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+<!--
+doc/src/sgml/ref/drop_aggregate.sgml
+PostgreSQL documentation
+-->
+
+<refentry id="sql-dropaggregate">
+ <indexterm zone="sql-dropaggregate">
+  <primary>DROP AGGREGATE</primary>
+ </indexterm>
+
+ <refmeta>
+  <refentrytitle>DROP AGGREGATE</refentrytitle>
+  <manvolnum>7</manvolnum>
+  <refmiscinfo>SQL - Language Statements</refmiscinfo>
+ </refmeta>
+
+ <refnamediv>
+  <refname>DROP AGGREGATE</refname>
+  <refpurpose>remove an aggregate function</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+<synopsis>
+DROP AGGREGATE [ IF EXISTS ] <replaceable>name</replaceable> ( <replaceable>aggregate_signature</replaceable> ) [, ...] [ CASCADE | RESTRICT ]
+
+<phrase>where <replaceable>aggregate_signature</replaceable> is:</phrase>
+
+* |
+[ <replaceable>argmode</replaceable> ] [ <replaceable>argname</replaceable> ] <replaceable>argtype</replaceable> [ , ... ] |
+[ [ <replaceable>argmode</replaceable> ] [ <replaceable>argname</replaceable> ] <replaceable>argtype</replaceable> [ , ... ] ] ORDER BY [ <replaceable>argmode</replaceable> ] [ <replaceable>argname</replaceable> ] <replaceable>argtype</replaceable> [ , ... ]
+</synopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+  <title>Description</title>
+
+  <para>
+   <command>DROP AGGREGATE</command> removes an existing
+   aggregate function. To execute this command the current
+   user must be the owner of the aggregate function.
+  </para>
+ </refsect1>
+
+ <refsect1>
+  <title>Parameters</title>
+
+  <variablelist>
+
+   <varlistentry>
+    <term><literal>IF EXISTS</literal></term>
+    <listitem>
+     <para>
+      Do not throw an error if the aggregate 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 aggregate function.
+     </para>
+    </listitem>
+   </varlistentry>
+
+   <varlistentry>
+    <term><replaceable class="parameter">argmode</replaceable></term>
+
+    <listitem>
+     <para>
+      The mode of an argument: <literal>IN</literal> or <literal>VARIADIC</literal>.
+      If omitted, the default is <literal>IN</literal>.
+     </para>
+    </listitem>
+   </varlistentry>
+
+   <varlistentry>
+    <term><replaceable class="parameter">argname</replaceable></term>
+
+    <listitem>
+     <para>
+      The name of an argument.
+      Note that <command>DROP AGGREGATE</command> does not actually pay
+      any attention to argument names, since only the argument data
+      types are needed to determine the aggregate function's identity.
+     </para>
+    </listitem>
+   </varlistentry>
+
+   <varlistentry>
+    <term><replaceable class="parameter">argtype</replaceable></term>
+    <listitem>
+     <para>
+      An input data type on which the aggregate function operates.
+      To reference a zero-argument aggregate function, write <literal>*</literal>
+      in place of the list of argument specifications.
+      To reference an ordered-set aggregate function, write
+      <literal>ORDER BY</literal> between the direct and aggregated argument
+      specifications.
+     </para>
+    </listitem>
+   </varlistentry>
+
+   <varlistentry>
+    <term><literal>CASCADE</literal></term>
+    <listitem>
+     <para>
+      Automatically drop objects that depend on the aggregate function
+      (such as views using it),
+      and in turn all objects that depend on those objects
+      (see <xref linkend="ddl-depend"/>).
+     </para>
+    </listitem>
+   </varlistentry>
+
+   <varlistentry>
+    <term><literal>RESTRICT</literal></term>
+    <listitem>
+     <para>
+      Refuse to drop the aggregate function if any objects depend on
+      it.  This is the default.
+     </para>
+    </listitem>
+   </varlistentry>
+  </variablelist>
+ </refsect1>
+
+ <refsect1>
+  <title>Notes</title>
+
+   <para>
+    Alternative syntaxes for referencing ordered-set aggregates
+    are described under <xref linkend="sql-alteraggregate"/>.
+   </para>
+ </refsect1>
+
+ <refsect1>
+  <title>Examples</title>
+
+  <para>
+   To remove the aggregate function <literal>myavg</literal> for type
+   <type>integer</type>:
+<programlisting>
+DROP AGGREGATE myavg(integer);
+</programlisting>
+  </para>
+
+  <para>
+   To remove the hypothetical-set aggregate function <literal>myrank</literal>,
+   which takes an arbitrary list of ordering columns and a matching list
+   of direct arguments:
+<programlisting>
+DROP AGGREGATE myrank(VARIADIC "any" ORDER BY VARIADIC "any");
+</programlisting>
+  </para>
+
+  <para>
+   To remove multiple aggregate functions in one command:
+<programlisting>
+DROP AGGREGATE myavg(integer), myavg(bigint);
+</programlisting></para>
+</refsect1>
+
+ <refsect1>
+  <title>Compatibility</title>
+
+  <para>
+   There is no <command>DROP AGGREGATE</command> statement in the SQL
+   standard.
+  </para>
+ </refsect1>
+
+ <refsect1>
+  <title>See Also</title>
+
+  <simplelist type="inline">
+   <member><xref linkend="sql-alteraggregate"/></member>
+   <member><xref linkend="sql-createaggregate"/></member>
+  </simplelist>
+ </refsect1>
+
+</refentry>