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125 lines
3.0 KiB
Plaintext
125 lines
3.0 KiB
Plaintext
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$PostgreSQL: pgsql/doc/src/sgml/ref/drop_aggregate.sgml,v 1.32 2008/11/14 10:22:46 petere Exp $
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PostgreSQL documentation
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-->
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<refentry id="SQL-DROPAGGREGATE">
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<refmeta>
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<refentrytitle id="SQL-DROPAGGREGATE-TITLE">DROP AGGREGATE</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 AGGREGATE</refname>
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<refpurpose>remove an aggregate function</refpurpose>
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</refnamediv>
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<indexterm zone="sql-dropaggregate">
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<primary>DROP AGGREGATE</primary>
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</indexterm>
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<refsynopsisdiv>
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<synopsis>
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DROP AGGREGATE [ IF EXISTS ] <replaceable class="PARAMETER">name</replaceable> ( <replaceable class="PARAMETER">type</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 AGGREGATE</command> removes an existing
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aggregate function. To execute this command the current
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user must be the owner of the aggregate function.
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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 aggregate 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 (optionally schema-qualified) of an existing aggregate function.
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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">type</replaceable></term>
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<listitem>
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<para>
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An input data type on which the aggregate function operates.
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To reference a zero-argument aggregate function, write <literal>*</>
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in place of the list of input data types.
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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 aggregate function.
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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 aggregate function if any objects depend on
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it. 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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</refsect1>
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<refsect1>
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<title>Examples</title>
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<para>
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To remove the aggregate function <literal>myavg</literal> for type
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<type>integer</type>:
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<programlisting>
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DROP AGGREGATE myavg(integer);
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</programlisting>
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</para>
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</refsect1>
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<refsect1>
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<title>Compatibility</title>
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<para>
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There is no <command>DROP AGGREGATE</command> statement in the SQL
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standard.
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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-alteraggregate" endterm="sql-alteraggregate-title"></member>
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<member><xref linkend="sql-createaggregate" endterm="sql-createaggregate-title"></member>
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</simplelist>
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</refsect1>
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</refentry>
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