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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
132 lines
3.0 KiB
Plaintext
132 lines
3.0 KiB
Plaintext
<!--
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doc/src/sgml/ref/drop_schema.sgml
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PostgreSQL documentation
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-->
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<refentry id="sql-dropschema">
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<indexterm zone="sql-dropschema">
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<primary>DROP SCHEMA</primary>
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</indexterm>
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<refmeta>
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<refentrytitle>DROP SCHEMA</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 SCHEMA</refname>
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<refpurpose>remove a schema</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<synopsis>
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DROP SCHEMA [ 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 SCHEMA</command> removes schemas from the database.
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</para>
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<para>
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A schema can only be dropped by its owner or a superuser. Note that
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the owner can drop the schema (and thereby all contained objects)
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even if they do not own some of the objects within the schema.
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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 schema 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 of a schema.
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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 (tables, functions, etc.) that are
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contained in the schema,
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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 schema if it contains any objects. 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>
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<title>Notes</title>
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<para>
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Using the <literal>CASCADE</literal> option might make the command
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remove objects in other schemas besides the one(s) named.
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</para>
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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 schema <literal>mystuff</literal> from the database,
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along with everything it contains:
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<programlisting>
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DROP SCHEMA mystuff CASCADE;
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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 SCHEMA</command> is fully conforming with the SQL
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standard, except that the standard only allows one schema to be
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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-alterschema"/></member>
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<member><xref linkend="sql-createschema"/></member>
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</simplelist>
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</refsect1>
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</refentry>
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