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>DROP OPERATOR CLASS</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="sql-dropoperator.html" title="DROP OPERATOR" /><link rel="next" href="sql-dropopfamily.html" title="DROP OPERATOR FAMILY" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">DROP OPERATOR CLASS</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="sql-dropoperator.html" title="DROP OPERATOR">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="sql-commands.html" title="SQL Commands">Up</a></td><th width="60%" align="center">SQL Commands</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="sql-dropopfamily.html" title="DROP OPERATOR FAMILY">Next</a></td></tr></table><hr /></div><div class="refentry" id="SQL-DROPOPCLASS"><div class="titlepage"></div><a id="id-1.9.3.120.1" class="indexterm"></a><div class="refnamediv"><h2><span class="refentrytitle">DROP OPERATOR CLASS</span></h2><p>DROP OPERATOR CLASS — remove an operator class</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">3DROP OPERATOR CLASS [ IF EXISTS ] <em class="replaceable"><code>name</code></em> USING <em class="replaceable"><code>index_method</code></em> [ CASCADE | RESTRICT ]4</pre></div><div class="refsect1" id="id-1.9.3.120.5"><h2>Description</h2><p>5   <code class="command">DROP OPERATOR CLASS</code> drops an existing operator class.6   To execute this command you must be the owner of the operator class.7  </p><p>8   <code class="command">DROP OPERATOR CLASS</code> does not drop any of the operators9   or functions referenced by the class.  If there are any indexes depending10   on the operator class, you will need to specify11   <code class="literal">CASCADE</code> for the drop to complete.12  </p></div><div class="refsect1" id="id-1.9.3.120.6"><h2>Parameters</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="literal">IF EXISTS</code></span></dt><dd><p>13      Do not throw an error if the operator class does not exist. A notice is issued14      in this case.15     </p></dd><dt><span class="term"><em class="replaceable"><code>name</code></em></span></dt><dd><p>16      The name (optionally schema-qualified) of an existing operator class.17     </p></dd><dt><span class="term"><em class="replaceable"><code>index_method</code></em></span></dt><dd><p>18      The name of the index access method the operator class is for.19     </p></dd><dt><span class="term"><code class="literal">CASCADE</code></span></dt><dd><p>20      Automatically drop objects that depend on the operator class (such as21      indexes), and in turn all objects that depend on those objects22      (see <a class="xref" href="ddl-depend.html" title="5.14. Dependency Tracking">Section 5.14</a>).23     </p></dd><dt><span class="term"><code class="literal">RESTRICT</code></span></dt><dd><p>24      Refuse to drop the operator class if any objects depend on it.25      This is the default.26     </p></dd></dl></div></div><div class="refsect1" id="id-1.9.3.120.7"><h2>Notes</h2><p>27   <code class="command">DROP OPERATOR CLASS</code> will not drop the operator family28   containing the class, even if there is nothing else left in the29   family (in particular, in the case where the family was implicitly30   created by <code class="command">CREATE OPERATOR CLASS</code>).  An empty operator31   family is harmless, but for the sake of tidiness you might wish to32   remove the family with <code class="command">DROP OPERATOR FAMILY</code>; or perhaps33   better, use <code class="command">DROP OPERATOR FAMILY</code> in the first place.34  </p></div><div class="refsect1" id="id-1.9.3.120.8"><h2>Examples</h2><p>35   Remove the B-tree operator class <code class="literal">widget_ops</code>:36 37</p><pre class="programlisting">38DROP OPERATOR CLASS widget_ops USING btree;39</pre><p>40 41   This command will not succeed if there are any existing indexes42   that use the operator class.  Add <code class="literal">CASCADE</code> to drop43   such indexes along with the operator class.44  </p></div><div class="refsect1" id="id-1.9.3.120.9"><h2>Compatibility</h2><p>45   There is no <code class="command">DROP OPERATOR CLASS</code> statement in the46   SQL standard.47  </p></div><div class="refsect1" id="id-1.9.3.120.10"><h2>See Also</h2><span class="simplelist"><a class="xref" href="sql-alteropclass.html" title="ALTER OPERATOR CLASS"><span class="refentrytitle">ALTER OPERATOR CLASS</span></a>, <a class="xref" href="sql-createopclass.html" title="CREATE OPERATOR CLASS"><span class="refentrytitle">CREATE OPERATOR CLASS</span></a>, <a class="xref" href="sql-dropopfamily.html" title="DROP OPERATOR FAMILY"><span class="refentrytitle">DROP OPERATOR FAMILY</span></a></span></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="sql-dropoperator.html" title="DROP OPERATOR">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="sql-commands.html" title="SQL Commands">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="sql-dropopfamily.html" title="DROP OPERATOR FAMILY">Next</a></td></tr><tr><td width="40%" align="left" valign="top">DROP OPERATOR </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 16.3 Documentation">Home</a></td><td width="40%" align="right" valign="top"> DROP OPERATOR FAMILY</td></tr></table></div></body></html>