codekingpro/portable-devtools

1<?xml version="1.0" encoding="UTF-8" standalone="no"?>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>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 16.3 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> <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="38.14. User-Defined Operators">Section 38.14</a> for more information.6  </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">7       Column Type8      </p>9      <p>10       Description11      </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 identifier16      </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 operator21      </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="53.32. 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 operator27      </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="53.8. pg_authid"><code class="structname">pg_authid</code></a>.<code class="structfield">oid</code>)30      </p>31      <p>32       Owner of the operator33      </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 joins44      </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 joins49      </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="53.64. 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="53.64. pg_type"><code class="structname">pg_type</code></a>.<code class="structfield">oid</code>)58      </p>59      <p>60       Type of the right operand61      </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="53.64. pg_type"><code class="structname">pg_type</code></a>.<code class="structfield">oid</code>)64      </p>65      <p>66       Type of the result67       (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="53.34. 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="53.34. 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="53.39. pg_proc"><code class="structname">pg_proc</code></a>.<code class="structfield">oid</code>)83      </p>84      <p>85       Function that implements this operator86       (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="53.39. 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 operator93       (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="53.39. 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 operator100       (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="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%" 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