> For the complete documentation index, see [llms.txt](https://docs.postgresql.tw/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.postgresql.tw/internals/catalogs/catalog-pg-user-mapping.md).

# 52.65. pg\_user\_mapping \#

The catalog `pg_user_mapping` stores the mappings from local user to remote. Access to this catalog is restricted from normal users, use the view [`pg_user_mappings`](/internals/views/view-pg-user-mappings.md) instead.

**Table 52.66. `pg_user_mapping` Columns**

| <p>Column Type</p><p>Description</p>                                                                                                                                                                                        |
| --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| <p><code>oid</code> <code>oid</code></p><p>Row identifier</p>                                                                                                                                                               |
| <p><code>umuser</code> <code>oid</code> (references <a href="/pages/nyEMOe5gQKgypFQTDbjS"><code>pg\_authid</code></a>.<code>oid</code>)</p><p>OID of the local role being mapped, or zero if the user mapping is public</p> |
| <p><code>umserver</code> <code>oid</code> (references <a href="/pages/W21N7u6kIuMD53Tleqty"><code>pg\_foreign\_server</code></a>.<code>oid</code>)</p><p>The OID of the foreign server that contains this mapping</p>       |
| <p><code>umoptions</code> <code>text\[]</code></p><p>User mapping specific options, as “keyword=value” strings</p>                                                                                                          |

<br>

***

原文：[PostgreSQL 18.6 Documentation](https://www.postgresql.org/docs/18/catalog-pg-user-mapping.html)（英文原文，待翻譯）


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