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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>52.22. pg_extension</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="catalog-pg-event-trigger.html" title="52.21. pg_event_trigger" /><link rel="next" href="catalog-pg-foreign-data-wrapper.html" title="52.23. pg_foreign_data_wrapper" /></head><body><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">52.22. <code xmlns="http://www.w3.org/1999/xhtml" class="structname">pg_extension</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="catalog-pg-event-trigger.html" title="52.21. pg_event_trigger">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="catalogs.html" title="Chapter 52. System Catalogs">Up</a></td><th width="60%" align="center">Chapter 52. System Catalogs</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 11.5 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="catalog-pg-foreign-data-wrapper.html" title="52.23. pg_foreign_data_wrapper">Next</a></td></tr></table><hr></hr></div><div class="sect1" id="CATALOG-PG-EXTENSION"><div class="titlepage"><div><div><h2 class="title" style="clear: both">52.22. <code class="structname">pg_extension</code></h2></div></div></div><a id="id-1.10.4.24.2" class="indexterm"></a><p>
The catalog <code class="structname">pg_extension</code> stores information
about the installed extensions. See <a class="xref" href="extend-extensions.html" title="38.16. Packaging Related Objects into an Extension">Section 38.16</a>
for details about extensions.
</p><div class="table" id="id-1.10.4.24.4"><p class="title"><strong>Table 52.22. <code class="structname">pg_extension</code> Columns</strong></p><div class="table-contents"><table class="table" summary="pg_extension Columns" border="1"><colgroup><col /><col /><col /><col /></colgroup><thead><tr><th>Name</th><th>Type</th><th>References</th><th>Description</th></tr></thead><tbody><tr><td><code class="structfield">oid</code></td><td><code class="type">oid</code></td><td> </td><td>Row identifier (hidden attribute; must be explicitly selected)</td></tr><tr><td><code class="structfield">extname</code></td><td><code class="type">name</code></td><td> </td><td>Name of the extension</td></tr><tr><td><code class="structfield">extowner</code></td><td><code class="type">oid</code></td><td><code class="literal"><a class="link" href="catalog-pg-authid.html" title="52.8. pg_authid"><code class="structname">pg_authid</code></a>.oid</code></td><td>Owner of the extension</td></tr><tr><td><code class="structfield">extnamespace</code></td><td><code class="type">oid</code></td><td><code class="literal"><a class="link" href="catalog-pg-namespace.html" title="52.32. pg_namespace"><code class="structname">pg_namespace</code></a>.oid</code></td><td>Schema containing the extension's exported objects</td></tr><tr><td><code class="structfield">extrelocatable</code></td><td><code class="type">bool</code></td><td> </td><td>True if extension can be relocated to another schema</td></tr><tr><td><code class="structfield">extversion</code></td><td><code class="type">text</code></td><td> </td><td>Version name for the extension</td></tr><tr><td><code class="structfield">extconfig</code></td><td><code class="type">oid[]</code></td><td><code class="literal"><a class="link" href="catalog-pg-class.html" title="52.11. pg_class"><code class="structname">pg_class</code></a>.oid</code></td><td>Array of <code class="type">regclass</code> OIDs for the extension's configuration
table(s), or <code class="literal">NULL</code> if none</td></tr><tr><td><code class="structfield">extcondition</code></td><td><code class="type">text[]</code></td><td> </td><td>Array of <code class="literal">WHERE</code>-clause filter conditions for the
extension's configuration table(s), or <code class="literal">NULL</code> if none</td></tr></tbody></table></div></div><br class="table-break" /><p>
Note that unlike most catalogs with a <span class="quote">“<span class="quote">namespace</span>”</span> column,
<code class="structfield">extnamespace</code> is not meant to imply
that the extension belongs to that schema. Extension names are never
schema-qualified. Rather, <code class="structfield">extnamespace</code>
indicates the schema that contains most or all of the extension's
objects. If <code class="structfield">extrelocatable</code> is true, then
this schema must in fact contain all schema-qualifiable objects
belonging to the extension.
</p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="catalog-pg-event-trigger.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="catalogs.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="catalog-pg-foreign-data-wrapper.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">52.21. <code class="structname">pg_event_trigger</code> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> 52.23. <code class="structname">pg_foreign_data_wrapper</code></td></tr></table></div></body></html>
