ALTER_AGGREGATE - change the definition of an aggregate function

There is no ALTERAGGREGATE statement in the SQL standard.

ALTERAGGREGATE changes the definition of an aggregate function. You must own the aggregate function to use ALTERAGGREGATE. To change the schema of an aggregate function, you must also have CREATE privilege on the new schema. To alter the owner, you must be able to SET ROLE to 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.)

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;

ALTER_AGGREGATE - change the definition of an aggregate function

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 CREATEAGGREGATE. 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.

name The name (optionally schema-qualified) of an existing aggregate function. argmode The mode of an argument: IN or VARIADIC. If omitted, the default is IN. argname The name of an argument. Note that ALTERAGGREGATE 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, write ORDER 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.

CREATE AGGREGATE (CREATE_AGGREGATE(7)), DROP AGGREGATE (DROP_AGGREGATE(7)) PostgreSQL 17.5 2025 ALTERAGGREGATE(7)

ALTER AGGREGATE name ( aggregate_signature ) RENAME TO new_name ALTER AGGREGATE name ( aggregate_signature ) OWNER TO { new_owner | CURRENT_ROLE | 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 [ , ... ]