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><H1
><A
NAME="SQL-ALTERFUNCTION"
></A
>ALTER FUNCTION</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN36597"
></A
><H2
>Name</H2
>ALTER FUNCTION -- change the definition of a function</DIV
><A
NAME="AEN36600"
></A
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN36602"
></A
><H2
>Synopsis</H2
><PRE
CLASS="SYNOPSIS"
>ALTER FUNCTION <TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
> ( [ <TT
CLASS="REPLACEABLE"
><I
>type</I
></TT
> [, ...] ] ) RENAME TO <TT
CLASS="REPLACEABLE"
><I
>newname</I
></TT
>
ALTER FUNCTION <TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
> ( [ <TT
CLASS="REPLACEABLE"
><I
>type</I
></TT
> [, ...] ] ) OWNER TO <TT
CLASS="REPLACEABLE"
><I
>newowner</I
></TT
></PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN36610"
></A
><H2
>Description</H2
><P
> <TT
CLASS="COMMAND"
>ALTER FUNCTION</TT
> changes the definition of a
function.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN36614"
></A
><H2
>Parameters</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
></DT
><DD
><P
> The name (optionally schema-qualified) of an existing function.
</P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>type</I
></TT
></DT
><DD
><P
> The data type of an argument of the function.
</P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>newname</I
></TT
></DT
><DD
><P
> The new name of the function.
</P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>newowner</I
></TT
></DT
><DD
><P
> The new owner of the function.
To change the owner of a function, you must be a superuser.
Note that if the function is marked
<TT
CLASS="LITERAL"
>SECURITY DEFINER</TT
>,
it will subsequently execute as the new owner.
</P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN36638"
></A
><H2
>Examples</H2
><P
> To rename the function <TT
CLASS="LITERAL"
>sqrt</TT
> for type
<TT
CLASS="TYPE"
>integer</TT
> to <TT
CLASS="LITERAL"
>square_root</TT
>:
</P><PRE
CLASS="PROGRAMLISTING"
>ALTER FUNCTION sqrt(integer) RENAME TO square_root;</PRE
><P>
</P
><P
> To change the owner of the function <TT
CLASS="LITERAL"
>sqrt</TT
> for type
<TT
CLASS="TYPE"
>integer</TT
> to <TT
CLASS="LITERAL"
>joe</TT
>:
</P><PRE
CLASS="PROGRAMLISTING"
>ALTER FUNCTION sqrt(integer) OWNER TO joe;</PRE
><P>
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN36650"
></A
><H2
>Compatibility</H2
><P
> There is an <TT
CLASS="COMMAND"
>ALTER FUNCTION</TT
> statement in the SQL
standard, but it does not provide the option to rename the
function or change the owner.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN36654"
></A
><H2
>See Also</H2
><A
HREF="sql-createfunction.html"
><I
>CREATE FUNCTION</I
></A
>, <A
HREF="sql-dropfunction.html"
><I
>DROP FUNCTION</I
></A
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