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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>51.34. 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 V1.79.1" /><link rel="prev" href="catalog-pg-opclass.html" title="51.33. pg_opclass" /><link rel="next" href="catalog-pg-opfamily.html" title="51.35. pg_opfamily" /></head><body id="docContent" class="container-fluid col-10"><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">51.34. <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="51.33. pg_opclass">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="catalogs.html" title="Chapter 51. System Catalogs">Up</a></td><th width="60%" align="center">Chapter 51. System Catalogs</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 13.1 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="catalog-pg-opfamily.html" title="51.35. 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">51.34. <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="37.14. User-Defined Operators">Section 37.14</a> for more information.
  </p><div class="table" id="id-1.10.4.36.4"><p class="title"><strong>Table 51.34. <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="51.32. 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="51.8. 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 (<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>)
      </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="51.62. pg_type"><code class="structname">pg_type</code></a>.<code class="structfield">oid</code>)
      </p>
      <p>
       Type of the left operand
      </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="51.62. 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="51.62. pg_type"><code class="structname">pg_type</code></a>.<code class="structfield">oid</code>)
      </p>
      <p>
       Type of the result
      </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="51.34. pg_operator"><code class="structname">pg_operator</code></a>.<code class="structfield">oid</code>)
      </p>
      <p>
       Commutator of this operator, if any
      </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="51.34. pg_operator"><code class="structname">pg_operator</code></a>.<code class="structfield">oid</code>)
      </p>
      <p>
       Negator of this operator, if any
      </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="51.38. pg_proc"><code class="structname">pg_proc</code></a>.<code class="structfield">oid</code>)
      </p>
      <p>
       Function that implements this 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="51.38. pg_proc"><code class="structname">pg_proc</code></a>.<code class="structfield">oid</code>)
      </p>
      <p>
       Restriction selectivity estimation function for this operator
      </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="51.38. pg_proc"><code class="structname">pg_proc</code></a>.<code class="structfield">oid</code>)
      </p>
      <p>
       Join selectivity estimation function for this operator
      </p></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 xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navfooter"><hr></hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="catalog-pg-opclass.html" title="51.33. pg_opclass">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="catalogs.html" title="Chapter 51. System Catalogs">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="catalog-pg-opfamily.html" title="51.35. pg_opfamily">Next</a></td></tr><tr><td width="40%" align="left" valign="top">51.33. <code xmlns="http://www.w3.org/1999/xhtml" class="structname">pg_opclass</code> </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 13.1 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 51.35. <code xmlns="http://www.w3.org/1999/xhtml" class="structname">pg_opfamily</code></td></tr></table></div></body></html>