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postgresql9.6-docs-9.6.22-1.mga7.noarch.rpm

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><H1
><A
NAME="SQL-ALTERAGGREGATE"
></A
>ALTER AGGREGATE</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN72863"
></A
><H2
>Name</H2
>ALTER AGGREGATE&nbsp;--&nbsp;change the definition of an aggregate function</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN72866"
></A
><H2
>Synopsis</H2
><PRE
CLASS="SYNOPSIS"
>ALTER AGGREGATE <TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
> ( <TT
CLASS="REPLACEABLE"
><I
>aggregate_signature</I
></TT
> ) RENAME TO <TT
CLASS="REPLACEABLE"
><I
>new_name</I
></TT
>
ALTER AGGREGATE <TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
> ( <TT
CLASS="REPLACEABLE"
><I
>aggregate_signature</I
></TT
> )
                OWNER TO { <TT
CLASS="REPLACEABLE"
><I
>new_owner</I
></TT
> | CURRENT_USER | SESSION_USER }
ALTER AGGREGATE <TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
> ( <TT
CLASS="REPLACEABLE"
><I
>aggregate_signature</I
></TT
> ) SET SCHEMA <TT
CLASS="REPLACEABLE"
><I
>new_schema</I
></TT
>

<SPAN
CLASS="phrase"
><SPAN
CLASS="PHRASE"
>where <TT
CLASS="REPLACEABLE"
><I
>aggregate_signature</I
></TT
> is:</SPAN
></SPAN
>

* |
[ <TT
CLASS="REPLACEABLE"
><I
>argmode</I
></TT
> ] [ <TT
CLASS="REPLACEABLE"
><I
>argname</I
></TT
> ] <TT
CLASS="REPLACEABLE"
><I
>argtype</I
></TT
> [ , ... ] |
[ [ <TT
CLASS="REPLACEABLE"
><I
>argmode</I
></TT
> ] [ <TT
CLASS="REPLACEABLE"
><I
>argname</I
></TT
> ] <TT
CLASS="REPLACEABLE"
><I
>argtype</I
></TT
> [ , ... ] ] ORDER BY [ <TT
CLASS="REPLACEABLE"
><I
>argmode</I
></TT
> ] [ <TT
CLASS="REPLACEABLE"
><I
>argname</I
></TT
> ] <TT
CLASS="REPLACEABLE"
><I
>argtype</I
></TT
> [ , ... ]</PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN72888"
></A
><H2
>Description</H2
><P
>   <TT
CLASS="COMMAND"
>ALTER AGGREGATE</TT
> changes the definition of an
   aggregate function.
  </P
><P
>   You must own the aggregate function to use <TT
CLASS="COMMAND"
>ALTER AGGREGATE</TT
>.
   To change the schema of an aggregate function, you must also have
   <TT
CLASS="LITERAL"
>CREATE</TT
> privilege on the new schema.
   To alter the owner, you must also be a direct or indirect member of the new
   owning role, and that role must have <TT
CLASS="LITERAL"
>CREATE</TT
> privilege on
   the aggregate function's schema.  (These restrictions enforce that altering
   the owner doesn't do anything you couldn't do by dropping and recreating
   the aggregate function.  However, a superuser can alter ownership of any
   aggregate function anyway.)
  </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN72896"
></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 aggregate function.
     </P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>argmode</I
></TT
></DT
><DD
><P
>      The mode of an argument: <TT
CLASS="LITERAL"
>IN</TT
> or <TT
CLASS="LITERAL"
>VARIADIC</TT
>.
      If omitted, the default is <TT
CLASS="LITERAL"
>IN</TT
>.
     </P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>argname</I
></TT
></DT
><DD
><P
>      The name of an argument.
      Note that <TT
CLASS="COMMAND"
>ALTER AGGREGATE</TT
> does not actually pay
      any attention to argument names, since only the argument data
      types are needed to determine the aggregate function's identity.
     </P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>argtype</I
></TT
></DT
><DD
><P
>      An input data type on which the aggregate function operates.
      To reference a zero-argument aggregate function, write <TT
CLASS="LITERAL"
>*</TT
>
      in place of the list of argument specifications.
      To reference an ordered-set aggregate function, write
      <TT
CLASS="LITERAL"
>ORDER BY</TT
> between the direct and aggregated argument
      specifications.
     </P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>new_name</I
></TT
></DT
><DD
><P
>      The new name of the aggregate function.
     </P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>new_owner</I
></TT
></DT
><DD
><P
>      The new owner of the aggregate function.
     </P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>new_schema</I
></TT
></DT
><DD
><P
>      The new schema for the aggregate function.
     </P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN72940"
></A
><H2
>Notes</H2
><P
>    The recommended syntax for referencing an ordered-set aggregate
    is to write <TT
CLASS="LITERAL"
>ORDER BY</TT
> between the direct and aggregated
    argument specifications, in the same style as in
    <A
HREF="sql-createaggregate.html"
>CREATE AGGREGATE</A
>.  However, it will also work to
    omit <TT
CLASS="LITERAL"
>ORDER BY</TT
> and just run the direct and aggregated
    argument specifications into a single list.  In this abbreviated form,
    if <TT
CLASS="LITERAL"
>VARIADIC "any"</TT
> was used in both the direct and
    aggregated argument lists, write <TT
CLASS="LITERAL"
>VARIADIC "any"</TT
> only once.
   </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN72948"
></A
><H2
>Examples</H2
><P
>   To rename the aggregate function <TT
CLASS="LITERAL"
>myavg</TT
> for type
   <TT
CLASS="TYPE"
>integer</TT
> to <TT
CLASS="LITERAL"
>my_average</TT
>:
</P><PRE
CLASS="PROGRAMLISTING"
>ALTER AGGREGATE myavg(integer) RENAME TO my_average;</PRE
><P>
  </P
><P
>   To change the owner of the aggregate function <TT
CLASS="LITERAL"
>myavg</TT
> for type
   <TT
CLASS="TYPE"
>integer</TT
> to <TT
CLASS="LITERAL"
>joe</TT
>:
</P><PRE
CLASS="PROGRAMLISTING"
>ALTER AGGREGATE myavg(integer) OWNER TO joe;</PRE
><P>
  </P
><P
>   To move the ordered-set aggregate <TT
CLASS="LITERAL"
>mypercentile</TT
> with
   direct argument of type <TT
CLASS="TYPE"
>float8</TT
> and aggregated argument
   of type <TT
CLASS="TYPE"
>integer</TT
> into schema <TT
CLASS="LITERAL"
>myschema</TT
>:
</P><PRE
CLASS="PROGRAMLISTING"
>ALTER AGGREGATE mypercentile(float8 ORDER BY integer) SET SCHEMA myschema;</PRE
><P>
   This will work too:
</P><PRE
CLASS="PROGRAMLISTING"
>ALTER AGGREGATE mypercentile(float8, integer) SET SCHEMA myschema;</PRE
><P>
  </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN72967"
></A
><H2
>Compatibility</H2
><P
>   There is no <TT
CLASS="COMMAND"
>ALTER AGGREGATE</TT
> statement in the SQL
   standard.
  </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN72971"
></A
><H2
>See Also</H2
><A
HREF="sql-createaggregate.html"
>CREATE AGGREGATE</A
>, <A
HREF="sql-dropaggregate.html"
>DROP AGGREGATE</A
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