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6ef2448796
There is what may actually be a mistake in our markup. The problem is in a situation like <para> <command>FOO</command> is ... there is strictly speaking a line break before "FOO". In the HTML output, this does not appear to be a problem, but in the man page output, this shows up, so you get double blank lines at odd places. So far, we have attempted to work around this with an XSL hack, but that causes other problems, such as creating run-ins in places like <acronym>SQL</acronym> <command>COPY</command> So fix the problem properly by removing the extra whitespace. I only fixed the problems that affect the man page output, not all the places.
149 lines
4.1 KiB
Plaintext
149 lines
4.1 KiB
Plaintext
<!--
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doc/src/sgml/ref/alter_aggregate.sgml
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PostgreSQL documentation
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-->
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<refentry id="SQL-ALTERAGGREGATE">
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<refmeta>
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<refentrytitle>ALTER 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>ALTER AGGREGATE</refname>
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<refpurpose>change the definition of an aggregate function</refpurpose>
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</refnamediv>
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<indexterm zone="sql-alteraggregate">
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<primary>ALTER AGGREGATE</primary>
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</indexterm>
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<refsynopsisdiv>
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<synopsis>
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ALTER AGGREGATE <replaceable>name</replaceable> ( <replaceable>type</replaceable> [ , ... ] ) RENAME TO <replaceable>new_name</replaceable>
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ALTER AGGREGATE <replaceable>name</replaceable> ( <replaceable>type</replaceable> [ , ... ] ) OWNER TO <replaceable>new_owner</replaceable>
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ALTER AGGREGATE <replaceable>name</replaceable> ( <replaceable>type</replaceable> [ , ... ] ) SET SCHEMA <replaceable>new_schema</replaceable>
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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>ALTER AGGREGATE</command> changes the definition of an
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aggregate function.
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</para>
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<para>
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You must own the aggregate function to use <command>ALTER AGGREGATE</>.
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To change the schema of an aggregate function, you must also have
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<literal>CREATE</literal> privilege on the new schema.
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To alter the owner, you must also be a direct or indirect member of the new
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owning role, and that role must have <literal>CREATE</literal> privilege on
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the aggregate function's schema. (These restrictions enforce that altering
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the owner doesn't do anything you couldn't do by dropping and recreating
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the aggregate function. However, a superuser can alter ownership of any
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aggregate function anyway.)
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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><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><replaceable class="parameter">new_name</replaceable></term>
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<listitem>
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<para>
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The new name of 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><replaceable class="parameter">new_owner</replaceable></term>
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<listitem>
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<para>
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The new owner of 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><replaceable class="parameter">new_schema</replaceable></term>
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<listitem>
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<para>
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The new schema for the aggregate function.
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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 rename the aggregate function <literal>myavg</literal> for type
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<type>integer</type> to <literal>my_average</literal>:
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<programlisting>
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ALTER AGGREGATE myavg(integer) RENAME TO my_average;
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</programlisting>
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</para>
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<para>
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To change the owner of the aggregate function <literal>myavg</literal> for type
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<type>integer</type> to <literal>joe</literal>:
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<programlisting>
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ALTER AGGREGATE myavg(integer) OWNER TO joe;
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</programlisting>
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</para>
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<para>
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To move the aggregate function <literal>myavg</literal> for type
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<type>integer</type> into schema <literal>myschema</literal>:
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<programlisting>
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ALTER AGGREGATE myavg(integer) SET SCHEMA myschema;
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</programlisting></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>ALTER 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-createaggregate"></member>
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<member><xref linkend="sql-dropaggregate"></member>
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</simplelist>
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</refsect1>
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</refentry>
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