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<!--
doc/src/sgml/ref/drop_sequence.sgml
PostgreSQL documentation
-->
<refentry id="sql-dropsequence">
<indexterm zone="sql-dropsequence">
<primary>DROP SEQUENCE</primary>
</indexterm>
<refmeta>
<refentrytitle>DROP SEQUENCE</refentrytitle>
<manvolnum>7</manvolnum>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>DROP SEQUENCE</refname>
<refpurpose>remove a sequence</refpurpose>
</refnamediv>
<refsynopsisdiv>
<synopsis>
DROP SEQUENCE [ IF EXISTS ] <replaceable class="parameter">name</replaceable> [, ...] [ CASCADE | RESTRICT ]
</synopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>
<command>DROP SEQUENCE</command> removes sequence number
generators. A sequence can only be dropped by its owner or a superuser.
</para>
</refsect1>
<refsect1>
<title>Parameters</title>
<variablelist>
<varlistentry>
<term><literal>IF EXISTS</literal></term>
<listitem>
<para>
Do not throw an error if the sequence does not exist. A notice is issued
in this case.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">name</replaceable></term>
<listitem>
<para>
The name (optionally schema-qualified) of a sequence.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>CASCADE</literal></term>
<listitem>
<para>
Automatically drop objects that depend on the sequence,
and in turn all objects that depend on those objects
(see <xref linkend="ddl-depend"/>).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>RESTRICT</literal></term>
<listitem>
<para>
Refuse to drop the sequence if any objects depend on it. This
is the default.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
To remove the sequence <literal>serial</literal>:
<programlisting>
DROP SEQUENCE serial;
</programlisting></para>
</refsect1>
<refsect1>
<title>Compatibility</title>
<para>
<command>DROP SEQUENCE</command> conforms to the <acronym>SQL</acronym>
standard, except that the standard only allows one
sequence to be dropped per command, and apart from the
<literal>IF EXISTS</literal> option, which is a <productname>PostgreSQL</productname>
extension.
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<simplelist type="inline">
<member><xref linkend="sql-createsequence"/></member>
<member><xref linkend="sql-altersequence"/></member>
</simplelist>
</refsect1>
</refentry>
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