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<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/drop_opclass.sgml,v 1.8 2003/11/29 19:51:38 pgsql Exp $
PostgreSQL documentation
-->
<refentry id="SQL-DROPOPCLASS">
<refmeta>
<refentrytitle id="SQL-DROPOPCLASS-TITLE">DROP OPERATOR CLASS</refentrytitle>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>DROP OPERATOR CLASS</refname>
<refpurpose>remove an operator class</refpurpose>
</refnamediv>
<indexterm zone="sql-dropopclass">
<primary>DROP OPERATOR CLASS</primary>
</indexterm>
<refsynopsisdiv>
<synopsis>
DROP OPERATOR CLASS <replaceable class="PARAMETER">name</replaceable> USING <replaceable class="PARAMETER">index_method</replaceable> [ CASCADE | RESTRICT ]
</synopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>
<command>DROP OPERATOR CLASS</command> drops an existing operator class.
To execute this command you must be the owner of the operator class.
</para>
</refsect1>
<refsect1>
<title>Parameters</title>
<variablelist>
<varlistentry>
<term><replaceable class="parameter">name</replaceable></term>
<listitem>
<para>
The name (optionally schema-qualified) of an existing operator class.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">index_method</replaceable></term>
<listitem>
<para>
The name of the index access method the operator class is for.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>CASCADE</literal></term>
<listitem>
<para>
Automatically drop objects that depend on the operator class.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>RESTRICT</literal></term>
<listitem>
<para>
Refuse to drop the operator class if any objects depend on it.
This is the default.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
Remove the B-tree operator class <literal>widget_ops</literal>:
<programlisting>
DROP OPERATOR CLASS widget_ops USING btree;
</programlisting>
This command will not succeed if there are any existing indexes
that use the operator class. Add <literal>CASCADE</> to drop
such indexes along with the operator class.
</para>
</refsect1>
<refsect1>
<title>Compatibility</title>
<para>
There is no <command>DROP OPERATOR CLASS</command> statement in the
SQL standard.
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<simplelist type="inline">
<member><xref linkend="sql-alteropclass" endterm="sql-alteropclass-title"></member>
<member><xref linkend="sql-createopclass" endterm="sql-createopclass-title"></member>
</simplelist>
</refsect1>
</refentry>
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