<REFENTRY ID="SQL-DROPAGGREGATE">
 <REFMETA>
  <REFENTRYTITLE>
   DROP AGGREGATE
  </REFENTRYTITLE>
  <REFMISCINFO>SQL - Language Statements</REFMISCINFO>
 </REFMETA>
 <REFNAMEDIV>
  <REFNAME>
   DROP AGGREGATE
  </REFNAME>
  <REFPURPOSE>
   Removes the definition of an aggregate function
  </REFPURPOSE>
 <REFSYNOPSISDIV>
  <REFSYNOPSISDIVINFO>
   <DATE>1998-04-15</DATE>
  </REFSYNOPSISDIVINFO>
  <SYNOPSIS>
   DROP AGGREGATE <REPLACEABLE CLASS="PARAMETER">name</REPLACEABLE> <REPLACEABLE CLASS="PARAMETER">type</REPLACEABLE>
  </SYNOPSIS>
  
  <REFSECT2 ID="R2-SQL-DROPAGGREGATE-1">
   <REFSECT2INFO>
    <DATE>1998-04-15</DATE>
   </REFSECT2INFO>
   <TITLE>
    Inputs
   </TITLE>
   <PARA>
   </PARA>
   <VARIABLELIST>
    <VARLISTENTRY>
     <TERM>
     </TERM>
     <LISTITEM>
      <PARA>
       <VARIABLELIST>
	<VARLISTENTRY>
	 <TERM>
	  <ReturnValue><replaceable class="parameter">name</replaceable></ReturnValue>
	 </TERM>
	 <LISTITEM>
	  <PARA>
          The name of an existing aggregate function.
	  </PARA>
	 </LISTITEM>
	</VARLISTENTRY>
	<VARLISTENTRY>
	 <TERM>
	  <ReturnValue><replaceable class="parameter">type</replaceable></ReturnValue>
	 </TERM>
	 <LISTITEM>
	  <PARA>
          The type of an existing aggregate function.
          (Refer to PostgreSQL User's Guide chapter 4 for
	   further information about data types).
	   <comment>This should become a cross-reference rather than a
	    hard-coded chapter number</comment>
	  </PARA>
	 </LISTITEM>
	</VARLISTENTRY>
       </variablelist>
     </LISTITEM>
    </VARLISTENTRY>
   </VARIABLELIST>
  </REFSECT2>
  
  <REFSECT2 ID="R2-SQL-DROPAGGREGATE-2">
   <REFSECT2INFO>
    <DATE>1998-04-15</DATE>
   </REFSECT2INFO>
   <TITLE>
    Outputs
   </TITLE>
   <PARA>
   </PARA>
   <VARIABLELIST>
    <VARLISTENTRY>
     <TERM>
     </TERM>
     <LISTITEM>
      <PARA>
       <VARIABLELIST>
	<VARLISTENTRY>
	 <TERM>
	  <ReturnValue>DROP</ReturnValue>
	 </TERM>
	 <LISTITEM>
	  <PARA>
          Message returned if the command is successful.
	  </PARA>
	 </LISTITEM>
	</VARLISTENTRY>
	<VARLISTENTRY>
	 <TERM>
	  <ReturnValue>WARN RemoveAggregate: aggregate '<replaceable class="parameter">name</replaceable>' for 'type' does not exist</ReturnValue>
	 </TERM>
	 <LISTITEM>
	  <PARA>
          This message occurs if the aggregate function specified does not
	   exist in the database.
	  </PARA>
	 </LISTITEM>
	</VARLISTENTRY>
       </variablelist>
     </LISTITEM>
    </VARLISTENTRY>
   </VARIABLELIST>
  </REFSECT2>
 </REFSYNOPSISDIV>
 
 <REFSECT1 ID="R1-SQL-DROPAGGREGATE-1">
  <REFSECT1INFO>
   <DATE>1998-04-15</DATE>
  </REFSECT1INFO>
  <TITLE>
   Description
  </TITLE>
  <PARA>
   <command>DROP AGGREGATE</command> will remove all references to an existing
   aggregate definition. To execute this command the current
   user must be the owner of the aggregate.
  </PARA>
  
  <REFSECT2 ID="R2-SQL-DROPAGGREGATE-3">
   <REFSECT2INFO>
    <DATE>1998-04-15</DATE>
   </REFSECT2INFO>
   <TITLE>
    Notes
   </TITLE>
   <PARA>
    The <command>DROP AGGREGATE</command> statement is a PostgreSQL
    language extension.
   </PARA>
   <PARA>
    Refer to the <command>CREATE AGGREGATE</command> statement to
    create aggregate functions.
   </PARA>
  </REFSECT2>
 </REFSECT1>
  
 <REFSECT1 ID="R1-SQL-DROPAGGREGATE-2">
  <TITLE>
   Usage
  </TITLE>
  <PARA>
   To remove the <literal>myavg</literal> aggregate for type
   <literal>int4</literal>:
  </PARA>
  <ProgramListing>
   DROP AGGREGATE myavg int4;
  </ProgramListing>
 </REFSECT1>
 
 <REFSECT1 ID="R1-SQL-DROPAGGREGATE-3">
  <TITLE>
   Compatibility
  </TITLE>
  <PARA>
  </PARA>
  
  <REFSECT2 ID="R2-SQL-DROPAGGREGATE-4">
   <REFSECT2INFO>
    <DATE>1998-04-15</DATE>
   </REFSECT2INFO>
   <TITLE>
    SQL92
   </TITLE>
   <PARA>
   There is no DROP AGGREGATE statement in SQL92.
   </PARA>
  </refsect2>
 </refsect1>
</REFENTRY>

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