<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!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>52.34. 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="52.33. pg_opclass" /><link rel="next" href="catalog-pg-opfamily.html" title="52.35. pg_opfamily" /></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">52.34. <code xmlns="http://www.w3.org/1999/xhtml" class="structname">pg_operator</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="catalog-pg-opclass.html" title="52.33. pg_opclass">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-opfamily.html" title="52.35. pg_opfamily">Next</a></td></tr></table><hr></hr></div><div class="sect1" id="CATALOG-PG-OPERATOR"><div class="titlepage"><div><div><h2 class="title" style="clear: both">52.34. <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="38.13. User-defined Operators">Section 38.13</a> for more information.
</p><div class="table" id="id-1.10.4.36.4"><p class="title"><strong>Table 52.34. <code class="structname">pg_operator</code> Columns</strong></p><div class="table-contents"><table class="table" summary="pg_operator Columns" border="1"><colgroup><col /><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">oprname</code></td><td><code class="type">name</code></td><td> </td><td>Name of the operator</td></tr><tr><td><code class="structfield">oprnamespace</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>
The OID of the namespace that contains this operator
</td></tr><tr><td><code class="structfield">oprowner</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 operator</td></tr><tr><td><code class="structfield">oprkind</code></td><td><code class="type">char</code></td><td> </td><td>
<code class="literal">b</code> = infix (<span class="quote">“<span class="quote">both</span>”</span>), <code class="literal">l</code> = prefix
(<span class="quote">“<span class="quote">left</span>”</span>), <code class="literal">r</code> = postfix (<span class="quote">“<span class="quote">right</span>”</span>)
</td></tr><tr><td><code class="structfield">oprcanmerge</code></td><td><code class="type">bool</code></td><td> </td><td>This operator supports merge joins</td></tr><tr><td><code class="structfield">oprcanhash</code></td><td><code class="type">bool</code></td><td> </td><td>This operator supports hash joins</td></tr><tr><td><code class="structfield">oprleft</code></td><td><code class="type">oid</code></td><td><code class="literal"><a class="link" href="catalog-pg-type.html" title="52.62. pg_type"><code class="structname">pg_type</code></a>.oid</code></td><td>Type of the left operand</td></tr><tr><td><code class="structfield">oprright</code></td><td><code class="type">oid</code></td><td><code class="literal"><a class="link" href="catalog-pg-type.html" title="52.62. pg_type"><code class="structname">pg_type</code></a>.oid</code></td><td>Type of the right operand</td></tr><tr><td><code class="structfield">oprresult</code></td><td><code class="type">oid</code></td><td><code class="literal"><a class="link" href="catalog-pg-type.html" title="52.62. pg_type"><code class="structname">pg_type</code></a>.oid</code></td><td>Type of the result</td></tr><tr><td><code class="structfield">oprcom</code></td><td><code class="type">oid</code></td><td><code class="literal"><a class="link" href="catalog-pg-operator.html" title="52.34. pg_operator"><code class="structname">pg_operator</code></a>.oid</code></td><td>Commutator of this operator, if any</td></tr><tr><td><code class="structfield">oprnegate</code></td><td><code class="type">oid</code></td><td><code class="literal"><a class="link" href="catalog-pg-operator.html" title="52.34. pg_operator"><code class="structname">pg_operator</code></a>.oid</code></td><td>Negator of this operator, if any</td></tr><tr><td><code class="structfield">oprcode</code></td><td><code class="type">regproc</code></td><td><code class="literal"><a class="link" href="catalog-pg-proc.html" title="52.39. pg_proc"><code class="structname">pg_proc</code></a>.oid</code></td><td>Function that implements this operator</td></tr><tr><td><code class="structfield">oprrest</code></td><td><code class="type">regproc</code></td><td><code class="literal"><a class="link" href="catalog-pg-proc.html" title="52.39. pg_proc"><code class="structname">pg_proc</code></a>.oid</code></td><td>Restriction selectivity estimation function for this operator</td></tr><tr><td><code class="structfield">oprjoin</code></td><td><code class="type">regproc</code></td><td><code class="literal"><a class="link" href="catalog-pg-proc.html" title="52.39. pg_proc"><code class="structname">pg_proc</code></a>.oid</code></td><td>Join selectivity estimation function for this operator</td></tr></tbody></table></div></div><br class="table-break" /><p>
Unused column contain zeroes. For example, <code class="structfield">oprleft</code>
is zero for a prefix operator.
</p></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">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-opfamily.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">52.33. <code class="structname">pg_opclass</code> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> 52.35. <code class="structname">pg_opfamily</code></td></tr></table></div></body></html>
