208 lines
4.2 KiB
Plaintext
208 lines
4.2 KiB
Plaintext
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<REFENTRY ID="SQL-DROPVIEW">
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<REFMETA>
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<REFENTRYTITLE>
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DROP VIEW
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</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 VIEW
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</REFNAME>
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<REFPURPOSE>
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Removes an existing view from a database
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</REFPURPOSE>
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<REFSYNOPSISDIV>
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<REFSYNOPSISDIVINFO>
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<DATE>1998-04-15</DATE>
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</REFSYNOPSISDIVINFO>
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<SYNOPSIS>
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DROP VIEW <REPLACEABLE CLASS="PARAMETER">view</REPLACEABLE>
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</SYNOPSIS>
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<REFSECT2 ID="R2-SQL-DROPVIEW-1">
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<REFSECT2INFO>
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<DATE>1998-04-15</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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</PARA>
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<VARIABLELIST>
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<VARLISTENTRY>
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<TERM>
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</TERM>
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<LISTITEM>
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<PARA>
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<VARIABLELIST>
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<VARLISTENTRY>
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<TERM>
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<ReturnValue><REPLACEABLE CLASS="PARAMETER">view</REPLACEABLE></ReturnValue>
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</TERM>
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<LISTITEM>
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<PARA>
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The name of an existing view to drop.
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</PARA>
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</LISTITEM>
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</VARLISTENTRY>
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</variablelist>
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</LISTITEM>
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</VARLISTENTRY>
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</VARIABLELIST>
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</REFSECT2>
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<REFSECT2 ID="R2-SQL-DROPVIEW-2">
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<REFSECT2INFO>
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<DATE>1998-04-15</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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</PARA>
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<VARIABLELIST>
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<VARLISTENTRY>
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<TERM>
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</TERM>
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<LISTITEM>
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<PARA>
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<VARIABLELIST>
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<VARLISTENTRY>
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<TERM>
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<ReturnValue>DROP</ReturnValue>
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</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>
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<ReturnValue>
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ERROR: RewriteGetRuleEventRel: rule "_RET<REPLACEABLE CLASS="PARAMETER">view</REPLACEABLE>" not found</ReturnValue>
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</TERM>
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<LISTITEM>
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<PARA>
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This message occurs if the specified view does not exist in
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the database.
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</PARA>
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</LISTITEM>
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</VARLISTENTRY>
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</variablelist>
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</LISTITEM>
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</VARLISTENTRY>
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</variablelist>
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</REFSECT2>
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</REFSYNOPSISDIV>
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<REFSECT1 ID="R1-SQL-DROPVIEW-1">
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<REFSECT1INFO>
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<DATE>1998-04-15</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 VIEW</command> drops an existing view from the database.
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To execute this command you must be the owner of the
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view.
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</PARA>
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<REFSECT2 ID="R2-SQL-DROPVIEW-3">
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<REFSECT2INFO>
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<DATE>1998-04-15</DATE>
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</REFSECT2INFO>
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<TITLE>
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Notes
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</TITLE>
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<PARA>
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The PostgreSQL <command>DROP TABLE</command> statement also drops views.
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</PARA>
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<PARA>
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Refer to the<command> CREATE VIEW</command> statement for information on how to create views.
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</PARA>
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</REFSECT2>
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<REFSECT1 ID="R1-SQL-DROPVIEW-2">
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<TITLE>
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Usage
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</TITLE>
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<PARA>
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This command will remove the view called <literal>kinds</literal>:
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</PARA>
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<ProgramListing>
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DROP VIEW kinds
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</ProgramListing>
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</REFSECT1>
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<REFSECT1 ID="R1-SQL-DROPVIEW-3">
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<TITLE>
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Compatibility
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</TITLE>
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<PARA>
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</PARA>
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<REFSECT2 ID="R2-SQL-DROPVIEW-4">
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<REFSECT2INFO>
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<DATE>1998-04-15</DATE>
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</REFSECT2INFO>
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<TITLE>
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SQL92
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</TITLE>
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<PARA>
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SQL92 specifies some additional capabilities for
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<command>DROP VIEW</command>:
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</PARA>
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<synopsis>
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DROP VIEW <replaceable class="parameter">view</replaceable> {RESTRICT | CASCADE}
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</synopsis>
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<variablelist>
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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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Ensures that only a view with no dependent views or
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integrity constraints can be destroyed.
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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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Any referencing views and integrity constraints
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will be dropped as well.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<tip>
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<para>
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At present, to remove a referenced view from a PostgreSQL database,
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you must drop it by hand.
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</para>
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</tip>
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</refsect2>
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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:t
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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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