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<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 a user-defined operator class
  </refpurpose>
 </refnamediv>
  
 <refsynopsisdiv>
  <refsynopsisdivinfo>
   <date>2002-07-28</date>
  </refsynopsisdivinfo>
  <synopsis>
DROP OPERATOR CLASS <replaceable class="PARAMETER">name</replaceable> USING <replaceable class="PARAMETER">access_method</replaceable> [ CASCADE | RESTRICT ]
  </synopsis>
  
  <refsect2 id="R2-SQL-DROPOPCLASS-1">
   <refsect2info>
    <date>2002-07-28</date>
   </refsect2info>
   <title>
    Inputs
   </title>
   <para>
    <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">access_method</replaceable></term>
      <listitem>
       <para>
	The name of the index access method the operator class is for.
       </para>
      </listitem>
     </varlistentry>
     <varlistentry>
      <term>CASCADE</term>
      <listitem>
       <para>
        Automatically drop objects that depend on the operator class.
       </para>
      </listitem>
     </varlistentry>
     <varlistentry>
      <term>RESTRICT</term>
      <listitem>
       <para>
        Refuse to drop the operator class if there are any dependent objects.
	This is the default.
       </para>
      </listitem>
     </varlistentry>
    </variablelist>
   </para>
  </refsect2>

  <refsect2 id="R2-SQL-DROPOPCLASS-2">
   <refsect2info>
    <date>2002-07-28</date>
   </refsect2info>
   <title>
    Outputs
   </title>
   <para>

    <variablelist>
     <varlistentry>
      <term><computeroutput>
DROP OPERATOR CLASS
       </computeroutput></term>
      <listitem>
       <para>
	The message returned if the command is successful.
       </para>
      </listitem>
     </varlistentry>
    </variablelist>
   </para>
  </refsect2>
 </refsynopsisdiv>

 <refsect1 id="R1-SQL-DROPOPCLASS-1">
  <refsect1info>
   <date>2002-07-28</date>
  </refsect1info>
  <title>
   Description
  </title>
  <para>
   <command>DROP OPERATOR CLASS</command> drops an existing operator class
   from the database.
   To execute this command you must be the owner of the operator class.
  </para>

  <refsect2 id="R2-SQL-DROPOPCLASS-3">
   <refsect2info>
    <date>2002-07-28</date>
   </refsect2info>
   <title>
    Notes
   </title>
   <para>
    The <command>DROP OPERATOR CLASS</command> statement is a 
    <productname>PostgreSQL</productname>
    language extension.
   </para>
   <para>
    Refer to
    <xref linkend="sql-createopclass" endterm="sql-createopclass-title">
    for information on how to create operator classes.
   </para>
  </refsect2>
 </refsect1>

 <refsect1 id="R1-SQL-DROPOPCLASS-2">
  <title>
   Usage
  </title>
  <para>
   Remove B-tree operator class <literal>widget_ops</literal>:

   <programlisting>
DROP OPERATOR CLASS widget_ops USING btree;
   </programlisting>

   This command will not execute 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 id="R1-SQL-DROPOPCLASS-3">
  <title>
   Compatibility
  </title>

  <refsect2 id="R2-SQL-DROPOPCLASS-4">
   <refsect2info>
    <date>2002-07-28</date>
   </refsect2info>
   <title>
    SQL92
   </title>
   <para>
    There is no <command>DROP OPERATOR CLASS</command> in
    <acronym>SQL92</acronym>.
   </para>
  </refsect2>
 </refsect1>
</refentry>

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