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<!-- $Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_conversion.sgml,v 1.3 2002/09/21 18:32:54 petere Exp $ -->
<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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End:
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