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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>53.34. pg_operator</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-opclass.html" title="53.33. pg_opclass" /><link rel="next" href="catalog-pg-opfamily.html" title="53.35. pg_opfamily" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">53.34. <code class="structname">pg_operator</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="catalog-pg-opclass.html" title="53.33. pg_opclass">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="catalogs.html" title="Chapter 53. System Catalogs">Up</a></td><th width="60%" align="center">Chapter 53. System Catalogs</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.7 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="catalog-pg-opfamily.html" title="53.35. pg_opfamily">Next</a></td></tr></table><hr /></div><div class="sect1" id="CATALOG-PG-OPERATOR"><div class="titlepage"><div><div><h2 class="title" style="clear: both">53.34. <code class="structname">pg_operator</code></h2></div></div></div><a id="id-1.10.4.36.2" class="indexterm"></a><p>
The catalog <code class="structname">pg_operator</code> stores information about operators.
See <a class="xref" href="sql-createoperator.html" title="CREATE OPERATOR"><span class="refentrytitle">CREATE OPERATOR</span></a>
and <a class="xref" href="xoper.html" title="38.14. User-Defined Operators">Section 38.14</a> for more information.
</p><div class="table" id="id-1.10.4.36.4"><p class="title"><strong>Table 53.34. <code class="structname">pg_operator</code> Columns</strong></p><div class="table-contents"><table class="table" summary="pg_operator Columns" border="1"><colgroup><col /></colgroup><thead><tr><th class="catalog_table_entry"><p class="column_definition">
Column Type
</p>
<p>
Description
</p></th></tr></thead><tbody><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">oid</code> <code class="type">oid</code>
</p>
<p>
Row identifier
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">oprname</code> <code class="type">name</code>
</p>
<p>
Name of the operator
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">oprnamespace</code> <code class="type">oid</code>
(references <a class="link" href="catalog-pg-namespace.html" title="53.32. pg_namespace"><code class="structname">pg_namespace</code></a>.<code class="structfield">oid</code>)
</p>
<p>
The OID of the namespace that contains this operator
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">oprowner</code> <code class="type">oid</code>
(references <a class="link" href="catalog-pg-authid.html" title="53.8. pg_authid"><code class="structname">pg_authid</code></a>.<code class="structfield">oid</code>)
</p>
<p>
Owner of the operator
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">oprkind</code> <code class="type">char</code>
</p>
<p>
<code class="literal">b</code> = infix operator (<span class="quote">“<span class="quote">both</span>”</span>),
or <code class="literal">l</code> = prefix operator (<span class="quote">“<span class="quote">left</span>”</span>)
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">oprcanmerge</code> <code class="type">bool</code>
</p>
<p>
This operator supports merge joins
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">oprcanhash</code> <code class="type">bool</code>
</p>
<p>
This operator supports hash joins
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">oprleft</code> <code class="type">oid</code>
(references <a class="link" href="catalog-pg-type.html" title="53.64. pg_type"><code class="structname">pg_type</code></a>.<code class="structfield">oid</code>)
</p>
<p>
Type of the left operand (zero for a prefix operator)
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">oprright</code> <code class="type">oid</code>
(references <a class="link" href="catalog-pg-type.html" title="53.64. pg_type"><code class="structname">pg_type</code></a>.<code class="structfield">oid</code>)
</p>
<p>
Type of the right operand
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">oprresult</code> <code class="type">oid</code>
(references <a class="link" href="catalog-pg-type.html" title="53.64. pg_type"><code class="structname">pg_type</code></a>.<code class="structfield">oid</code>)
</p>
<p>
Type of the result
(zero for a not-yet-defined <span class="quote">“<span class="quote">shell</span>”</span> operator)
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">oprcom</code> <code class="type">oid</code>
(references <a class="link" href="catalog-pg-operator.html" title="53.34. pg_operator"><code class="structname">pg_operator</code></a>.<code class="structfield">oid</code>)
</p>
<p>
Commutator of this operator (zero if none)
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">oprnegate</code> <code class="type">oid</code>
(references <a class="link" href="catalog-pg-operator.html" title="53.34. pg_operator"><code class="structname">pg_operator</code></a>.<code class="structfield">oid</code>)
</p>
<p>
Negator of this operator (zero if none)
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">oprcode</code> <code class="type">regproc</code>
(references <a class="link" href="catalog-pg-proc.html" title="53.39. pg_proc"><code class="structname">pg_proc</code></a>.<code class="structfield">oid</code>)
</p>
<p>
Function that implements this operator
(zero for a not-yet-defined <span class="quote">“<span class="quote">shell</span>”</span> operator)
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">oprrest</code> <code class="type">regproc</code>
(references <a class="link" href="catalog-pg-proc.html" title="53.39. pg_proc"><code class="structname">pg_proc</code></a>.<code class="structfield">oid</code>)
</p>
<p>
Restriction selectivity estimation function for this operator
(zero if none)
</p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
<code class="structfield">oprjoin</code> <code class="type">regproc</code>
(references <a class="link" href="catalog-pg-proc.html" title="53.39. pg_proc"><code class="structname">pg_proc</code></a>.<code class="structfield">oid</code>)
</p>
<p>
Join selectivity estimation function for this operator
(zero if none)
</p></td></tr></tbody></table></div></div><br class="table-break" /></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="catalog-pg-opclass.html" title="53.33. pg_opclass">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="catalogs.html" title="Chapter 53. System Catalogs">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="catalog-pg-opfamily.html" title="53.35. pg_opfamily">Next</a></td></tr><tr><td width="40%" align="left" valign="top">53.33. <code class="structname">pg_opclass</code> </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.7 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 53.35. <code class="structname">pg_opfamily</code></td></tr></table></div></body></html>
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