> 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-publication-rel.md).

# 52.42. pg\_publication\_rel \#

The catalog `pg_publication_rel` contains the mapping between relations and publications in the database. This is a many-to-many mapping. See also [Section 53.18](/internals/views/view-pg-publication-tables.md) for a more user-friendly view of this information.

**Table 52.42. `pg_publication_rel` Columns**

| <p>Column Type</p><p>Description</p>                                                                                                                                                                                                                                                                                                                                                                                            |
| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| <p><code>oid</code> <code>oid</code></p><p>Row identifier</p>                                                                                                                                                                                                                                                                                                                                                                   |
| <p><code>prpubid</code> <code>oid</code> (references <a href="/pages/03QqSG0zWBs4uxmar9x8"><code>pg\_publication</code></a>.<code>oid</code>)</p><p>Reference to publication</p>                                                                                                                                                                                                                                                |
| <p><code>prrelid</code> <code>oid</code> (references <a href="/pages/b1fii6hWVNacZFXaxWON"><code>pg\_class</code></a>.<code>oid</code>)</p><p>Reference to relation</p>                                                                                                                                                                                                                                                         |
| <p><code>prqual</code> <code>pg\_node\_tree</code></p><p>Expression tree (in <code>nodeToString()</code> representation) for the relation's publication qualifying condition. Null if there is no publication qualifying condition.</p>                                                                                                                                                                                         |
| <p><code>prattrs</code> <code>int2vector</code> (references <a href="/pages/VopJygmvPNyHGB2zfl0Z"><code>pg\_attribute</code></a>.<code>attnum</code>)</p><p>This is an array of values that indicates which table columns are part of the publication. For example, a value of <code>1 3</code> would mean that the first and the third table columns are published. A null value indicates that all columns are published.</p> |

<br>

***

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


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