> 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/15/internals/system-catalogs/pg_conversion.md).

# 53.14. pg\_conversion

## 53.14. pg\_conversion

The catalog `pg_conversion` describes encoding conversion functions. See [CREATE CONVERSION](/15/reference/sql-commands/create-conversion.md) for more information.

**Table 53.14. `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="/15/internals/system-catalogs/pg_namespace.md"><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="/15/internals/system-catalogs/pg_authid.md"><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="/15/the-sql-language/functions-and-operators/system-information-functions.md#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="/15/the-sql-language/functions-and-operators/system-information-functions.md#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="/15/internals/system-catalogs/pg_proc.md"><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>                                                                                                                                                                                           |

***

原文：[PostgreSQL 15.19 Documentation](/15/internals/system-catalogs/pg_conversion.md)（英文原文，待翻譯）


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