164 lines
3.6 KiB
Plaintext
164 lines
3.6 KiB
Plaintext
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_type.sgml,v 1.20 2002/11/21 23:34:43 petere Exp $
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PostgreSQL documentation
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-->
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<refentry id="SQL-DROPTYPE">
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<refmeta>
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<refentrytitle id="SQL-DROPTYPE-TITLE">DROP TYPE</refentrytitle>
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<refmiscinfo>SQL - Language Statements</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>
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DROP TYPE
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</refname>
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<refpurpose>
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remove a user-defined data type
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</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<refsynopsisdivinfo>
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<date>1999-07-20</date>
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</refsynopsisdivinfo>
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<synopsis>
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DROP TYPE <replaceable class="PARAMETER">typename</replaceable> [, ...] [ CASCADE | RESTRICT ]
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</synopsis>
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<refsect2 id="R2-SQL-DROPTYPE-1">
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<refsect2info>
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<date>1998-09-22</date>
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</refsect2info>
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<title>
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Inputs
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</title>
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<para>
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<variablelist>
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<varlistentry>
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<term><replaceable class="PARAMETER">typename</replaceable></term>
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<listitem>
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<para>
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The name (optionally schema-qualified) of an existing type.
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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>CASCADE</term>
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<listitem>
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<para>
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Automatically drop objects that depend on the type
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(such as table columns, functions, operators, etc).
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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>RESTRICT</term>
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<listitem>
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<para>
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Refuse to drop the type if there are any dependent objects.
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This 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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</para>
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</refsect2>
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<refsect2 id="R2-SQL-DROPTYPE-2">
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<refsect2info>
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<date>1998-09-22</date>
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</refsect2info>
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<title>
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Outputs
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</title>
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<para>
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<variablelist>
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<varlistentry>
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<term><computeroutput>
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DROP TYPE
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</computeroutput></term>
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<listitem>
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<para>
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The message returned if the command is successful.
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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><computeroutput>
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ERROR: RemoveType: type '<replaceable class="parameter">typename</replaceable>' does not exist
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</computeroutput></term>
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<listitem>
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<para>
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This message occurs if the specified type is not found.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect2>
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</refsynopsisdiv>
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<refsect1 id="R1-SQL-DROPTYPE-1">
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<refsect1info>
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<date>1998-09-22</date>
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</refsect1info>
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<title>
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Description
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</title>
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<para>
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<command>DROP TYPE</command> will remove a user type from the
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system catalogs.
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</para>
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<para>
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Only the owner of a type can remove it.
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</para>
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</refsect1>
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<refsect1 id="SQL-DROPTYPE-examples">
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<title>Examples</title>
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<para>
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To remove the <type>box</type> type:
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<programlisting>
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DROP TYPE box;
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</programlisting>
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</para>
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</refsect1>
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<refsect1 id="SQL-DROPTYPE-compatibility">
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<title>Compatibility</title>
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<para>
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Note that the <command>CREATE TYPE</command> command and the data
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type extension mechanisms in <productname>PostgreSQL</productname>
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differ from SQL99.
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</para>
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</refsect1>
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<refsect1 id="SQL-DROPTYPE-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-createtype" endterm="sql-createtype-title"></member>
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</simplelist>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:nil
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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sgml-parent-document:nil
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sgml-default-dtd-file:"../reference.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:"/usr/lib/sgml/catalog"
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sgml-local-ecat-files:nil
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End:
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-->
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