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<refentry id="SQL-DROPCONVERSION">
 <refmeta>
  <refentrytitle id="SQL-DROPCONVERSION-TITLE">DROP CONVERSION</refentrytitle>
  <refmiscinfo>SQL - Language Statements</refmiscinfo>
 </refmeta>

 <refnamediv>
  <refname>DROP CONVERSION</refname>
  <refpurpose>remove a user-defined conversion</refpurpose>
 </refnamediv>

 <refsynopsisdiv>
<synopsis>
DROP CONVERSION <replaceable>conversion_name</replaceable>
    [ CASCADE | RESTRICT ]
</synopsis>
 </refsynopsisdiv>
  
 <refsect1 id="sql-dropconversion-description">
  <title>Description</title>

  <para>
   <command>DROP CONVERSION</command> removes a previously defined conversion.
  </para>

  <para>
   To be able to drop a conversion, you must own the conversion.
  </para>

   <variablelist>
    <title>Parameters</title>

    <varlistentry>
     <term><replaceable>conversion_name</replaceable></term>

     <listitem>
      <para>
       The name of the conversion. The conversion name may be
       schema-qualified.
      </para>
     </listitem>
    </varlistentry>

    <varlistentry>
     <term><literal>CASCADE</literal></term>
     <term><literal>RESTRICT</literal></term>

     <listitem>
      <para>
       These key words do not have any effect, since there are no
       dependencies on conversions.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>

 </refsect1>

 <refsect1 id="sql-dropconversion-notes">
  <title>Notes</title>

  <para>
   Use <command>CREATE CONVERSION</command> to create user-defined conversions.
  </para>

  <para>
   The privileges required to drop a conversion may be changed in a future
   release.
  </para>
 </refsect1>


 <refsect1 id="sql-dropconversion-examples">
  <title>Examples</title>

  <para>
   To drop the conversion named <literal>myname</>:
<programlisting>
DROP CONVERSION myname;
</programlisting>
  </para>
 </refsect1>

 
 <refsect1 id="sql-dropconversion-compat">
  <title>Compatibility</title>

  <para>
    <command>DROP CONVERSION</command>
    is a <productname>PostgreSQL</productname> extension.
    There is no <command>DROP CONVERSION</command>
    statement in <acronym>SQL99</acronym>.
  </para>
 </refsect1>


 <refsect1 id="sql-dropconversion-seealso">
  <title>See Also</title>

  <para>
   <xref linkend="sql-createconversion" endterm="sql-createconversion-title">
  </para>
 </refsect1>

</refentry>

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