Name
ALTER AGGREGATE -- change the definition of an aggregate functionSynopsis
ALTER AGGREGATE name ( aggregate_signature ) RENAME TO new_name ALTER AGGREGATE name ( aggregate_signature ) OWNER TO { new_owner | CURRENT_USER | SESSION_USER } ALTER AGGREGATE name ( aggregate_signature ) SET SCHEMA new_schema where aggregate_signature is: * | [ argmode ] [ argname ] argtype [ , ... ] | [ [ argmode ] [ argname ] argtype [ , ... ] ] ORDER BY [ argmode ] [ argname ] argtype [ , ... ]
Description
ALTER AGGREGATE
changes the definition of an aggregate function.
You must own the aggregate function to use ALTER AGGREGATE
. To change the schema of an aggregate function, you must also have CREATE
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 CREATE
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.)
Parameters
name
-
The name (optionally schema-qualified) of an existing aggregate function.
argmode
-
The mode of an argument:
IN
orVARIADIC
. If omitted, the default isIN
. argname
-
The name of an argument. Note that
ALTER AGGREGATE
does not actually pay any attention to argument names, since only the argument data types are needed to determine the aggregate function's identity. argtype
-
An input data type on which the aggregate function operates. To reference a zero-argument aggregate function, write
*
in place of the list of argument specifications. To reference an ordered-set aggregate function, writeORDER BY
between the direct and aggregated argument specifications. new_name
-
The new name of the aggregate function.
new_owner
-
The new owner of the aggregate function.
new_schema
-
The new schema for the aggregate function.
Notes
The recommended syntax for referencing an ordered-set aggregate is to write ORDER BY
between the direct and aggregated argument specifications, in the same style as in CREATE AGGREGATE. However, it will also work to omit ORDER BY
and just run the direct and aggregated argument specifications into a single list. In this abbreviated form, if VARIADIC "any"
was used in both the direct and aggregated argument lists, write VARIADIC "any"
only once.
Examples
To rename the aggregate function myavg
for type integer
to my_average
:
ALTER AGGREGATE myavg(integer) RENAME TO my_average;
To change the owner of the aggregate function myavg
for type integer
to joe
:
ALTER AGGREGATE myavg(integer) OWNER TO joe;
To move the ordered-set aggregate mypercentile
with direct argument of type float8
and aggregated argument of type integer
into schema myschema
:
ALTER AGGREGATE mypercentile(float8 ORDER BY integer) SET SCHEMA myschema;
This will work too:
ALTER AGGREGATE mypercentile(float8, integer) SET SCHEMA myschema;
Compatibility
There is no ALTER AGGREGATE
statement in the SQL standard.
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