115 lines
2.7 KiB
Plaintext
115 lines
2.7 KiB
Plaintext
<!--
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doc/src/sgml/ref/drop_collation.sgml
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PostgreSQL documentation
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-->
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<refentry id="sql-dropcollation">
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<indexterm zone="sql-dropcollation">
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<primary>DROP COLLATION</primary>
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</indexterm>
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<refmeta>
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<refentrytitle>DROP COLLATION</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 COLLATION</refname>
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<refpurpose>remove a collation</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<synopsis>
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DROP COLLATION [ IF EXISTS ] <replaceable>name</replaceable> [ CASCADE | RESTRICT ]
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</synopsis>
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</refsynopsisdiv>
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<refsect1 id="sql-dropcollation-description">
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<title>Description</title>
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<para>
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<command>DROP COLLATION</command> removes a previously defined collation.
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To be able to drop a collation, you must own the collation.
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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 collation does not exist.
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A notice is issued 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>name</replaceable></term>
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<listitem>
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<para>
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The name of the collation. The collation name can be
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schema-qualified.
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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 collation,
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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 collation 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 id="sql-dropcollation-examples">
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<title>Examples</title>
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<para>
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To drop the collation named <literal>german</literal>:
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<programlisting>
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DROP COLLATION german;
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</programlisting></para>
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</refsect1>
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<refsect1 id="sql-dropcollation-compat">
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<title>Compatibility</title>
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<para>
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The <command>DROP COLLATION</command> command conforms to the
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<acronym>SQL</acronym> standard, apart from the <literal>IF
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EXISTS</literal> option, which is a <productname>PostgreSQL</productname> 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-altercollation"/></member>
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<member><xref linkend="sql-createcollation"/></member>
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</simplelist>
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</refsect1>
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</refentry>
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