<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >DROP AGGREGATE</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REV="MADE" HREF="mailto:pgsql-docs@postgresql.org"><LINK REL="HOME" TITLE="PostgreSQL 9.6.4 Documentation" HREF="index.html"><LINK REL="UP" TITLE="SQL Commands" HREF="sql-commands.html"><LINK REL="PREVIOUS" TITLE="DROP ACCESS METHOD" HREF="sql-drop-access-method.html"><LINK REL="NEXT" TITLE="DROP CAST" HREF="sql-dropcast.html"><LINK REL="STYLESHEET" TYPE="text/css" HREF="stylesheet.css"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1"><META NAME="creation" CONTENT="2017-08-11T02:27:18"></HEAD ><BODY CLASS="REFENTRY" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="4" ALIGN="center" VALIGN="bottom" ><A HREF="index.html" >PostgreSQL 9.6.4 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="DROP ACCESS METHOD" HREF="sql-drop-access-method.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="sql-commands.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="20%" ALIGN="right" VALIGN="top" ><A TITLE="DROP CAST" HREF="sql-dropcast.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SQL-DROPAGGREGATE" ></A >DROP AGGREGATE</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN85257" ></A ><H2 >Name</H2 >DROP AGGREGATE -- remove an aggregate function</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN85260" ></A ><H2 >Synopsis</H2 ><PRE CLASS="SYNOPSIS" >DROP AGGREGATE [ IF EXISTS ] <TT CLASS="REPLACEABLE" ><I >name</I ></TT > ( <TT CLASS="REPLACEABLE" ><I >aggregate_signature</I ></TT > ) [ CASCADE | RESTRICT ] <SPAN CLASS="phrase" ><SPAN CLASS="PHRASE" >where <TT CLASS="REPLACEABLE" ><I >aggregate_signature</I ></TT > is:</SPAN ></SPAN > * | [ <TT CLASS="REPLACEABLE" ><I >argmode</I ></TT > ] [ <TT CLASS="REPLACEABLE" ><I >argname</I ></TT > ] <TT CLASS="REPLACEABLE" ><I >argtype</I ></TT > [ , ... ] | [ [ <TT CLASS="REPLACEABLE" ><I >argmode</I ></TT > ] [ <TT CLASS="REPLACEABLE" ><I >argname</I ></TT > ] <TT CLASS="REPLACEABLE" ><I >argtype</I ></TT > [ , ... ] ] ORDER BY [ <TT CLASS="REPLACEABLE" ><I >argmode</I ></TT > ] [ <TT CLASS="REPLACEABLE" ><I >argname</I ></TT > ] <TT CLASS="REPLACEABLE" ><I >argtype</I ></TT > [ , ... ]</PRE ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN85275" ></A ><H2 >Description</H2 ><P > <TT CLASS="COMMAND" >DROP AGGREGATE</TT > removes an existing aggregate function. To execute this command the current user must be the owner of the aggregate function. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN85279" ></A ><H2 >Parameters</H2 ><P ></P ><DIV CLASS="VARIABLELIST" ><DL ><DT ><TT CLASS="LITERAL" >IF EXISTS</TT ></DT ><DD ><P > Do not throw an error if the aggregate does not exist. A notice is issued in this case. </P ></DD ><DT ><TT CLASS="REPLACEABLE" ><I >name</I ></TT ></DT ><DD ><P > The name (optionally schema-qualified) of an existing aggregate function. </P ></DD ><DT ><TT CLASS="REPLACEABLE" ><I >argmode</I ></TT ></DT ><DD ><P > The mode of an argument: <TT CLASS="LITERAL" >IN</TT > or <TT CLASS="LITERAL" >VARIADIC</TT >. If omitted, the default is <TT CLASS="LITERAL" >IN</TT >. </P ></DD ><DT ><TT CLASS="REPLACEABLE" ><I >argname</I ></TT ></DT ><DD ><P > The name of an argument. Note that <TT CLASS="COMMAND" >DROP AGGREGATE</TT > does not actually pay any attention to argument names, since only the argument data types are needed to determine the aggregate function's identity. </P ></DD ><DT ><TT CLASS="REPLACEABLE" ><I >argtype</I ></TT ></DT ><DD ><P > An input data type on which the aggregate function operates. To reference a zero-argument aggregate function, write <TT CLASS="LITERAL" >*</TT > in place of the list of argument specifications. To reference an ordered-set aggregate function, write <TT CLASS="LITERAL" >ORDER BY</TT > between the direct and aggregated argument specifications. </P ></DD ><DT ><TT CLASS="LITERAL" >CASCADE</TT ></DT ><DD ><P > 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 <A HREF="ddl-depend.html" >Section 5.13</A >). </P ></DD ><DT ><TT CLASS="LITERAL" >RESTRICT</TT ></DT ><DD ><P > Refuse to drop the aggregate function if any objects depend on it. This is the default. </P ></DD ></DL ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN85324" ></A ><H2 >Notes</H2 ><P > Alternative syntaxes for referencing ordered-set aggregates are described under <A HREF="sql-alteraggregate.html" >ALTER AGGREGATE</A >. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN85328" ></A ><H2 >Examples</H2 ><P > To remove the aggregate function <TT CLASS="LITERAL" >myavg</TT > for type <TT CLASS="TYPE" >integer</TT >: </P><PRE CLASS="PROGRAMLISTING" >DROP AGGREGATE myavg(integer);</PRE ><P> </P ><P > To remove the hypothetical-set aggregate function <TT CLASS="LITERAL" >myrank</TT >, which takes an arbitrary list of ordering columns and a matching list of direct arguments: </P><PRE CLASS="PROGRAMLISTING" >DROP AGGREGATE myrank(VARIADIC "any" ORDER BY VARIADIC "any");</PRE ><P> </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN85337" ></A ><H2 >Compatibility</H2 ><P > There is no <TT CLASS="COMMAND" >DROP AGGREGATE</TT > statement in the SQL standard. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN85341" ></A ><H2 >See Also</H2 ><A HREF="sql-alteraggregate.html" >ALTER AGGREGATE</A >, <A HREF="sql-createaggregate.html" >CREATE AGGREGATE</A ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="sql-drop-access-method.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="sql-dropcast.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >DROP ACCESS METHOD</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="sql-commands.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >DROP CAST</TD ></TR ></TABLE ></DIV ></BODY ></HTML >