mirror of
https://github.com/postgres/postgres.git
synced 2025-07-05 07:21:24 +03:00
6ef2448796
There is what may actually be a mistake in our markup. The problem is in a situation like <para> <command>FOO</command> is ... there is strictly speaking a line break before "FOO". In the HTML output, this does not appear to be a problem, but in the man page output, this shows up, so you get double blank lines at odd places. So far, we have attempted to work around this with an XSL hack, but that causes other problems, such as creating run-ins in places like <acronym>SQL</acronym> <command>COPY</command> So fix the problem properly by removing the extra whitespace. I only fixed the problems that affect the man page output, not all the places.
157 lines
4.1 KiB
Plaintext
157 lines
4.1 KiB
Plaintext
<!--
|
|
doc/src/sgml/ref/drop_function.sgml
|
|
PostgreSQL documentation
|
|
-->
|
|
|
|
<refentry id="SQL-DROPFUNCTION">
|
|
<refmeta>
|
|
<refentrytitle>DROP FUNCTION</refentrytitle>
|
|
<manvolnum>7</manvolnum>
|
|
<refmiscinfo>SQL - Language Statements</refmiscinfo>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>DROP FUNCTION</refname>
|
|
<refpurpose>remove a function</refpurpose>
|
|
</refnamediv>
|
|
|
|
<indexterm zone="sql-dropfunction">
|
|
<primary>DROP FUNCTION</primary>
|
|
</indexterm>
|
|
|
|
<refsynopsisdiv>
|
|
<synopsis>
|
|
DROP FUNCTION [ IF EXISTS ] <replaceable class="parameter">name</replaceable> ( [ [ <replaceable class="parameter">argmode</replaceable> ] [ <replaceable class="parameter">argname</replaceable> ] <replaceable class="parameter">argtype</replaceable> [, ...] ] )
|
|
[ CASCADE | RESTRICT ]
|
|
</synopsis>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para>
|
|
<command>DROP FUNCTION</command> removes the definition of an existing
|
|
function. To execute this command the user must be the
|
|
owner of the function. The argument types to the
|
|
function must be specified, since several different functions
|
|
can exist with the same name and different argument lists.
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Parameters</title>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><literal>IF EXISTS</literal></term>
|
|
<listitem>
|
|
<para>
|
|
Do not throw an error if the function does not exist. A notice is issued
|
|
in this case.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><replaceable class="parameter">name</replaceable></term>
|
|
<listitem>
|
|
<para>
|
|
The name (optionally schema-qualified) of an existing function.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><replaceable class="parameter">argmode</replaceable></term>
|
|
|
|
<listitem>
|
|
<para>
|
|
The mode of an argument: <literal>IN</>, <literal>OUT</>,
|
|
<literal>INOUT</>, or <literal>VARIADIC</>.
|
|
If omitted, the default is <literal>IN</>.
|
|
Note that <command>DROP FUNCTION</command> does not actually pay
|
|
any attention to <literal>OUT</> arguments, since only the input
|
|
arguments are needed to determine the function's identity.
|
|
So it is sufficient to list the <literal>IN</>, <literal>INOUT</>,
|
|
and <literal>VARIADIC</> arguments.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><replaceable class="parameter">argname</replaceable></term>
|
|
|
|
<listitem>
|
|
<para>
|
|
The name of an argument.
|
|
Note that <command>DROP FUNCTION</command> does not actually pay
|
|
any attention to argument names, since only the argument data
|
|
types are needed to determine the function's identity.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><replaceable class="parameter">argtype</replaceable></term>
|
|
|
|
<listitem>
|
|
<para>
|
|
The data type(s) of the function's arguments (optionally
|
|
schema-qualified), if any.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><literal>CASCADE</literal></term>
|
|
<listitem>
|
|
<para>
|
|
Automatically drop objects that depend on the function (such as
|
|
operators or triggers).
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><literal>RESTRICT</literal></term>
|
|
<listitem>
|
|
<para>
|
|
Refuse to drop the function if any objects depend on it. This
|
|
is the default.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
|
|
<refsect1 id="SQL-DROPFUNCTION-examples">
|
|
<title>Examples</title>
|
|
|
|
<para>
|
|
This command removes the square root function:
|
|
|
|
<programlisting>
|
|
DROP FUNCTION sqrt(integer);
|
|
</programlisting></para>
|
|
</refsect1>
|
|
|
|
<refsect1 id="SQL-DROPFUNCTION-compatibility">
|
|
<title>Compatibility</title>
|
|
|
|
<para>
|
|
A <command>DROP FUNCTION</command> statement is defined in the SQL
|
|
standard, but it is not compatible with this command.
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
|
|
<simplelist type="inline">
|
|
<member><xref linkend="sql-createfunction"></member>
|
|
<member><xref linkend="sql-alterfunction"></member>
|
|
</simplelist>
|
|
</refsect1>
|
|
|
|
</refentry>
|