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<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_index.sgml,v 1.18 2003/06/24 23:29:25 momjian Exp $
PostgreSQL documentation
-->
<refentry id="SQL-DROPINDEX">
<refmeta>
<refentrytitle id="SQL-DROPINDEX-TITLE">DROP INDEX</refentrytitle>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>DROP INDEX</refname>
<refpurpose>remove an index</refpurpose>
</refnamediv>
<refsynopsisdiv>
<synopsis>
DROP INDEX <replaceable class="PARAMETER">name</replaceable> [, ...] [ CASCADE | RESTRICT ]
</synopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>
<command>DROP INDEX</command> drops an existing index from the database
system. To execute this command you must be the owner of
the index.
</para>
</refsect1>
<refsect1>
<title>Parameters</title>
<variablelist>
<varlistentry>
<term><replaceable class="PARAMETER">name</replaceable></term>
<listitem>
<para>
The name (optionally schema-qualified) of an index to remove.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>CASCADE</literal></term>
<listitem>
<para>
Automatically drop objects that depend on the index.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>RESTRICT</literal></term>
<listitem>
<para>
Refuse to drop the index if any objects depend on it. This is
the default.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Diagnostics</title>
<variablelist>
<varlistentry>
<term><computeroutput>DROP INDEX</computeroutput></term>
<listitem>
<para>
Message returned if the command completes successfully.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><computeroutput>ERROR: index "<replaceable class="PARAMETER">name</replaceable>" does not exist</computeroutput></term>
<listitem>
<para>
This message is returned if <replaceable
class="PARAMETER">name</replaceable> is not an existing
index.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
This command will remove the index <literal>title_idx</literal>:
<programlisting>
DROP INDEX title_idx;
</programlisting>
</para>
</refsect1>
<refsect1>
<title>Compatibility</title>
<para>
<command>DROP INDEX</command> is a
<productname>PostgreSQL</productname> language extension. There
are no provisions for indexes in the SQL standard.
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<simplelist type="inline">
<member><xref linkend="sql-createindex" endterm="sql-createindex-title"></member>
</simplelist>
</refsect1>
</refentry>
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