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3c49c6facb
Since some preparation work had already been done, the only source changes left were changing empty-element tags like <xref linkend="foo"> to <xref linkend="foo"/>, and changing the DOCTYPE. The source files are still named *.sgml, but they are actually XML files now. Renaming could be considered later. In the build system, the intermediate step to convert from SGML to XML is removed. Everything is build straight from the source files again. The OpenSP (or the old SP) package is no longer needed. The documentation toolchain instructions are updated and are much simpler now. Peter Eisentraut, Alexander Lakhin, Jürgen Purtz
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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