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<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_domain.sgml,v 1.1 2002/03/06 20:34:44 momjian Exp $
PostgreSQL documentation
-->
<refentry id="SQL-DROPDOMAIN">
<refmeta>
<refentrytitle id="SQL-DROPDOMAIN-TITLE">
DROP DOMAIN
</refentrytitle>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>
DROP DOMAIN
</refname>
<refpurpose>
remove a user-defined domain
</refpurpose>
</refnamediv>
<refsynopsisdiv>
<refsynopsisdivinfo>
<date>1999-07-20</date>
</refsynopsisdivinfo>
<synopsis>
DROP DOMAIN <replaceable class="PARAMETER">domainname</replaceable> [, ...]
</synopsis>
<refsect2 id="R2-SQL-DROPDOMAIN-1">
<refsect2info>
<date>2002-02-24</date>
</refsect2info>
<title>
Inputs
</title>
<para>
<variablelist>
<varlistentry>
<term><replaceable class="PARAMETER">domainname</replaceable></term>
<listitem>
<para>
The name of an existing domain.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect2>
<refsect2 id="R2-SQL-DROPDOMAIN-2">
<refsect2info>
<date>2002-02-24</date>
</refsect2info>
<title>
Outputs
</title>
<para>
<variablelist>
<varlistentry>
<term><computeroutput>
DROP
</computeroutput></term>
<listitem>
<para>
The message returned if the command is successful.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><computeroutput>
ERROR: RemoveDomain: type '<replaceable class="parameter">domainname</replaceable>' does not exist
</computeroutput></term>
<listitem>
<para>
This message occurs if the specified domain (or type) is not found.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect2>
</refsynopsisdiv>
<refsect1 id="R1-SQL-DROPDOMAIN-1">
<refsect1info>
<date>2002-02-24</date>
</refsect1info>
<title>
Description
</title>
<para>
<command>DROP DOMAIN</command> will remove a user domain from the
system catalogs.
</para>
<para>
Only the owner of a domain can remove it.
</para>
</refsect1>
<refsect1 id="SQL-DROPDOMAIN-notes">
<title>Notes</title>
<itemizedlist>
<listitem>
<para>
It is the user's responsibility to remove any operators,
functions, aggregates, access methods, and tables that
use a deleted domain.
</para>
</listitem>
</itemizedlist>
</refsect1>
<refsect1 id="SQL-DROPDOMAIN-examples">
<title>Examples</title>
<para>
To remove the <type>box</type> domain:
<programlisting>
DROP DOMAIN box RESTRICT;
</programlisting>
</para>
</refsect1>
<refsect1 id="SQL-DROPDOMAIN-compatibility">
<title>Compatibility</title>
<para>
A <command>DROP DOMAIN</command> statement exists in SQL99. As with
most other <quote>drop</quote> commands, <command>DROP
DOMAIN</command> in SQL99 requires a <quote>drop behavior</quote>
clause to select between dropping all dependent objects or refusing
to drop if dependent objects exist:
<synopsis>
DROP DOMAIN <replaceable>name</replaceable> { CASCADE | RESTRICT }
</synopsis>
<productname>PostgreSQL</productname> enforces the existance of
RESTRICT or CASCADE but ignores their enforcement against the
system tables.
</para>
</refsect1>
<refsect1 id="SQL-DROPDOMAIN-see-also">
<title>See Also</title>
<simplelist type="inline">
<member><xref linkend="sql-createdomain"></member>
</simplelist>
</refsect1>
</refentry>
<!-- Keep this comment at the end of the file
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