191 lines
4.5 KiB
Plaintext
191 lines
4.5 KiB
Plaintext
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_aggregate.sgml,v 1.20 2003/01/19 00:13:29 momjian 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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<refmiscinfo>SQL - Language Statements</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>
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DROP AGGREGATE
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</refname>
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<refpurpose>
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remove a user-defined aggregate function
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</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<refsynopsisdivinfo>
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<date>1999-07-20</date>
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</refsynopsisdivinfo>
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<synopsis>
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DROP AGGREGATE <replaceable class="PARAMETER">name</replaceable> ( <replaceable class="PARAMETER">type</replaceable> ) [ CASCADE | RESTRICT ]
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</synopsis>
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<refsect2 id="R2-SQL-DROPAGGREGATE-1">
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<refsect2info>
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<date>1998-04-15</date>
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</refsect2info>
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<title>
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Inputs
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</title>
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<para>
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<variablelist>
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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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The input data type of the aggregate function,
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or <literal>*</literal> if the function accepts any input type.
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(Refer to the &cite-user; for further information about 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>CASCADE</term>
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<listitem>
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<para>
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Automatically drop objects that depend on the aggregate.
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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>RESTRICT</term>
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<listitem>
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<para>
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Refuse to drop the aggregate if there are any dependent objects.
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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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</para>
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</refsect2>
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<refsect2 id="R2-SQL-DROPAGGREGATE-2">
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<refsect2info>
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<date>1998-04-15</date>
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</refsect2info>
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<title>
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Outputs
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</title>
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<para>
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<variablelist>
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<varlistentry>
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<term><computeroutput>
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DROP AGGREGATE
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</computeroutput></term>
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<listitem>
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<para>
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Message returned if the command is successful.
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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><computeroutput>
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ERROR: RemoveAggregate: aggregate '<replaceable class="parameter">name</replaceable>' for type <replaceable class="parameter">type</replaceable> does not exist
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</computeroutput></term>
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<listitem>
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<para>
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This message occurs if the aggregate function specified does not
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exist in the database.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect2>
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</refsynopsisdiv>
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<refsect1 id="R1-SQL-DROPAGGREGATE-1">
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<refsect1info>
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<date>1998-04-15</date>
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</refsect1info>
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<title>
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Description
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</title>
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<para>
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<command>DROP AGGREGATE</command> will delete an existing
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aggregate definition. To execute this command the current
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user must be the owner of the aggregate.
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</para>
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<refsect2 id="R2-SQL-DROPAGGREGATE-3">
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<refsect2info>
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<date>1998-04-15</date>
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</refsect2info>
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<title>
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Notes
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</title>
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<para>
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Use
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<xref linkend="sql-createaggregate" endterm="sql-createaggregate-title">
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to create aggregate functions.
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</para>
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</refsect2>
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</refsect1>
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<refsect1 id="R1-SQL-DROPAGGREGATE-2">
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<title>
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Usage
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</title>
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<para>
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To remove the <literal>myavg</literal> aggregate for type
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<literal>int4</literal>:
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</para>
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<programlisting>
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DROP AGGREGATE myavg(int4);
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</programlisting>
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</refsect1>
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<refsect1 id="R1-SQL-DROPAGGREGATE-3">
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<title>
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Compatibility
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</title>
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<refsect2 id="R2-SQL-DROPAGGREGATE-4">
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<refsect2info>
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<date>1998-04-15</date>
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</refsect2info>
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<title>
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SQL92
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</title>
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<para>
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There is no <command>DROP AGGREGATE</command> statement
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in <acronym>SQL92</acronym>; the statement is a
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<productname>PostgreSQL</productname>
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language extension.
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</para>
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</refsect2>
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</refsect1>
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</refentry>
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Local variables:
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End:
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