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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
115 lines
2.5 KiB
Plaintext
115 lines
2.5 KiB
Plaintext
<!--
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doc/src/sgml/ref/drop_domain.sgml
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PostgreSQL documentation
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-->
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<refentry id="sql-dropdomain">
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<indexterm zone="sql-dropdomain">
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<primary>DROP DOMAIN</primary>
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</indexterm>
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<refmeta>
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<refentrytitle>DROP DOMAIN</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 DOMAIN</refname>
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<refpurpose>remove a domain</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<synopsis>
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DROP DOMAIN [ 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 DOMAIN</command> removes a domain. Only the owner of
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a domain can remove it.
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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 domain 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 an existing domain.
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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 domain (such as
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table columns),
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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 domain if any objects depend on it. This is
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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 id="sql-dropdomain-examples">
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<title>Examples</title>
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<para>
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To remove the domain <type>box</type>:
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<programlisting>
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DROP DOMAIN box;
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</programlisting></para>
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</refsect1>
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<refsect1 id="sql-dropdomain-compatibility">
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<title>Compatibility</title>
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<para>
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This command conforms to the SQL standard, except for 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 id="sql-dropdomain-see-also">
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<title>See Also</title>
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<simplelist type="inline">
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<member><xref linkend="sql-createdomain"/></member>
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<member><xref linkend="sql-alterdomain"/></member>
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</simplelist>
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</refsect1>
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</refentry>
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