> 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-conversion.md).

# 52.14. pg\_conversion \#

The catalog `pg_conversion` describes encoding conversion functions. See [CREATE CONVERSION](/reference/sql-commands/sql-createconversion.md) for more information.

**Table 52.14. `pg_conversion` Columns**

| <p>Column Type</p><p>Description</p>                                                                                                                                                                                                   |
| -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| <p><code>oid</code> <code>oid</code></p><p>Row identifier</p>                                                                                                                                                                          |
| <p><code>conname</code> <code>name</code></p><p>Conversion name (unique within a namespace)</p>                                                                                                                                        |
| <p><code>connamespace</code> <code>oid</code> (references <a href="/pages/p7uH9oRd2ZTbQCzy1qKB"><code>pg\_namespace</code></a>.<code>oid</code>)</p><p>The OID of the namespace that contains this conversion</p>                      |
| <p><code>conowner</code> <code>oid</code> (references <a href="/pages/nyEMOe5gQKgypFQTDbjS"><code>pg\_authid</code></a>.<code>oid</code>)</p><p>Owner of the conversion</p>                                                            |
| <p><code>conforencoding</code> <code>int4</code></p><p>Source encoding ID (<a href="/pages/c8lw51k5xRREjrdY9Xxk#PG-ENCODING-TO-CHAR"><code>pg\_encoding\_to\_char()</code></a> can translate this number to the encoding name)</p>     |
| <p><code>contoencoding</code> <code>int4</code></p><p>Destination encoding ID (<a href="/pages/c8lw51k5xRREjrdY9Xxk#PG-ENCODING-TO-CHAR"><code>pg\_encoding\_to\_char()</code></a> can translate this number to the encoding name)</p> |
| <p><code>conproc</code> <code>regproc</code> (references <a href="/pages/8TiLY9QeJalZY0OBAANF"><code>pg\_proc</code></a>.<code>oid</code>)</p><p>Conversion function</p>                                                               |
| <p><code>condefault</code> <code>bool</code></p><p>True if this is the default conversion</p>                                                                                                                                          |

<br>

***

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


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