## 51.32. `pg_namespace`

The catalog `pg_namespace` stores namespaces. A namespace is the structure underlying SQL schemas: each namespace can have a separate collection of relations, types, etc. without name conflicts.

Table 51.32. `pg_namespace` Columns

Name | Type | References | Description
--- | --- | --- | ---
`oid` | `oid` |  | Row identifier (hidden attribute; must be explicitly selected)
`nspname` | `name` |  | Name of the namespace
`nspowner` | `oid` | ``pg_authid`.oid` | Owner of the namespace
`nspacl` | `aclitem[]` |  | Access privileges; see GRANT and REVOKE for details