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<!-- $PostgreSQL: pgsql/doc/src/sgml/ref/drop_conversion.sgml,v 1.11 2007/01/31 23:26:03 momjian 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 conversion</refpurpose>
</refnamediv>
<indexterm zone="sql-dropconversion">
<primary>DROP CONVERSION</primary>
</indexterm>
<refsynopsisdiv>
<synopsis>
DROP CONVERSION [ IF EXISTS ] <replaceable>name</replaceable> [ CASCADE | RESTRICT ]
</synopsis>
</refsynopsisdiv>
<refsect1 id="sql-dropconversion-description">
<title>Description</title>
<para>
<command>DROP CONVERSION</command> removes a previously defined conversion.
To be able to drop a conversion, you must own the conversion.
</para>
</refsect1>
<refsect1>
<title>Parameters</title>
<variablelist>
<varlistentry>
<term><literal>IF EXISTS</literal></term>
<listitem>
<para>
Do not throw an error if the conversion does not exist.
A notice is issued in this case.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>name</replaceable></term>
<listitem>
<para>
The name of the conversion. The conversion name can 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-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>
There is no <command>DROP CONVERSION</command> statement in the SQL
standard.
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<simplelist type="inline">
<member><xref linkend="sql-alterconversion" endterm="sql-alterconversion-title"></member>
<member><xref linkend="sql-createconversion" endterm="sql-createconversion-title"></member>
</simplelist>
</refsect1>
</refentry>
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