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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
128 lines
3.0 KiB
Plaintext
128 lines
3.0 KiB
Plaintext
<!--
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doc/src/sgml/ref/drop_trigger.sgml
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PostgreSQL documentation
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-->
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<refentry id="sql-droptrigger">
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<indexterm zone="sql-droptrigger">
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<primary>DROP TRIGGER</primary>
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</indexterm>
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<refmeta>
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<refentrytitle>DROP TRIGGER</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 TRIGGER</refname>
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<refpurpose>remove a trigger</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<synopsis>
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DROP TRIGGER [ IF EXISTS ] <replaceable class="parameter">name</replaceable> ON <replaceable class="parameter">table_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 TRIGGER</command> removes an existing
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trigger definition. To execute this command, the current
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user must be the owner of the table for which the trigger is defined.
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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 trigger 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 the trigger to remove.
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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">table_name</replaceable></term>
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<listitem>
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<para>
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The name (optionally schema-qualified) of the table for which
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the trigger is defined.
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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 trigger,
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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 trigger 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-droptrigger-examples">
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<title>Examples</title>
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<para>
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Destroy the trigger <literal>if_dist_exists</literal> on the table
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<literal>films</literal>:
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<programlisting>
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DROP TRIGGER if_dist_exists ON films;
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</programlisting></para>
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</refsect1>
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<refsect1 id="sql-droptrigger-compatibility">
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<title>Compatibility</title>
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<para>
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The <command>DROP TRIGGER</command> statement in
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<productname>PostgreSQL</productname> is incompatible with the SQL
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standard. In the SQL standard, trigger names are not local to
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tables, so the command is simply <literal>DROP TRIGGER
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<replaceable>name</replaceable></literal>.
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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-createtrigger"/></member>
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</simplelist>
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</refsect1>
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</refentry>
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