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