<!--
doc/src/sgml/ref/alter_routine.sgml
PostgreSQL documentation
-->

<refentry id="sql-alterroutine">
 <indexterm zone="sql-alterroutine">
  <primary>ALTER ROUTINE</primary>
 </indexterm>

 <refmeta>
  <refentrytitle>ALTER ROUTINE</refentrytitle>
  <manvolnum>7</manvolnum>
  <refmiscinfo>SQL - Language Statements</refmiscinfo>
 </refmeta>

 <refnamediv>
  <refname>ALTER ROUTINE</refname>
  <refpurpose>change the definition of a routine</refpurpose>
 </refnamediv>

 <refsynopsisdiv>
<synopsis>
ALTER ROUTINE <replaceable>name</replaceable> [ ( [ [ <replaceable class="parameter">argmode</replaceable> ] [ <replaceable class="parameter">argname</replaceable> ] <replaceable class="parameter">argtype</replaceable> [, ...] ] ) ]
    <replaceable class="parameter">action</replaceable> [ ... ] [ RESTRICT ]
ALTER ROUTINE <replaceable>name</replaceable> [ ( [ [ <replaceable class="parameter">argmode</replaceable> ] [ <replaceable class="parameter">argname</replaceable> ] <replaceable class="parameter">argtype</replaceable> [, ...] ] ) ]
    RENAME TO <replaceable>new_name</replaceable>
ALTER ROUTINE <replaceable>name</replaceable> [ ( [ [ <replaceable class="parameter">argmode</replaceable> ] [ <replaceable class="parameter">argname</replaceable> ] <replaceable class="parameter">argtype</replaceable> [, ...] ] ) ]
    OWNER TO { <replaceable>new_owner</replaceable> | CURRENT_USER | SESSION_USER }
ALTER ROUTINE <replaceable>name</replaceable> [ ( [ [ <replaceable class="parameter">argmode</replaceable> ] [ <replaceable class="parameter">argname</replaceable> ] <replaceable class="parameter">argtype</replaceable> [, ...] ] ) ]
    SET SCHEMA <replaceable>new_schema</replaceable>
ALTER ROUTINE <replaceable>name</replaceable> [ ( [ [ <replaceable class="parameter">argmode</replaceable> ] [ <replaceable class="parameter">argname</replaceable> ] <replaceable class="parameter">argtype</replaceable> [, ...] ] ) ]
    [ NO ] DEPENDS ON EXTENSION <replaceable>extension_name</replaceable>

<phrase>where <replaceable class="parameter">action</replaceable> is one of:</phrase>

    IMMUTABLE | STABLE | VOLATILE
    [ NOT ] LEAKPROOF
    [ EXTERNAL ] SECURITY INVOKER | [ EXTERNAL ] SECURITY DEFINER
    PARALLEL { UNSAFE | RESTRICTED | SAFE }
    COST <replaceable class="parameter">execution_cost</replaceable>
    ROWS <replaceable class="parameter">result_rows</replaceable>
    SET <replaceable class="parameter">configuration_parameter</replaceable> { TO | = } { <replaceable class="parameter">value</replaceable> | DEFAULT }
    SET <replaceable class="parameter">configuration_parameter</replaceable> FROM CURRENT
    RESET <replaceable class="parameter">configuration_parameter</replaceable>
    RESET ALL
</synopsis>
 </refsynopsisdiv>

 <refsect1>
  <title>Description</title>

  <para>
   <command>ALTER ROUTINE</command> changes the definition of a routine, which
   can be an aggregate function, a normal function, or a procedure.  See
   under <xref linkend="sql-alteraggregate"/>, <xref linkend="sql-alterfunction"/>,
   and <xref linkend="sql-alterprocedure"/> for the description of the
   parameters, more examples, and further details.
  </para>
 </refsect1>

 <refsect1>
  <title>Examples</title>

  <para>
   To rename the routine <literal>foo</literal> for type
   <type>integer</type> to <literal>foobar</literal>:
<programlisting>
ALTER ROUTINE foo(integer) RENAME TO foobar;
</programlisting>
   This command will work independent of whether <literal>foo</literal> is an
   aggregate, function, or procedure.
  </para>
 </refsect1>

 <refsect1>
  <title>Compatibility</title>

  <para>
   This statement is partially compatible with the <command>ALTER
   ROUTINE</command> statement in the SQL standard.  See
   under <xref linkend="sql-alterfunction"/>
   and <xref linkend="sql-alterprocedure"/> for more details.  Allowing
   routine names to refer to aggregate functions is
   a <productname>PostgreSQL</productname> extension.
  </para>
 </refsect1>

 <refsect1>
  <title>See Also</title>

  <simplelist type="inline">
   <member><xref linkend="sql-alteraggregate"/></member>
   <member><xref linkend="sql-alterfunction"/></member>
   <member><xref linkend="sql-alterprocedure"/></member>
   <member><xref linkend="sql-droproutine"/></member>
  </simplelist>

  <para>
   Note that there is no <literal>CREATE ROUTINE</literal> command.
  </para>
 </refsect1>
</refentry>
