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   2 <!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 id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">52.34. <code 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 18.0 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 /></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> <a href="#CATALOG-PG-OPERATOR" class="id_link">#</a></h2></div></div></div><a id="id-1.10.4.36.2" class="indexterm"></a><p>
   3    The catalog <code class="structname">pg_operator</code> stores information about operators.
   4    See <a class="xref" href="sql-createoperator.html" title="CREATE OPERATOR"><span class="refentrytitle">CREATE OPERATOR</span></a>
   5    and <a class="xref" href="xoper.html" title="36.14. User-Defined Operators">Section 36.14</a> for more information.
   6   </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 /></colgroup><thead><tr><th class="catalog_table_entry"><p class="column_definition">
   7        Column Type
   8       </p>
   9       <p>
  10        Description
  11       </p></th></tr></thead><tbody><tr><td class="catalog_table_entry"><p class="column_definition">
  12        <code class="structfield">oid</code> <code class="type">oid</code>
  13       </p>
  14       <p>
  15        Row identifier
  16       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  17        <code class="structfield">oprname</code> <code class="type">name</code>
  18       </p>
  19       <p>
  20        Name of the operator
  21       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  22        <code class="structfield">oprnamespace</code> <code class="type">oid</code>
  23        (references <a class="link" href="catalog-pg-namespace.html" title="52.32. pg_namespace"><code class="structname">pg_namespace</code></a>.<code class="structfield">oid</code>)
  24       </p>
  25       <p>
  26        The OID of the namespace that contains this operator
  27       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  28        <code class="structfield">oprowner</code> <code class="type">oid</code>
  29        (references <a class="link" href="catalog-pg-authid.html" title="52.8. pg_authid"><code class="structname">pg_authid</code></a>.<code class="structfield">oid</code>)
  30       </p>
  31       <p>
  32        Owner of the operator
  33       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  34        <code class="structfield">oprkind</code> <code class="type">char</code>
  35       </p>
  36       <p>
  37        <code class="literal">b</code> = infix operator (<span class="quote">“<span class="quote">both</span>”</span>),
  38        or <code class="literal">l</code> = prefix operator (<span class="quote">“<span class="quote">left</span>”</span>)
  39       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  40        <code class="structfield">oprcanmerge</code> <code class="type">bool</code>
  41       </p>
  42       <p>
  43        This operator supports merge joins
  44       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  45        <code class="structfield">oprcanhash</code> <code class="type">bool</code>
  46       </p>
  47       <p>
  48        This operator supports hash joins
  49       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  50        <code class="structfield">oprleft</code> <code class="type">oid</code>
  51        (references <a class="link" href="catalog-pg-type.html" title="52.64. pg_type"><code class="structname">pg_type</code></a>.<code class="structfield">oid</code>)
  52       </p>
  53       <p>
  54        Type of the left operand (zero for a prefix operator)
  55       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  56        <code class="structfield">oprright</code> <code class="type">oid</code>
  57        (references <a class="link" href="catalog-pg-type.html" title="52.64. pg_type"><code class="structname">pg_type</code></a>.<code class="structfield">oid</code>)
  58       </p>
  59       <p>
  60        Type of the right operand
  61       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  62        <code class="structfield">oprresult</code> <code class="type">oid</code>
  63        (references <a class="link" href="catalog-pg-type.html" title="52.64. pg_type"><code class="structname">pg_type</code></a>.<code class="structfield">oid</code>)
  64       </p>
  65       <p>
  66        Type of the result
  67        (zero for a not-yet-defined <span class="quote">“<span class="quote">shell</span>”</span> operator)
  68       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  69        <code class="structfield">oprcom</code> <code class="type">oid</code>
  70        (references <a class="link" href="catalog-pg-operator.html" title="52.34. pg_operator"><code class="structname">pg_operator</code></a>.<code class="structfield">oid</code>)
  71       </p>
  72       <p>
  73        Commutator of this operator (zero if none)
  74       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  75        <code class="structfield">oprnegate</code> <code class="type">oid</code>
  76        (references <a class="link" href="catalog-pg-operator.html" title="52.34. pg_operator"><code class="structname">pg_operator</code></a>.<code class="structfield">oid</code>)
  77       </p>
  78       <p>
  79        Negator of this operator (zero if none)
  80       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  81        <code class="structfield">oprcode</code> <code class="type">regproc</code>
  82        (references <a class="link" href="catalog-pg-proc.html" title="52.39. pg_proc"><code class="structname">pg_proc</code></a>.<code class="structfield">oid</code>)
  83       </p>
  84       <p>
  85        Function that implements this operator
  86        (zero for a not-yet-defined <span class="quote">“<span class="quote">shell</span>”</span> operator)
  87       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  88        <code class="structfield">oprrest</code> <code class="type">regproc</code>
  89        (references <a class="link" href="catalog-pg-proc.html" title="52.39. pg_proc"><code class="structname">pg_proc</code></a>.<code class="structfield">oid</code>)
  90       </p>
  91       <p>
  92        Restriction selectivity estimation function for this operator
  93        (zero if none)
  94       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  95        <code class="structfield">oprjoin</code> <code class="type">regproc</code>
  96        (references <a class="link" href="catalog-pg-proc.html" title="52.39. pg_proc"><code class="structname">pg_proc</code></a>.<code class="structfield">oid</code>)
  97       </p>
  98       <p>
  99        Join selectivity estimation function for this operator
 100        (zero if none)
 101       </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="52.33. pg_opclass">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="catalogs.html" title="Chapter 52. System Catalogs">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="catalog-pg-opfamily.html" title="52.35. pg_opfamily">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" title="PostgreSQL 18.0 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 52.35. <code class="structname">pg_opfamily</code></td></tr></table></div></body></html>