQL runs on a deployment.](/sql)
|
|
|
|
A [namespace](/management/namespace) is addressed in SQL as a `SCHEMA` -- the
|
|
standard's name for the same concept.
|
|
|
|
## CREATE SCHEMA {#create}
|
|
|
|
```sql
|
|
CREATE SCHEMA public
|
|
CREATE SCHEMA db1.ns1.ns2
|
|
CREATE SCHEMA IF NOT EXISTS `ns1$ns2`
|
|
```
|
|
|
|
A dotted path creates the whole chain: `db1.ns1.ns2` creates `ns2` inside
|
|
`ns1` inside `db1`, provided the parents already exist. A name containing the
|
|
namespace path delimiter itself is backtick-quoted, as in `` `ns1$ns2` `` above.
|
|
|
|
`IF NOT EXISTS` makes the statement a no-op rather than an error when the
|
|
namespace is already there.
|
|
|
|
## DROP SCHEMA {#drop}
|
|
|
|
```sql
|
|
DROP SCHEMA db1.public
|
|
DROP SCHEMA IF EXISTS `a$b`
|
|
DROP SCHEMA `a$b` RESTRICT
|
|
```
|
|
|
|
<Warning>
|
|
`CASCADE` is rejected: **"DROP SCHEMA CASCADE is not supported; drop the
|
|
objects inside first."** A namespace's tables, views and other objects must be
|
|
dropped explicitly before the namespace itself can go. `RESTRICT` -- the
|
|
default -- states that requirement rather than changing it.
|
|
</Warning>
|
|
|
|
## What to read next {#next}
|
|
|
|
<CardGroup cols={2}>
|
|
<Card title="Namespace" icon="folder-tree" href="/management/namespace">
|
|
The SDK equivalent, and how a namespace fits the catalog hierarchy.
|
|
</Card>
|
|
<Card title="Table" icon="table" href="/sql/ddl/table">
|
|
Creating tables inside a namespace.
|
|
</Card>
|
|
</CardGroup>
|